| UTM WGS-84 projection with IDL? [message #38485] |
Thu, 11 March 2004 04:14 |
remkoxl
Messages: 5
Registered: March 2004
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Junior Member |
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Hi all,
At the moment I try to import my (ENVI) images into IDL. The binary
files are imported without problems with the OpenR and ReadU commands.
The final task is to output my images in publishable maps. So, I want
to add country lines etc. (with MAP_CONTINENTS, MAP_GRID).
The thing is that my original image is in a UTM projection (can be set
with the MAP_SET command), but the standard here is a Clark 1866
ellipsoid, while my image is in a WGS-84 (zone 26, Greenland). Does
anybody know how to derive the parameters defining the ellipsoid
(equatorial radius, eccentricity squared, scale on the central
meridian) for the WGS-84 projection, so that I can set the
ELLIPSOID-keyword right?
Many thanks,
Remko de Lange
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Remko de Lange
PhD student
School of Geography,
University of Leeds
LS2 9JT Leeds
United Kingdom
tel.: ++44 (0) 113 34 36638
fax.: ++44 (0) 113 34 33308
http://www.geog.leeds.ac.uk/people/r.de-lange/
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