Lecture
Geometric spatial queries: summary
Description
This lecture covers the use of spatial queries in QGIS, including selecting spatial objects based on conditional queries using a SQL-like syntax. It also explores the extraction of properties of geometries stored in a database, such as reference systems, format conversion, and graphical retrieval of spatial objects. Additionally, it delves into functions for extracting characteristics like type, envelope, and numerical properties like coordinates and lengths.
Official source
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