[OSRS-PROJ] proj4 parameter question regarding UTM
Ed McNierney
ed at topozone.com
Fri Feb 6 15:46:26 PST 2004
Peter -
Those are NOT the correct values for those coordinates projected in UTM.
Your longitude of -143 degrees isn't even close to zone 10 - it's in UTM
zone 7. The Northing and Easting you report seem approximately correct
for the zone 7 coordinates of that point, so you should simply change
your proj command line to specify zone 7.
- Ed
Ed McNierney
President and Chief Mapmaker
TopoZone.com
-----Original Message-----
From: pw [mailto:p.willis at telus.net]
Sent: Friday, February 06, 2004 6:32 PM
To: osrs-proj at remotesensing.org
Subject: [OSRS-PROJ] proj4 parameter question regarding UTM
Hello,
I have been attempting to use proj to project latlons to utm.
In testing on the command line I get incorrect utm coordinates based on
the latlons that I am providing.
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Question A.) (in case of a scaling problem)
What scale does does proj project latlons to.
eg. UTM feet, UTM meters
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Question B.) (in case my parameters are wrong)
When using proj on the command line I am entering the following:
proj +proj=utm +ellps=WGS84 +zone=10
Is that correct?
/*......................................................................
....
........*/
Here is what I get at the command prompt:
I enter my lons and lats at the prompt.
-143.228 55.380
proj returns incorrect values
-771781.86 6325041.42
Actual correct utm values for this coord WGS84 utm zone 10 (north):
358851.385 east 6139389.448 north
/*......................................................................
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Thanks for any help,
Peter
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