qgis-impl-vector-analysis

Use when performing spatial analysis on vector data: buffering, clipping, intersecting, dissolving, or joining layers. Prevents geometry operation failures from NULL geometries and wrong CRS combinations. Covers spatial queries, overlay operations, attribute/spatial joins, field calculations, and vector output. Keywords: vector analysis, buffer, clip, intersect, dissolve, spatial join, overlay, QgsGeometry, QgsVectorFileWriter, find nearby, within distance, overlap analysis, combine layers.