Just to followup for others, don't need help any longer.  I've mastered
PBSmapping's PolySet, I believe, that that's solved a number of these
problems, including the business about having to write out and back in.
Same usage manipulates world maps to create appropriate duplicates.
PolySet is documented in the PBSmapping code.  For isolated points,
check out the more rudimentary EventData objects.

Thanks for intents to assist.  

 - Jan,
     Akamai.

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