Do you want to take your lat/long coordinates, and plot dots (or markers) on a map at those locations, and have the colors of the dots represent the data? (for this you could use Proc Gmap, and annotate the points)
Or, do you want to figure out which region the lat/long points are in, and then aggregate (average, etc) the values within each region, so you can produce a map showing the regions, with the region area colored by the aggregate (average, etc) values? (for this, you could use Proc Ginside to determine which region the lat/long points are in)
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