I'm trying to combine two shapefiles using zipmaps5 <- spRbind(zipmaps1,zipmaps2)
and getting the following error message
Error in spRbind(as(obj, "SpatialPolygons"), as(x, "SpatialPolygons")) :
non-unique polygon IDs
Does anyone know how I can get rid of duplicate polygons in a shapefile?
thank you!
[[alternative HTML version deleted]]
_______________________________________________
R-sig-Geo mailing list
R-sig-Geo@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
