Hi,<br><br>I am new to this area and I have some experience programming on Python.<br><br>I tried to use gdalwarp with no much success to compose satellite Geotiff images so far. I would like to
use it but I can't find explanations on how to use many of the options.
<br>I wouldn't mind using gdal_merge.py if I can get the correct results.
<br>I need to stitch together satellite images received from various
satellites that have been converted into GeoTiffs. The composite image needs to keep same
resolution of original images. So, I tried first to use gdal_merge.py,
but since many areas from original tiffs are black, I keep getting
portions of some satellite pictures covered by the black portion of
their neighbor maps. Besides, the colors in the final image look like
very fainted compared to the original images. <br><br>I can't figure out how to solve this two issues neither with gdal_merge.py nor with gdal_warp.<br><br>This is what I used for gdal_merge.py:<br>gdal_merge.py
-o $ofn -v -n 0 AS_*.tif EP_*.tif EU_*.tif US_*.tif IO_*.tif where
$ofn= output file name. Only one input image per region is available
at any given time. I used the * to avoid having to write a very long
portion of the map name which includes a date/time stamp.
<br><br>This is what I used for gdal_warp:<br>
gdalwarp -of GTiff EP_*tif $ofn<br>gdalwarp -of GTiff US_*tif $ofn<br>gdalwarp -of GTiff EU_*tif $ofn<br>gdalwarp -of GTiff IO_*tif $ofn<br>gdalwarp -of GTiff AS_*tif $ofn<br><br>I
get errors after the second image is
warped. I did try sizing the output image using "-tr <out_size>"
with no luck
<br>out_size=12000 800 since each image was 2400 800<br><br>Does anyone know where I could find examples using all the options for merge_gdal.py and gdalwarp? I visited the obvious gdal sites I found while searching with Google.
<br><br>Thanks<br><br><br>