[GRASSLIST:4777] Re: r.in.tiff: problems

[William K]

Probably because MacDEM saves a color TIFF - I think the defaults have 
a blueish color for either the zero elevs or nulls. (it's been a while 
since I used MacDEM)  Even if you could get it to save a grayscale 
tiff, you'd still have to deal with the nulls somehow.

A better way to bring in SRTMs into GRASS is directly, using r.in.gdal. 
Then use GRASS to patch them together.  There's been a few queries 
about it on the list recently - check the archives.  Maybe when I have 
time to figure out the new wiki I'll add something there.


On Nov 11, 2004, at 4:25 AM, lawrence moran wrote:

> Hi,
>
> Thanks to those who helped with my previous query- I'm now getting 
> somewhere!
>
> Next I'm trying to bring in some SRTM topographic data. I've used 
> MacDEM to merge 4 degree squares and exported these as a tiff with 
> world file. Using r.in.tiff, I get three bands (.r, .g, .b). However 
> band .r displays as null values, .g and .b display as greyscale.
>
> Any ideas what's going on?
>
> Thanks,
>
> Lawrence
>
>
-----
William Kyngesburye <williamk at mappingspecialists.com>
Mapping Specialists <http://www.mappingspecialists.com>

Don't Panic