Geographic Information System
Fix invalid geometries
Learn how to fix geometry with Self-intersection errors in PostGIS using functions like ST_MakeValid, ST_IsValid, and more. A practical guide to ensuring correct topologies in your GIS data.
postgis
Posts related to the tag postgis
Geographic Information System
Square circumscribed to the polygon
Find out how to create a square bounding box for polygons using PostGIS, with practical examples on the Municipalities of the Metropolitan City of Naples.
Geographic Information System
Remove duplicates from a vector
How to eliminate duplicates in a linear vector using SQL and the Topology Checker plugin in QGIS. A practical case with OSM and PostGIS hydrographic data.
Geographic Information System
Shapefile or cartographic DB: which to choose?
Comparison between shapefile and geodatabase (cartographic DB), exploring the differences, advantages and use cases to choose the best solution based on the amount of data and processing required
Geographic Information System
Vectors: A type of real-world representation in the GIS field
Introduction to the concept of vector in GIS, exploring the relationship between vector graphics, mathematical vectors and geometric primitives (points, lines, polygons) in GIS.
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