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I downloaded these DEM files, http://www.dgadv.com/srtm30/ srtm30 globe. I open the DEM files in Multispec. Some of them are black& white, some are automatically grayscale. How do i get them all in grayscale? (attaching image to explain) Thank you!!!

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I'm wondering if you can try the answer seen here: gis.stackexchange.com/a/10408/1297 and see if it helps any. – SaultDon Jun 8 '12 at 18:31
Hi SaultDon, yes i have did some experiment on photoshop; adjusting levels, brightness/ darkness does help abit. Thank you for your suggestion! – Anna Jun 8 '12 at 18:49

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Well, i did it in Qgis. Import srtm data, then properties-->colormatp=gray, make sure to set current to stretch to minmax. Apply. Then you export as image from file menu.

Good enough?

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