[GRASS-user] re: r.out.gdal Terragen format

Markus Metz markus.metz.giswork at googlemail.com
Mon May 17 04:12:36 EDT 2010

patrick dolan wrote:
> Hello,
> I'm attempting to export a DEM to a terragen file and I've run into the
> following error message.
> ERROR 1: Inverted, flat, or unspecified span for Terragen file.

Maybe the span of elevation values was not specified?
Set the MINUSERPIXELVALUE option (a float) to the lowest elevation of
your elevation data, and MAXUSERPIXELVALUE to the highest.

> There isn't a great deal of lit in the manual regarding terragen exports,
> and I'm wondering if anyone has any personal experience doing it, or knows a
> better method.
> Patrick Dolan
> Dept. of Anthropology
> Washington State University
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