GIS coaching for territorial management.
Understanding the different types of unions in GIS Spatial union is one of the fundamental operations in geomatics. It allows you to combine multiple layers or entities to produce new geometries or enrich attributes. However, behind…
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Starting with QGIS version 3.42, a subtle but powerful feature has been added to the context menu of vector layers: the “SQL Query…” option. This improvement provides a direct and user-friendly interface for running SQL queries,…
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This subject comprises two articles. The first deals with importing ENC S57 files into a Postgresql/postgis database. The second deals with setting up an automatic symbology equivalent to nautical charts. You can download all the scripts…
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In Article previous we have discussed some SQL functions for spatial processing . In this article we will see a function a little more complicated to put at work: the aggregation function for two layers of…
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We have already discussed the topic of geometry validation through a series of articles (in french): GIS tools for validation of geometries (1) Geometry validation GIS tools (2): Spatiality and PostGis Geometry validation tools (3): FME…
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