GIS coaching for territorial management.
If you import or create svg symbols to use in QGis you will noticed that the colour change options and outline of these symbols are disabled in QGis. In fact, these settings are hard-coded in the…
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Usually, all layers of geographic data have the description of the coordinate system. Unfortunately, this is not always the case. In general, the problem greatly increases with the fact that, usually, it is quite (or completely)impossible…
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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!…
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We have already discussed the geometry validation in a series of articles. Particularly, you can read the article The geometry validation tools (5) with QGis for the validation tools with QGis 2.8 Version 2.12 brings a…
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Wondering why discussing Intergraph Geomedia? It is true that in France it has an almost confidential diffusion. But it does not deserve this. Besides the fact that it has been the forerunner in many fields (the…
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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…
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After discussing the ArcMap tool ( GIS tools for validating geometries (1) ) and the tools Spatialite / PostGIS ( GIS tools for validating geometries (2): Spatialite and PostGIS) we will discuss the available tools when…
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In the previous article (GIS Tools for validating geometries (1)) we processed the Italian Communes layer (com2011.shp) with the ArcMap geometry checker. We did not detect any anomalies. Now, let’s load this layer into a Spatialite…
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You have already been faced with the problem of a field name that does not satisfy you . But as soon as data has been entered in the table it is no longer possible to modify…
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Management and treatment algorithms for GIS data are developed with the assumption that the geometry of the entities meets certain specifications. When the data processing algorithms deal with data that does not respect these specifications, the…
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