[gdal-dev] gdalwarp and mosaic

[DmitriyS]

Hello, dear developpers. I have one question. I wish to create mosaic image
by the next way. In my output folder threre are two images. the first image
is a mosaic image, and it is created by the command:
gdalwarp.exe -of GTiff -s_srs "+proj=utm +ellps=WGS84 +zone=31 +units=m" 
"E:\bug\mosiac\image_1.tif" -overwrite "E:\bug\mosiac\merge.tif" 

Then I have to append the second image (without overwriting) to the first
one (merge.tif) using next command:
gdalwarp.exe -"E:\bug\mosiac\image_2.tif" "E:\bug\mosiac\merge.tif".
The output window tells that's ok, merge.tif is done,  and does not signal
any mistakes. However as result image_2.tif is not appended, merge.tif has
no changes after this command execution.
Can you say what I should do to append an image to existing image(file)?
Best regards, Dmitriy.
 



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