[gdal-dev] Translating between UTM and Geographic

[Henneke, Amanda M]

Just to document the conclusion, I did figure out if I copied the datum shift grids and pointed my PROJ_LIB environment variable to that directory that seemed to fix the problem for me.

Thanks everyone for you assistance!  I really appreciate it!

Amanda M. Henneke
IG/DB Tools - TSS Capability Center

 
When One tugs at a single thing in Nature, he finds it attached to the rest of the world. -John Muir
  Please consider the environment before printing this e-mail.

-----Original Message-----
From: gdal-dev-bounces at lists.osgeo.org [mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Henneke, Amanda M
Sent: Wednesday, September 23, 2009 1:14 PM
To: Even Rouault
Cc: Steve.Toutant at inspq.qc.ca; gdal-dev at lists.osgeo.org; gdal-dev-bounces at lists.osgeo.org
Subject: RE: [gdal-dev] Translating between UTM and Geographic

Even-

Thanks!

I do get something different from you: -117 40.6527598726051 0 

I'm using FWTools 2.3.0, so is there something I can do then to fix this problem since I didn't build my own libraries?

Thanks,
Amanda


Amanda M. Henneke
IG/DB Tools - TSS Capability Center

 
When One tugs at a single thing in Nature, he finds it attached to the rest of the world. -John Muir
  Please consider the environment before printing this e-mail.

-----Original Message-----
From: Even Rouault [mailto:even.rouault at mines-paris.org]
Sent: Wednesday, September 23, 2009 1:05 PM
To: Henneke, Amanda M
Cc: Steve.Toutant at inspq.qc.ca; gdal-dev at lists.osgeo.org; gdal-dev-bounces at lists.osgeo.org
Subject: RE: [gdal-dev] Translating between UTM and Geographic

Amanda,

You didn't specify why you believe that the coordinates you get are not right.
Are you validating against another reference tool ? Could you give an example of input, the output you get and the output you expect.

Here's what I've tried with the gdaltransform utility (in latest FWTools 2.4.3 or with GDAL trunk):

Run : gdaltransform -s_srs EPSG:26711 -t_srs EPSG:4326 Enter and validate : 500000 4500000 I get : -117.000936113198 40.6526705145738 0

If you have built yourself Proj4 and you don't get the above results, a possibility might that you have not built it with support for datum shift grids.
See http://trac.osgeo.org/proj/ for more details.

Best regards,

Even
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