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Problem in Making Maps with Global Mapper

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I am using the 2-Minute Gridded Global Relief Data (ETOPO2)
to make simple figures for a couple of popular geology articles.
The source of the data, which I am using is:

http://www.ngdc.noaa...esignagrid.html .

I saved the data as in both binary raster format and ASCII
raster formats. Then I used Global Mapper 6.0.1 to make
both shaded relief maps and contour maps as bases for
the figures, which I am making. The problem comes when
I make colored, shaded relief maps using the Global
Mapper shaders, including ones created by me. For some
reason, regardless of how I set the color-elevation scheme
for any of the shaders, anything below sea level comes
out as the same series of shades of blue.

Does anyone know how I can override this color scheme
and set up my own color scheme for elevations below sea
level? No matter how I edit a specific shader using
"Configuration-Shader Options-Edit", the same set of
"blues" appear regardless of the specific shader being

Best Regards,

Baton Rouge, LA



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Open your project and go to Tools>Configure>Vertical Options tab. The water display section provides control over how water is handled.

I've got v6.09 so it should be the same.





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Maybe this is obvious, but have you peeked at the data? Could it be that it was delivered as a un-signed 16-bit integer (values from 0 - 65536), then you need to subtract 65536 from all values above 30000 or something.
Hugo Ahlenius
Nordpil - custom maps and GIS

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