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RE:  Operational Navigation Charts (ONCs), Tactical Pilotage Charts
     (TPCs), Digital Chart of the World (DCW)
 
Can anyone shed any light on reference materials for ONCs/TPCs?
Has anyone used ONC/TPC data in their research?
What is their history?
How are they produced?
How often are they produced?
When have they been produced?
What can be said about their accuracy?
Has anyone have any gray literature on ONCs/TPCs?
What is the importance of the chosen features?
Why are some features updated and not others?
Why do TPCs exist for some regions and not others?
 
We are aware that ONCs and TPCs are the basis for Digital Chart of
the World (DCW). Are they also the basis for the Defense Mapping
Agency's (DMA) Arc Digital Raster Graphics (ADRG) data?
 
Does anyone have any experience with the DCW ROADs layer in regions
other than North America?
 
Please send to me, personally, if possible, and I will summarize.
This is being cross-posted to MAPS-L,IMAGRS-L,GIST-L, please pardon
me if you are associated with all of these. Thank you.
 
Peter Schlesinger
Woods Hole Research Center
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