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The open source alternative to ArcMap, but not as industrial strength. It's a GUI for composing maps and doing simple analysis.
- Relative paths to layers: QGIS: File > Project Properties > General > Save Paths > Relative. Check.
- Create conditional labels in QGIS
- How to set custom projections (CRS) in QGIS (YouTube)
- Table Joins – A New Feature in QGIS 1.7:
- Spatial joins
- Delete columns in shape files with the essential "Table Manager" QGIS plugin
- View Web Mercator map tiles in QGIS
- Running Scripts in the QGIS Python Console
- Adding latitude and longitude columns to point geometry files: Vector menu > Geometry tools > Export/add geometry columns. Choose the layer to process. Set the export path/filename. Press go.
- TopoColour plugin - TopoColour uses graph theory to colour polygon layers. Furthermore it can save the adjacency as a DOT format file and create a layer showing the adjacencies.
- Color Brewer for QGIS - Directly tint code polygons in GIS application using the Color Brewer colors.
Be aware: These are for version 1.7ish. Might be fixed in newer versions.
- No warning column can't support value in editing session. Displaying desired out-of-rage value, then on save trashing it.
- "Original CRS" really means "Project's Active CRS (data frame)", not the theme's original CRS in #QGIS.
- QGIS project-on-the-fly breaks geo-processing (though it draws pretty)
- Merging SHPs in #QGIS doesn't match column names but rather column order.
- Seemingly no way to import PRJ file to set new CRS and no easy way to duplicate and modify existing CRS in the list.