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gfong

Pre-processing dem for visitor

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i would really like to be able to put my dem to use in visitor, but am having some problems with wilbur.

i can open my dem file in wilbur, but when i try to save as tga or 8-bit bmp, it still saves as dem. also, when i try to view the terrain as a grayscale heightmap, the sea becomes black and the land completely white (no elevation information).

can someone provide insight as to what i'm doing wrong?

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i figured it out... the dem i was using had all the sea bed height defined as a really "large" negative number (-30000) and that was screwing up the grayscale heightmap conversion.

i solved it by going to surface>>point process>>replace to effectively raise the sea bed (base value = -30000; variance = 1; new value = -10).

i am now able to view it as a grayscale heightmap, and am able to save it as a tga file with no problems.

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