I have taken a pdf of a map and managed to import it into my map using the QGIS geolocator. Now I want to convert the resulting raster layer to a set of polygons that match up with the existing vector layers. When I polygonize the raster layer, it's a mess.
Can someone get me started in the right direction?
Map with raster (w/ transparency)
Map with polygonized raster
Or is it easier to use the raster overlay to note by hand which of the small areas fall within the the respective raster's areas?