New answers tagged

1

Load your shapefiles into R as SpatialPolygonsDataFrame objects - lets call them p1 for the year 2000 and p2 for the year 2010. Drop any rows in p1 with fips codes that aren't in p2 - these would be county fips codes that don't exist any more, so their geometry has changed. Also, drop any rows in p2 that don't have a fips code in p1. These are new fips ...



Top 50 recent answers are included