mercator, robinsen projections
- To: mathgroup at smc.vnet.net
- Subject: [mg56104] mercator, robinsen projections
- From: Edward Peschko <esp5 at pge.com>
- Date: Fri, 15 Apr 2005 04:48:08 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
I was wondering if people had some pointers on how to translate Mercator
Latitude/Longitude points to Robinsen (or other projections.)
suppose I had a robinsen graph of the world, which is on a flat, 2D graph.
I'd like to 'pick points' off of this axis, and turn them into equivalent points
on a mercator graph. And I'd like to go vice versa.
Is there a simple, mathematica function or package that will do this, eg:
which takes the linear representation of Mercator
x == 0 => corresponds to zero meridian,
x == -1 => corresponds to -180 longitude,
y == 0 => corresponds to equator,
y == -infinity => corresponds to the south pole
and turns it into a latitude/longitude representation? Ultimately, I'd like to be
able to say something like:
to convert from the flat, Mercator version of a map to the Robinson coordinates,
to go the other way around.
There's got to be a projections package out there somewhere, or is this a
particular wheel I need to reinvent?
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