knudby,<br><br>According to <a href="http://gdal.org/formats_list.html">http://gdal.org/formats_list.html</a> and <a href="http://gdal.org/frmt_various.html#Envisat">http://gdal.org/frmt_various.html#Envisat</a> you cannot get the projection information but will be able to read GCPs with GDALDataset::GetGCPs().<br>
<br><div class="gmail_quote">On Mon, Feb 22, 2010 at 5:40 AM, knudby <span dir="ltr"><<a href="mailto:knudby@gmail.com">knudby@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Hi, I'm trying to read AATSR data in ESA's N1 format. Supposedly gdal can do<br>
this, but when I open my files I get no projection or geotransform<br>
information. Is this a known issue, or am I doing something wrong. If I'm<br>
doing something wrong, can someone give me a quick tip on how to get the<br>
information out (Python please).<br>
<br>
A snippet of what I'm using now:<br>
<br>
import sys<br>
import string<br>
import os<br>
from osgeo import osr<br>
from osgeo import gdal<br>
from osgeo import gdalnumeric<br>
from osgeo.gdalconst import *<br>
<br>
source_image_file = "c:/aatsr/l1/aatsr_data.N1"<br>
source_image = gdal.Open(source_image_file, GA_ReadOnly)<br>
geotransform = source_image.GetGeoTransform() #Turns out empty!<br>
projection_reference = source_image.GetProjectionRef() #Turns out empty!<br>
projection = source_image.GetProjection() #Turns out<br>
empty!<br>
<font color="#888888"><br>
--<br>
View this message in context: <a href="http://n2.nabble.com/Reading-Envisat-AATSR-L1-data-N1-format-tp4609430p4609430.html" target="_blank">http://n2.nabble.com/Reading-Envisat-AATSR-L1-data-N1-format-tp4609430p4609430.html</a><br>
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</font></blockquote></div><br><br clear="all"><br>-- <br>Best regards,<br>Chaitanya kumar CH.<br>/tʃaɪθənjə/ /kʊmɑr/ <br>+91-9848167848<br>17.241582N 80.142635E<br>