[Qgis-user] Issues using Points in polygon with PostGIS layer

[Lee Hachadoorian]

I was using `Vector → Analysis Tools → Points in polygon` to count 
events in a hexgrid (created with MMQGIS). The point data came from a 
PostGIS layer. The layer has a query restriction and the filtered data 
set has ~230k points. When I run it, it just crashes (sometimes 
immediately, sometimes after several seconds). When I export the PostGIS 
layer to shapefile and run it, it works (although it takes ~2 hours to run).

Are there issues with using this feature with PostGIS layers? Is it the 
size of the dataset?

Best,
--Lee

-- 
Lee Hachadoorian
Assistant Professor in Geography, Dartmouth College
http://freecity.commons.gc.cuny.edu