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nmtoken
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srtm30 image: some are grayscale some are black & white

I downloaded these DEM files, http://www.dgadv.com/srtm30/ srtm30 globe. I open the DEM files in Multispec. Some of them are black and white, some are automatically grayscale.

How do I get them all in grayscale?

(attaching image to explain)

enter image description here

enter image description here

Anna
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