Raster with height in the 4th channel

kajsadakajsada Global Mapper UserPosts: 13
edited March 2012 in Technical Support
Hi!

I am looking for a way to generate a raster file with 4 channels, where RGB values are stored in the first 3 channels and the height value in the 4th channel, extracted from an elevation model. Preferably in ECW-format. Is this possible to do in GlobalMapper? I am using version 11 at the moment.

Best regards
Kajsa Dahlberg

Comments

  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited March 2012
    Kajsa,

    It is not possible to create a 4-channel (other than transparency) ECW in any version of Global Mapper. In newer version of Global Mapper you could export a 4-channel JPEG2000 or GeoTIFF (or a couple of other formats), but the 4th channel has to be from a loaded imagery layer and can't come from a terrain layer, except as the color representation of the layer.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • kajsadakajsada Global Mapper User Posts: 13
    edited March 2012
    Ok, thank you for the quick reply.
    Is it something that could be implemented in the future?


    Kind regards
    Kajsa
  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited March 2012
    Kajsa,

    We would first have to have a version of the ECW library that supports such a thing. Our ECW support is from a 3rd-party library (actually everyone uses the same library for ECW support) so we can only do what their library allows. This would be a non-standard format anyway, could you possibly just use 2 separate files, one with imagery and the other with the associated terrain?

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
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