I am using GDAL tool to merge many geotiffs and get the following result:enter image description here

how to fill the no data and change the no data value to 1?

  • 3
    From the docs gdal.org/gdal_merge.html (I assume you're using merge although not stated in your question) you should be able to use -init 1 -n 1 -a_nodata 1 to set various fill/nodata options. Commented Aug 8, 2017 at 3:27

1 Answer 1


I solved my problem, i convert this geotiff to ascii file first and change the values, then convert ascii file back to geotiff.

  • 1
    gdal_translate is able to set a NODATA value without the need to convert to another format. It is also accessible within the QGIS Raster menu.
    – AndreJ
    Commented Aug 9, 2017 at 5:37

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