Use when planning a spatial analysis workflow, choosing between analysis approaches, or chaining multiple operations. Prevents wrong analysis method selection and suboptimal workflow ordering. Covers vector vs raster decision trees, processing algorithm selection, workflow chaining, CRS/format guidance, and MCP server…
Use when generating complete maps from data: loading, styling, composing layouts, and exporting. Prevents poor cartographic choices and empty map exports. Covers the full map pipeline: data loading, symbology selection, labeling, layout composition, atlas generation, and export. Keywords: map generation, create map…
Use when creating QGIS projects, understanding PyQGIS architecture, or reasoning about the QGIS data model. Prevents mixing standalone script initialization with plugin context, and threading violations. Covers Qt-based architecture, 5 core modules, project lifecycle, layer model, provider system, and QGIS 4.0 Qt6…
Use when handling coordinate reference systems, transforming coordinates, or measuring distances/areas. Prevents silent data corruption from wrong CRS assignment and lat/lon coordinate order confusion. Covers CRS creation, coordinate transforms, datum transformations, distance measurement, and EPSG database. Keywords…
Use when loading data into QGIS, constructing layer URIs, or choosing between data formats. Prevents URI format errors that cause silent layer loading failures. Covers 12+ data providers, URI construction patterns, vector/raster/mesh formats, and GeoPackage best practices. Keywords: data provider, QgsDataSourceUri…
Use when diagnosing data loading failures, invalid layers, or provider connection errors. Prevents silent failures from unchecked layer validity and incorrect URI formats. Covers invalid layer detection, URI format errors, encoding issues, GeoPackage locking, connection failures, and performance. Keywords: invalid…
Use when diagnosing CRS/projection errors, coordinate mismatches, or datum transformation issues. Prevents silent data corruption from wrong CRS assignment and coordinate order confusion. Covers wrong EPSG selection, lat/lon vs lon/lat, datum warnings, on-the-fly reprojection pitfalls, and fix patterns. Keywords: CRS…
Use when creating 3D map views, configuring terrain, or rendering vector/point cloud data in 3D. Prevents performance issues from unoptimized point cloud rendering and incorrect terrain configuration. Covers Qgs3DMapSettings, terrain providers, 3D symbols, materials, camera/lights, and layout integration. Keywords: 3D…
Use when georeferencing raster images or vector data using ground control points. Prevents accuracy loss from insufficient GCPs and wrong transformation type selection. Covers GCP management, 7 transformation types, QgsVectorWarper, residual computation, and accuracy assessment. Keywords: georeferencing, GCP, ground…
Use when performing routing, shortest path, or service area analysis on road/transport networks. Prevents incorrect results from wrong edge direction assumptions and missing cost strategies. Covers QgsGraphBuilder, QgsGraphAnalyzer (Dijkstra), QgsVectorLayerDirector, cost strategies, and service areas. Keywords…
Use when connecting to PostGIS databases, loading spatial tables, or executing SQL from PyQGIS. Prevents connection string errors and plain-text password exposure in production. Covers QgsDataSourceUri, PostGIS layer loading (table/view/SQL), SQL execution, schema discovery, and authentication. Keywords: PostGIS…
Use when performing raster analysis: map algebra, terrain analysis, raster classification, or DEM processing. Prevents NoData handling errors and incorrect raster calculator expressions. Covers QgsRasterCalculator, DEM analysis (hillshade/slope/aspect), raster renderers, and GDAL processing algorithms. Keywords…
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.…
Use when loading WMS/WFS/WMTS layers, configuring XYZ tile sources, or setting up QGIS Server. Prevents URI format errors for OGC web services and server misconfiguration. Covers WMS/WMTS/WFS/WCS clients, XYZ tiles, QGIS Server, server filters, and OGC API features. Keywords: WMS, WFS, WMTS, WCS, XYZ tiles, OGC, QGIS…
Use when writing QGIS expressions for filtering, labeling, symbology, or field calculations. Prevents expression syntax errors and context misconfiguration. Covers QgsExpression parsing, evaluation contexts, field calculator, data-defined properties, and custom functions. Keywords: QgsExpression, expression, field…
Use when writing PyQGIS scripts, accessing features, editing layers, or performing geometry operations. Prevents edit session violations, threading crashes, and inefficient feature iteration. Covers 4 scripting contexts, feature CRUD, geometry operations, spatial indexing, background tasks, and basic symbology.…
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originalMIT
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: