I am working on mapping San Blas, Nayarit, Mexico
http://www.openstreetmap.org/?lat=21.542&lon=-105.2876&zoom=14&layers=B000FTF
and encountered an issue that I feel requires some discussion.
San Blas is surrounded by extensive mangrove forests. The original coastlines
that were drawn, obviously using the Yahoo imagery as a source, has placed the
coastlines on the landward side of these mangrove forests.
My opinion is that this is inappropriate for two reasons. 1) I think of
coastline as the boundary of the ocean--mangrove forests, though wet, are
clearly not part of the ocean, and 2) anthropomorphically, the use of the
mangroves is completely different than the use of the use of the
ocean--mangroves are exploited on foot and the ocean requires boats.
My opinion about the estuaries that penetrate the mangrove forests is less
clear, though I tend toward classifying them as inland water features with the
coastline boundary being placed at the sandbars at their mouths.
Is there any existing discussion related to this topic that somebody could
point me to? If not, how to proceed?
Cheers,
doug brown
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