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

This example "looks" very similar to an old sas/graph example, 
but I have totally rewritten it using different technology.

The original example used a macro to do the "hammer" projection,
but in my example I use "proc gproject" (and the undocumented
hammer projection that is supported in gproject). 

In the original example, each longitude/latitude rectangle in 
the grid was done as a gmap area (overlapping with/behind the
real land areas) - overlapping land/map geometries is a "bad"
thing in general, so I did my version using annotate to draw
the long/lat grid behind the map.

Also, in my annotated long/lat grid, I add a html title= charttip
showing the long/lat value, and an href= drilldown to give you
a mapquest map of the area when you click on it.

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