GIS coaching for territorial management.
Spatial databases can contain millions of geographic objects. In some cases, a PostGIS query may take several seconds — or even several minutes — to execute. This problem often occurs when: In this article, we will…
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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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List partitioning in PostgreSQL/PostGIS is a declarative partitioning method that divides a large table into several sub-tables, according to the discrete values of a column (e.g. by region, type, year, etc.). This is particularly useful in…
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This article explores the fundamental concept of topology in GIS (Geographic Information Systems) and its application in the modeling and analysis of geospatial data. It examines in detail the different aspects of topology, such as spatial…
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We’ll take up the example covered in the article Eliminating overlays and gaps between polygons in a layer (with QGis and Postgis) to see the same type of solution when you don’t have a PostgreSQL/Postgis database.…
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For those unfamiliar with the joys of working with the French cadastre, you should know that if you have the opportunity to work with cadastral data corresponding to “Lieux-dits” (a subdivision of communes) you’ll find that…
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