GIS coaching for territorial management.
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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Among the different options to load data in Postgresql, we will see here the one that, in my opinion, is the easiest and fastest. We will simply use QGis and its Database Manager.
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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 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…
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If you start to feel tired of managing your data as shape files (this format dates back to the eighties!) and you yearn for a genuine database for your projects, most certainly, you will be looking…
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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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Following up a previous article (Débuter avec Postgres/Postgis ), we will address an introduction to Postgres/postgis database management. We will load a shapefile, connect and load the Postgis layer from QGis. The most suitable method to…
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