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with Model Builder"
REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in QGIS: JOINS WITH EXCEL TABLES The present topic is meant as a brief review since the possibility of loading and attach Excel tables was introduced by QGis 1.8. As we do not follow the general logic, for new users it MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer LES OUTILS DE VALIDATION DES GÉOMÉTRIES (3): FME Après avoir vu l’outil ArcMap (Les outils SIG de validation des géométries (1)), puis les outils Spatialite/Postgis (Les outils SIG de validation des géométries(2) : Spatialite et PostGis), nous allons voir les outils disponibles avec le logiciel FME.Les deux premiers articles ont abordé des outils spécifiques à un type de format: shape et geodatabases ArcGis, bases Spatialite ou LE FORMAT GEOPACKAGE ET QGIS 3 Je n’ai pas de réponse aujourd’hui, je suis dessus. Au fait, si vous travaillez avec QGis 3 (3.4) vous pouvez sans problème intégrer des rasters dans un geopackage en utilisant la méthode charger le raster en tant que couche dans QGis -> cliquer sur Exporter ->Enregistrer sous
EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in QGIS: JOINS WITH EXCEL TABLES The present topic is meant as a brief review since the possibility of loading and attach Excel tables was introduced by QGis 1.8. As we do not follow the general logic, for new users it MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer LES OUTILS DE VALIDATION DES GÉOMÉTRIES (3): FME Après avoir vu l’outil ArcMap (Les outils SIG de validation des géométries (1)), puis les outils Spatialite/Postgis (Les outils SIG de validation des géométries(2) : Spatialite et PostGis), nous allons voir les outils disponibles avec le logiciel FME.Les deux premiers articles ont abordé des outils spécifiques à un type de format: shape et geodatabases ArcGis, bases Spatialite ou LE FORMAT GEOPACKAGE ET QGIS 3 Je n’ai pas de réponse aujourd’hui, je suis dessus. Au fait, si vous travaillez avec QGis 3 (3.4) vous pouvez sans problème intégrer des rasters dans un geopackage en utilisant la méthode charger le raster en tant que couche dans QGis -> cliquer sur Exporter ->Enregistrer sous
ACCESS AN ESRI PERSONAL GEODATABASE WITH QGIS (2.18 OR 3.0 If you have installed a 64-bit version of QGIS on Windows and you find that GeoDatabases Personal (* .mdb) does not work anymore, this solution can solve the problem. If you did not install Microsoft Office 64-bit on your machine, install microsoft access database engine 64 bit. This method solves the problem for QGis versions 2.18and 3.0. In the
CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
POINTS TO LINE WITH QGIS In a previous article we discussed how to create a layer lines from a file text or Excel with Arcmap . Now is the turn with QGis.There are only two differences : the first is that it is not necessary to load the Excel table, and then save it in as a layer (shapefile) the CUTTING RASTERS USING ARCGIS HOW TO CUT RASTERS IN ARCMAP You could be surprised but, actually, there are two ways to cut rasters in ArcMap. The classical technique is the “raster clip” (“raster cutting”) tool in ArcToolbox. EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
DISPLAYING MARINE CHARTS WITH S57 QGIS The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to quickly integrate a great deal of information are the marine electronic charts (ENC). In a single data set you Continue reading "Displaying marine charts HOW TO PUBLISH YOUR QGIS MAPS IN THE WEB WITH QGIS CLOUD QGIS cloud is a free platform to upload online and share your maps with anyone . QGis advantage is to have the chance of preparing your own maps using Qgis and upload them online in GEOPACKAGE FORMAT AND QGIS 3 An open format for geospatial information GeoPackage is a compact, portable, self-descriptive and open, standards-based, platform independent and allowing geospatial information transfer format. The GeoPackage standard is composed of a set of conventions to store in a SQLite database the following items: vector entities matrixes from images and rasters tiles with different HOW TO CREATE A SPATIALITE DATABASE WITH QGIS In this article we will examine the use of SpatiaLite, an open source cross-platform software, simple, lightweight and robust. SpatiaLite is a spatial database management system (DBMS) is an extension of SQLite, a DBMS intrinsically simple and lightweight. QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer CUTTING RASTERS USING ARCGIS HOW TO CUT RASTERS IN ARCMAP Management> Raster> Raster Processing> Clip), double-click the clip. tool. Fill in the fields: Input raster ( required) this. is the raster from which you want. to extract a part. We want to. cut the raster “2011-1820-6787-OL-RGB-L93.jp2”. Output range (optional) it’s. HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer CUTTING RASTERS USING ARCGIS HOW TO CUT RASTERS IN ARCMAP Management> Raster> Raster Processing> Clip), double-click the clip. tool. Fill in the fields: Input raster ( required) this. is the raster from which you want. to extract a part. We want to. cut the raster “2011-1820-6787-OL-RGB-L93.jp2”. Output range (optional) it’s. HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" ACCESS AN ESRI PERSONAL GEODATABASE WITH QGIS (2.18 OR 3.0 If you have installed a 64-bit version of QGIS on Windows and you find that GeoDatabases Personal (* .mdb) does not work anymore, this solution can solve the problem. If you did not install Microsoft Office 64-bit on your machine, install microsoft access database engine 64 bit. This method solves the problem for QGis versions 2.18and 3.0. In the
IMAGE CLASSIFICATION TUTORIAL WITH QGIS: 2.1 ATMOSPHERIC We have previously seen how to correct Landsat images for TOA (top-of-atmosphere)reflectance. Here is a diagram that will help us understand the following: Therefore the reflectance we have calculated is the% of light reflected to the totality of the incident visible light. But as we can see in the diagram,the satellite sensor measures two things Continue reading "Image IMAGE CLASSIFICATION TUTORIAL WITH QGIS: 2.2- IMAGES To begin with, it is important to understand that image enhancement is applied to facilitate visual interpretation and understanding of images. The enhancement will not change the radiometric values of the objects in the image; it will just allow an observer a better view of these objects. This step, therefore, only serves to help the Continue reading "Image classification tutorial with HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configurethem and
CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" HOW TO CREATE A LOCATION MAP WITH QGIS 3.4 (MADEIRA Location maps allow a more global overview of the study area represented on the main map The principle is very simple: these are two maps in a single setting. The location map will have a particular feature: we will freeze the area , the layers displayed and the symbology of these layers once for all Continue reading "How to create a location map with QGis 3.4 (Madeira)" HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
DISPLAYING MARINE CHARTS WITH S57 QGIS The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to quickly integrate a great deal of information are the marine electronic charts (ENC). In a single data set you Continue reading "Displaying marine charts QGIS 2.12 INNOVATION: REDUCE THE SIZE OF YOUR PDF When you create print composer output pdf, the vector layers are converted in pdf by using all points present in the layer entities. If you use of bulky layers, this results in large size pdf. In QGis version 2.12 you have a new option that allows you to settle this problem . Let’s consider as Continue reading "QGis 2.12 Innovation: reduce the size of your pdf" GEOPACKAGE FORMAT AND QGIS 3 An open format for geospatial information GeoPackage is a compact, portable, self-descriptive and open, standards-based, platform independent and allowing geospatial information transfer format. The GeoPackage standard is composed of a set of conventions to store in a SQLite database the following items: vector entities matrixes from images and rasters tiles with different ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" CUTTING RASTERS USING ARCGIS HOW TO CUT RASTERS IN ARCMAP Management> Raster> Raster Processing> Clip), double-click the clip. tool. Fill in the fields: Input raster ( required) this. is the raster from which you want. to extract a part. We want to. cut the raster “2011-1820-6787-OL-RGB-L93.jp2”. Output range (optional) it’s. QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges ARCBRUTILE NEW VERSION, ARCGIS 10.3 COMPATIBLE ArcBruTile new version, ArcGis 10.3 compatible. 0.5 new version is available. To download, follow. information to make the most of it. We will discuss one by one the toolbar available options. software that is used by OSM to draw the main map. OSM. CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" CUTTING RASTERS USING ARCGIS HOW TO CUT RASTERS IN ARCMAP Management> Raster> Raster Processing> Clip), double-click the clip. tool. Fill in the fields: Input raster ( required) this. is the raster from which you want. to extract a part. We want to. cut the raster “2011-1820-6787-OL-RGB-L93.jp2”. Output range (optional) it’s. QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges ARCBRUTILE NEW VERSION, ARCGIS 10.3 COMPATIBLE ArcBruTile new version, ArcGis 10.3 compatible. 0.5 new version is available. To download, follow. information to make the most of it. We will discuss one by one the toolbar available options. software that is used by OSM to draw the main map. OSM. CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configure them and Continue reading "How to install QGis Server in REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
IMAGE CLASSIFICATION TUTORIAL WITH QGIS: 2.1 ATMOSPHERIC We have previously seen how to correct Landsat images for TOA (top-of-atmosphere)reflectance. Here is a diagram that will help us understand the following: Therefore the reflectance we have calculated is the% of light reflected to the totality of the incident visible light. But as we can see in the diagram,the satellite sensor measures two things Continue reading "Image CONDITIONAL FORMATTING OF ATTRIBUTE TABLES WITH QGIS 2.12 Following innovations introduced by QGis version 2.12 : as in Excel tables, now you can control the cells setting of the attribute table of a layer . Now you can apply conditional rules on the format implementation of the attribute table. To this end , open the attribute table of a layer . On the Continue reading "Conditional formatting of attribute tables with QGis 2.12" DISPLAYING MARINE CHARTS WITH S57 QGIS The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to quickly integrate a great deal of information are the marine electronic charts (ENC). In a single data set you Continue reading "Displaying marine charts ACCESS AN ESRI PERSONAL GEODATABASE WITH QGIS (2.18 OR 3.0 If you have installed a 64-bit version of QGIS on Windows and you find that GeoDatabases Personal (* .mdb) does not work anymore, this solution can solve the problem. If you did not install Microsoft Office 64-bit on your machine, install microsoft access database engine 64 bit. This method solves the problem for QGis versions 2.18and 3.0. In the
HOW TO CREATE A LOCATION MAP WITH QGIS 3.4 (MADEIRA Location maps allow a more global overview of the study area represented on the main map The principle is very simple: these are two maps in a single setting. The location map will have a particular feature: we will freeze the area , the layers displayed and the symbology of these layers once for all Continue reading "How to create a location map with QGis 3.4 (Madeira)" THE NEW FIELD CALCULATOR IN ARCGIS PRO One of the most common tools for data management is the famous ArcGIS Field Calculator. When you are on a tabular view, by right- clicking on the field name (column), you find the option “Field Calculator” which opens the famous calculator: Similarly ArcGis Pro performs the same operation and opens the field calculator window: Continue reading "The new field calculator in ArcGis Pro" HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configurethem and
HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
ARCBRUTILE NEW VERSION, ARCGIS 10.3 COMPATIBLE ArcBruTile new version, ArcGis 10.3 compatible. 0.5 new version is available. To download, follow. information to make the most of it. We will discuss one by one the toolbar available options. software that is used by OSM to draw the main map. OSM. SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATIONPOSTGRESQL DATABASE REPLICATIONPOSTGRESQL 11 REPLICATION TUTORIAL We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer LE FORMAT GEOPACKAGE ET QGIS 3 GeoPackage est un format compact, portable, auto-descriptif et ouvert, basé sur des normes, indépendant de la plate-forme et permettant de transférer des informations géospatiales. Le standard GeoPackage est composé d’un ensemble de conventions pour stocker dans une base de données SQLite les éléments suivants : des entités vectorielles. DISPLAYING MARINE CHARTS WITH S57 QGIS The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to quickly integrate a great deal of information are the marine electronic charts (ENC). In a single data set you Continue reading "Displaying marine charts COMMENT INTÉGRER DES DONNÉES DWG DANS QGIS HOW TO INTEGRATE DWG DATA IN QGIS The DWG format is an Autocad proprietary binary format. When we want to load layers in QGis from this format, multiple problems arise. QGis uses the GDAL library to read / write external formats , such as DWG. Firstly a clarification: do not confuse the DWG format and DXF format. Often references for DWG / Continue reading "How to integrate DWG datain QGis"
ARCBRUTILE NEW VERSION, ARCGIS 10.3 COMPATIBLE ArcBruTile new version, ArcGis 10.3 compatible. 0.5 new version is available. To download, follow. information to make the most of it. We will discuss one by one the toolbar available options. software that is used by OSM to draw the main map. OSM. SHARE YOUR RESOURCES (SYMBOLS, IMAGES, SCRIPTS) FOR QGIS The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored remotely (for now the plugin supports Github and Bitbucket as public repositories), the local file system, or an http server Continue reading "Share your resources (symbols, images, scripts GEOMETRY VALIDATION TOOLS (5) WITH QGIS In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it! First observation: the documentation does not exist (not yet?). Therefore you have to go through tests and see what Continue reading "Geometry validation tools (5) with QGis" REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATIONPOSTGRESQL DATABASE REPLICATIONPOSTGRESQL 11 REPLICATION TUTORIAL We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. MAKE A TOPOGRAPHIC MAP WITH QGIS Thanks to the SRTM project we can access to a comprehensive world coverage of land elevation data. It has become very simple to create one’s own topographic maps with QGis . We will discuss here : – how to download elevation data for the area of interest – how to format the display style to fit the standards of the topographic maps – how to enhance the viewing using a “shady” layer LE FORMAT GEOPACKAGE ET QGIS 3 GeoPackage est un format compact, portable, auto-descriptif et ouvert, basé sur des normes, indépendant de la plate-forme et permettant de transférer des informations géospatiales. Le standard GeoPackage est composé d’un ensemble de conventions pour stocker dans une base de données SQLite les éléments suivants : des entités vectorielles. DISPLAYING MARINE CHARTS WITH S57 QGIS The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to quickly integrate a great deal of information are the marine electronic charts (ENC). In a single data set you Continue reading "Displaying marine charts COMMENT INTÉGRER DES DONNÉES DWG DANS QGIS REPLICATING A POSTGRESQL DATABASE IN A WINDOWS WORKSTATION We will configure a logic replication of a database table of our linux server in a postgresql installation in a windows workstation. The replication allows us to keep an updated copy of the centralized database in a remote station. This copy will not be used for local updates since it will be read-only. On the other hand, it allows us to work offline and much faster, since the exchanges ARCGIS QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of Continuer la lecture de « ArcGISQGis.
QGIS: JOINS WITH EXCEL TABLES Joining Shapefile – Excel. Double-click the shapefile layer in the Layers panel. The properties window of the layer opens. Select Joints tab and click on the green cross to add a join. The join definition window opens. In Join Layer select the Excel table . In join field in the attached layer select the key field of your Excel table. IMAGE CLASSIFICATION TUTORIAL WITH QGIS: 2.1 ATMOSPHERIC We have previously seen how to correct Landsat images for TOA (top-of-atmosphere)reflectance. Here is a diagram that will help us understand the following: Therefore the reflectance we have calculated is the% of light reflected to the totality of the incident visible light. But as we can see in the diagram,the satellite sensor measures two things Continue reading "Image .QFIELD: THE MOBILE DEVICE OF QGIS FOR ANDROID Launch QField from your mobile desktop. You will have a project selection window, tap the button to browse the files. Browse the directories, in our Android / Data / Campus example, select the project’s .qgs file and click Open. QField opens the project USING R IN QGIS PROCESSING Although R is essentially a set of statisticals, its use has been extended to a number of areas, such as natural language processing. This library possesses also solic tools of spatial analysis, including analysis of the distributions of points and the Bayesian geostatical modelling. It is possible to read and manage a variety of vector Continue reading "Using R in QGis processing" EXCEL TABLES WITH MODEL BUILDER Although this article is, primarily, aimed at novice users of Model Builder, it can be helpful for more advanced users since, even though, the procedure may seem simple at first, has a trap. In our example, we will use an Excel table downloaded from INSEE, with unemployment data by municipality from 2001 to 2012 ( Continue reading "Excel tableswith Model Builder"
HOW TO CREATE A LOCATION MAP WITH QGIS 3.4 (MADEIRA Location maps allow a more global overview of the study area represented on the main map The principle is very simple: these are two maps in a single setting. The location map will have a particular feature: we will freeze the area , the layers displayed and the symbology of these layers once for all Continue reading "How to create a location map with QGis 3.4 (Madeira)" HOW TO INSTALL QGIS SERVER IN WINDOWS 10 If you want to install QGis Server in a Windows computer, you will start a long road full of pitfalls. Firstly, 95% of the available documentation is to perform the installation with Linux. Secondly, WEB searches return pages from time immemorial, mostly outdated or obsolete. Thirdly, you have to install several components, configurethem and
THE NEW FIELD CALCULATOR IN ARCGIS PRO One of the most common tools for data management is the famous ArcGIS Field Calculator. When you are on a tabular view, by right- clicking on the field name (column), you find the option “Field Calculator” which opens the famous calculator: Similarly ArcGis Pro performs the same operation and opens the field calculator window: Continue reading "The new field calculator in ArcGis Pro" Aller au contenu principal BLOG SIG & TERRITOIRES L'accompagnement ("coaching") SIG au service de la gestion desterritoires
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Publié le 1 juillet 20191 juillet 2019 QGIS 3.8 ET GRASS 7: LES TRAITEMENTS AFFICHENT UNE ERREUR « CET ALGORITHME NE PEUT PAS ÊTRE LANCÉ » Si vous avez installé la version 3.8 de QGis vous aurez une mauvaise surprise en essayant d’exécuter des traitements GRASS: Mais c’est surtout quand vous essayez de corriger l’erreur en vous basant sur le texte du message que la surprise est encore plusmauvaise:
L’option de configuration du répertoire de GRASS 7 a disparu. C’est en essayant de voir pourquoi le répertoire indiqué dans le message (grass-7.6.0 ) ne contenait pas des modules valides que je me suis aperçu que le répertoire de GRASS dans cette version de l’installateur QGis est nommé « GRASS76« . Pour résoudre le problème et, à nouveau, pouvoir exécuter les traitements GRASS, il suffit de renommer le répertoire GRASS76 en GRASS-7.6.0 (c:/Programmes/QGis3.8/apps/grass/grass-7.6.0)* __0
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Publié le 1 juillet 20191 juillet 2019 UNE FONCTION PL/PGSQL POUR L’ANALYSE EXPLORATOIRE DE DONNÉES SPATIALES AVEC DES POLYGONES DE VORONOÏ L’analyse exploratoire des données spatiales est une étape incontournable dans les processus d’analyse spatiale. Un des outils pour cette exploration est la construction des polygones de Voronoï. (Voir Analyse exploratoire des données pour la géostatistique:les diagrammes de Voronoï)
Si l’extension Geostatistical Analyst d’ArcGis permet une grande variété d’affichages d’une couche de polygones de Voronoï, avec QGis on est limités au simple affichage des polygones et des valeurs de l’attribut analysé. Ce qui manque c’est les différents affichages correspondant à des statistiques locales. Dans un précédent article (Calculer des moyennes locales sur des polygones de Voronoï avec Qgis),
qui commence à dater, nous avions donné les moyens d’afficher la vue « Moyenne » des polygones: Pour chaque polygone on recherche les polygones qui ont un côté ou un vertex commun avec lui, puis on calcule la moyenne d’un attribut pour cet ensemble (la moyenne du polygone central plus les valeurs des polygones adjacents). C’est cette moyenne qui est affectée au polygone au lieu de la valeur originale de l’attribut.. Continuer la lecture de « Une fonction PL/pgsql pour l’analyse exploratoire de données spatiales avec des polygones de Voronoï »* __0
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Publié le 27 juin 201927 juin 2019 QGIS 3.8, HOTSPOT ANALYSIS PLUGIN ET PYSAL Tout d’abord, la date: on est le 26 juin 2019. J’ai eu des problèmes pour installer le plugin HotSpot Analysis et le plus dur quand on cherche sur le net c’est qu’on tombe pelle mêle sur des solutions du mois dernier et d’il y a 10 ans. Mais il faut un travail de détective pour savoir de quand elles datent. Donc, si vous êtes en 2025, il est fort probable que les solutions que je propose dans cet article ne soient plus les bonnes… Le plugin HotSpot Analysis est une bonne alternative pour la cartographie d’auto-correlations spatiales. Par contre, il souffre, actuellement d’un manque de « finition » dans son processus d’installation et d’un petit retard de maintenance. Continuer la lecture de « QGis 3.8, HotSpot Analysis Plugin et PySal »* __0
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Publié le 26 juin 201926 juin 2019 POSTGRESQL ET PL/PGSQL: UNE PETITE INITIATION AUX FONCTIONS PL/pgsql est un puissant langage de script SQL fortement influencé par PL/SQL, le langage de procédure stocké distribué avec Oracle. Il est inclus dans la grande majorité des installations de PostgreSQL comme une partie standard du produit, donc il ne nécessite aucune configuration pour être utilisé. PL/pgsql a aussi un petit côté secret . Les développeurs PostgreSQL ne veulent pas que vous sachiez que c’est un langage de développement SQL à part entière, capable de faire à peu près tout dans la base de données PostgreSQL. Pourquoi est-ce un secret ? Pendant des années, PostgreSQL n’a pas prétendu avoir des procédures stockées. Les fonctions PL/pgsql ont été conçues à l’origine pour retourner des valeurs scalaires et étaient destinées à des tâches mathématiques simples et à une manipulation triviale de chaînes. Au fil des ans, PL/pgsql a développé un ensemble riche de structures de contrôle et a acquis la capacité d’être utilisé par les déclencheurs (triggers), opérateurs et index. En fin de compte, les développeurs ont été contraints d’admettre à contrecœur qu’ils avaient un système complet de développement de procédures stockées entrer leurs mains. En cours de route, l’objectif de PL/pgsql a changé de fournir des fonctions scalaires simplistes vers la fourniture d’une structure de contrôle complète. La liste complète de ce qui est disponible dans la version actuelle se trouve http://www.postgresql.org/docs/current/static/plpgsql-overview.html. Continuer la lecture de « Postgresql et PL/pgsql: une petite initiation aux fonctions »* __0
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Publié le 20 mai 201920 mai 2019 COMPRENDRE LES GÉOSERVICES WMS ET WFS Un géoservice est un moyen de mettre à disposition de l’information géographique à travers Internet. Aujourd’hui, la quasi totalité des produits permettant la mise en place et l’utilisation d’un géoservice sont basés sur des standards OGC. L’OPEN GEOSPATIAL CONSORTIUM, ou OGC, est une organisation internationale à but non lucratif fondée en 1994 pour répondre aux problèmes d’interopérabilité des systèmes d’information géographique (SIG). Les missions de ce consortium sont de regrouper tous les acteurs concernés afin de développer et promouvoir des standards ouvertsgarantissant
l’interopérabilité dans le domaine de la géomatique et de l’information géographique et de favoriser la coopération entre développeurs, fournisseurs etutilisateurs.
Les _standards et spécifications OpenGIS_ élaborés par l’OGC permettent de réaliser des systèmes et des services d’informations complexes et ouverts en favorisant des contenus et des services accessibles à tous et utilisables par tout type d’application. Nous verrons dans cet article les deux principales normes utilisées dans les géoservices: WMS et WFS. Continuer la lecture de « Comprendre les géoservices WMS et WFS »* __0
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Publié le 7 mai 201920 mai 2019 COMMENT INTÉGRER DES DONNÉES DWG DANS QGIS Le format DWG est un format binaire propriétaire d’Autocad. Quand on veut charger des couches dans QGis à partir de ce format, plusieurs problèmes se posent. QGis utilise la librairie GDAL pour lire/écrire les formats externes,tels que DWG.
Tout d’abord une précision: il ne faut pas confondre le format DWG et le format DXF. Souvent on trouve des références au format DWG/DXF ce qui est un abus de langage. Les deux formats sont différents. Le format DWG est le format natif du logiciel Autocad. C’est un format propriétaire et, en principe, soumis à licence. Le format DXF est un format d’exportation de données du logiciel Autocad. Il est public et non soumis à licence. Si vous disposez de fichiers DXF, aucun des problèmes soulevés dans cet article ne s’applique. Continuer la lecture de « Comment intégrer des données DWG dansQGis »
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Publié le 7 mai 20197 mai 2019 HOW TO INTEGRATE GEOTAGGED PHOTOS WITH ARCMAP In this article we will discuss how to create a layer of points with ArcMap containing positions and links to » geotagged » photos . Geotagging is to specify the GEOGRAPHIC COORDINATES photos by changing their data (or _tags_) EXIF . EXIF (Exchangeable Image file format) of a photo includes information such as the camera type, date and time ofshooting etc …
Continuer la lecture de « How to integrate geotagged photos withArcmap »
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Publié le 4 avril 20195 avril 2019 ARCGIS <-> QGIS. HOW TO SHARE DATA? More frequently we have a cohabitation of ArcGis with QGis. We keep ArcGis for heavy operations while QGis is used for lighter work , even if QGis is quite capable of assuming much more than that . Free , easier to handle, QGis is more used for portable applications. But there’s always the possibility of sharing the data between these two software . Towork properly with ArcGis we use geodatabases, but it is not possible to access such data from QGis. Therefore, we choose to export a shapefile that it is easily accessible by both software . Except that this specific format, available for more than 30 years does not pose many problems. In this article, we will discuss, a quite unknown option, the use of databases SpatiaLite databases, to communicate between both software . If you want , first of all, to know why it’s worth using SpatiaLite instead of a shapefile, go directly to the paragraph Why not ashapefile?
. And
afterwards, return here. Continuer la lecture de « ArcGIS < -> QGis. How to share data? »* __0
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Publié le 28 mars 201928 mars 2019 SPATIAL-TEMPORAL CUBE WITH ARCMAP AND ARCSCENE: POSSIBLE OR NOT? We have followed during the two latest articles ( The Spatial-TemporalCube
of ArcGis : 1- discovery , The spatial-temporal cube of ArcGis : 2 hot spots and cold spots ), an example for the building and visualization of a spatial-temporal cube with ArcGis Pro 1.0. We will discuss here how to do the same without ArcGis Pro, but using ArcMap and ArcScene 10.3. To answer the question asked in the title, is it possible or not, we will answer affirmatively , but at what price? As for the first part , building the cube, it is possible with ArcMap. The 3D visualization of the cube, even if this is not documented in the ESRI documentation, it is possible with ArcScene. Let’s take a look at all the obstacles to overcome , because it’san obstacle race!
Continuer la lecture de « Spatial-temporal cube with ArcMap and ArcScene: possible or not? »* __0
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Publié le 21 février 201921 février 2019 CRÉER UNE CARTE DE LOCALISATION AVEC QGIS 3.4 Les cartes de localisation permettent une vision plus globale de la zone d’étude représentée sur la carte principale Le principe est très simple: ce sont deux cartes en une seule mise en page. La carte de localisation aura une caractéristique particulière: on figera l’étendue, les couches affichées et la symbologie de ces couches une fois pour toutes. La seule variable sera le rectangle d’emprise qui, lui, est géré par QGis lui-même. Pour commencer, cliquez sur le menu _PROJET->NOUVELLE MISE EN PAGE_ ou ouvrez le gestionnaire de mise en page et créez une nouvelle mise enpage.
Dans la fenêtre de mise en page, ajoutez la carte principale (menu Ajouter un élément -> Ajouter carte) et la carte de localisation(idem)
Notez alors que la carte principale est nommée _CARTE 1_ et la carte de localisation _CARTE 2._ Vous allez commencer par la définition de la carte de localisation: 1- dans la fenêtre cartographique de QGis, zoomez le contenu de la fenêtre au niveau que vous souhaitez voir dans la carte delocalisation.
2- affichez seulement les couches que vous souhaitez voir dans la carte de localisation en désactivant l’affichage des autrescouches.
3- Modifiez, si nécessaire, la symbologie des couches visibles. Par exemple, l’épaisseur des traits est généralement plus fin pour la carte de localisation que pour la carte principale. 4-Vérifiez dans le gestionnaire de mise en page que le résultat correspond à vos souhaits. Pour cela, en ayant sélectionné la carte 2, cliquez sur _MISE À JOUR DE L’APERÇU _dans le panneau _PROPRIÉTÉS PRINCIPALES_ Dans le panneau _COUCHES_, cochez les cases _VERROUILLER LES COUCHES_ et_ VERROUILLER LE STYLE DES COUCHES_. Pour assurer qu’il n’y aura pas d’autre modification, cochez la case de verrouillage de carte 2 dans la fenêtre _ÉLÉMENTS_. Votre carte de localisation est configurée. Vous allez maintenant vous occuper de la carte principale. Mettez la en forme (zoom, symbologie, etc…) Une fois terminée la mise en page de la carte principale, il ne vous reste qu’à relier les deux cartes pour que la carte de localisation affiche l’emprise de votre carte principale. Pour cela déverrouillez la carte 2, cliquez sur elle pour la sélectionner, ouvrez le panneau _APERÇUS _de votre carte delocalisation.
Cliquez sur le bouton + pour ajouter un aperçu dans la liste d’aperçus. Il sera nommé _APERÇU _1. Pour paramétrer l’aperçu, il faut indiquer quelle emprise il faut afficher. Dans _CADRE DE LA CARTE_, sélectionnez _CARTE 1_ Vous pouvez modifier le style de l’emprise (couleur, contour, etc) en ouvrant le _STYLE DE CADRE_ A partir de ce point, si vous changez l’emprise de la carte principale, l’emprise affichée sur la carte de localisation sera modifiée automatiquement pour la représenter.* __0
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* QGis 3.8 et GRASS 7: les traitements affichent une erreur « cet algorithme ne peut pas être lancé » * Une fonction PL/pgsql pour l’analyse exploratoire de données spatiales avec des polygones de Voronoï * QGis 3.8, HotSpot Analysis Plugin et PySal * Postgresql et PL/pgsql: une petite initiation aux fonctions * Comprendre les géoservices WMS et WFSMOTS CLÉS
2.12() 2d()
3D()
1943()
agrégation()
agrégation
floue()
altération linéaire()américaines()
analyse
exploratoire()
analyse spatiale()
animation()
arcbrutile()
arcgis() arcgis
pro()
archydro()
arcmap()
attribut()
bassin versant()
bivariée()
carte() cartes()
champs()
classification()
compactage()
coordonnées()
correction()
critères()
cube() d8()
données gratuites()dégradé()
erreur() esri()
excel()
export()
fond de carte()
france()
geocodage()
geodatabase()
geoserver()
geostatistical analyst()geostatistiques()
geotag()
google() google
earth()
géographique()
géométrie()
géométries()
hydrologie()
image()
image analysis()
images()
import()
installation()
interpolation()
iterateurs()
itinéraire()
jointure()
jointure
spatiale()
kml()
lambert()
landsat()
licence()
logique floue()
marines()
mfd()
migration()
mise en
page()
mnt() model
builder()
modéleur graphique()ndvi() nord de
guerre()
openlayers()
openstreetmap()
openstreetmaps()
pdf()
pgrouting()
photo2shape()
photos()
plugin()
polygones()
postgis()
postgresql()
pro()
projection()
projet()
prévisions()
python()
qgis()
qgis 3()
raster()
requête sql()
rho8()
script()
shapefile()
south italy()
SpatiaLite()
suppression()
surface()
svg()
symboles()
table()
tables()
temps()
terrain()
tin()
toolbox()
traitements()
tutoriel()
utm()
validation()
vecteur()
version()
Voronoï()
wfs()
wms()
zéro IGN69()
édition()
élévation()
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COMMENTAIRES RÉCENTS * Atilio Francois dans QGis * Di Stefano dans QGis * Gérard maury dans Comment créer une version portable de QGis 2.8 * Atilio Francois dans QGis * Di Stefano dans QGis Politique de confidentialité Fièrement propulsé par WordPress Confidentialité et cookies : ce site utilise des cookies. En continuant à naviguer sur ce site, vous acceptez que nous enutilisions.
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