Click here to see the SAS code.
Click here to see the example.

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The original map was here:
http://216.27.39.101/Plan/NC_River_Basins_Map.htm

... it only had mouse-over text for the river basin names.

But the river basin names were printed in large text on the map,
therefore I didn't need that info in hover-text ... rather, I 
needed some other reference points, such as county names, and
city names.

Therefore I used SAS/Graph to overlay their image with a SAS/Graph
county map, and I used the gmap html= option to add html hover-text
with the county names.  I also annotated yellow dots at important
cities, and added hover text to them also.

I like my map (with all these reference points that I can relate to)
much better than the origianl map that only had river basin hover text
(and labels on the map that were too small to read).

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