Change coordinate system on multiple images

STH
STH Global Mapper UserTrusted User
edited February 2008 in Suggestion Box
In the Overlay control Center you can select a layer (image) and choose Options and change the Projection in the projection-tab. However when selecting 2 or more images this is not possible. You have to manually unload and load them again and set the correct Projection.

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  • global_mapper
    global_mapper Administrator
    edited February 2008
    Are you wanting to correct the projection for multiple layers at a time or just reproject loaded layers to a different projection? If you are wanting to reproject the layers, you just need to change the projection on the Projection tab of the Configuration dialog. If you are wanting to correct the projection for loaded file (a much less common operation), you are correct that you can only do this one at a time for now.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Support
    support@globalmapper.com
  • STH
    STH Global Mapper User Trusted User
    edited February 2008
    I want to "correct the projection" because it was set wrong upon loading the images.
  • STH
    STH Global Mapper User Trusted User
    edited February 2008
    A workaround is to:

    1. Load all GeoTIFFs
    2. Change coordinate system in Control Panel - Options - Coordinate system for ONE of the files.
    3. Save the GlobalMapper Workspace
    4. Edit the GlobalMapperWorkspace you created and find the string: PROJ_NAME=" - for instance: PROJ_NAME="UTM_ZONE33_WGS84"
    5. Replace all: TYPE="GEOTIFF" with TYPE="GEOTIFF" PROJ_NAME="UTM_ZONE33_WGS84 (ofcourse you have to replace this with your own correct coordinate system.

    Now when you load the workspace again all files will have the same new coordinate system, different from the one embedded in the GeoTIFF. All you have to do is Batch reproject/export the images and the new information will be written to the GeoTIFF-file

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