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Tag: sql

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Spatial analysis with SQL: 5- aggregation function (ArcGis Union)

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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  • PostgreSQL

How to rectify the geometry of a Postgis table

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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