Raster with height in the 4th channel
kajsada
Global Mapper User
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
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
-
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 -
Ok, thank you for the quick reply.
Is it something that could be implemented in the future?
Kind regards
Kajsa -
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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