I am using only free, open source tools. I have two shapefiles: a shapefile of voting precincts and a shapefile of census tracts. I want to know: which voting precincts fit inside which census tracts? What is the mapping vocabulary describing what I am trying to answer?
I am trying to know which polygons from the precinct shapefile are bounded by which polygons from the census shapefile? Is that right? How do I answer that question programmatically? What tools would I use? I have a vague sense that I could do this in PostGIS -- but don't really know. Also, is it possible in QGIS?