On Thu, 29 Nov 2007, Rick Reeves wrote:
> Hello:
>
> If one has a polygon shapefile of the USA and a point shapefile of USA
> cities (both in geographic coordinates), and the point shapefile
> includes demographic attributes for each city, what would be the best
> way to create a contour map of
Hello:
If one has a polygon shapefile of the USA and a point shapefile of USA
cities (both in geographic coordinates),
and the point shapefile includes demographic attributes for each city,
what would be the best way to create
a contour map of one of the attributes that overlays the polygon
