This is a great listserv!
Chaitanya using a vrt worked so thank for that tip. Also, it must be the
case as Jukka says that img isn't holding the control points. But as
suggested a GeoTiff (and VRT) work fine.
Thanks so much for your help.
Cheers,
Derek
On 5/25/2012 7:25 AM, gdal-dev-requ...@lists.osgeo.org wrote:
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Today's Topics:
1. Re: georeference and project a jpeg (Chaitanya kumar CH)
2. Re: georeference and project a jpeg (Jukka Rahkonen)
3. Re: ogr2ogr shapefile to mapinfo tab: no SRS.
(Frans Knibbe | Geodan)
4. Re: ogr2ogr shapefile to mapinfo tab: no SRS.
(Luca Sigfrido Percich)
5. Re: ogr2ogr shapefile to mapinfo tab: no SRS.
(Frans Knibbe | Geodan)
6. Re: ogr2ogr shapefile to mapinfo tab: no SRS.
(Frans Knibbe | Geodan)
----------------------------------------------------------------------
Message: 1
Date: Fri, 25 May 2012 12:30:56 +0530
From: Chaitanya kumar CH<chaitanya...@gmail.com>
Subject: Re: [gdal-dev] georeference and project a jpeg
To: jdmorgan<jdmor...@unca.edu>
Cc: gdal-dev@lists.osgeo.org
Message-ID:
<CAMKgpObbfjDbRUQCdq=narfp8l8vrniy9g13k4t0m8k2ldg...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Derek,
Please provide the gdalinfo output of the img file.
Also, try this:
Create a vrt file instead of a HFA using the same gdal_translate command.
See if gdalwarp works with the vrt file.
On Fri, May 25, 2012 at 7:17 AM, jdmorgan<jdmor...@unca.edu> wrote:
Hello,
I am attempting to georeference and project a jpeg image using only gdal
tool. I have georeferenced the jpeg using the following command:
gdal_translate -a_srs EPSG:102719 -of HFA -gcp 0.0 0.0 -82.5586187839508
35.59414007259327 -gcp 0.0 410.0 -82.55858659744263 35.5937998255945 -gcp
520.0 0.0 -82.55741715431213 35.594340730401775 -gcp 520.0 410.0
-82.55728840827942 35.5940266570877 NCDCLogo.jpg NCDCLogo.img ****
** **
The command run fine and produces a img file however it does not line up
with similarly project layer per the gcp’s. When I check the projection
information the file shows to be unprojected. Further, when I attempt to
project the resulting raster with gdalwarp I get the following errors:
“There is no affine transformation and no GCPs.�
Any pointers here would be greatly appreciated.
Thanks,
Derek
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Derek @ NEMAC
http://nemac.unca.edu
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