[GRASS-user] profile and tangential curvature negative XY coordinates

[Micha Silver]

On 06/15/2010 08:17 AM, Edgar Pimiento wrote:
> Hello all,
>
Welcome:
> I am a new GRASS 6.4 user (1 month). I want to calculate topograhic 
> parameters (profile and tangential curvatures) from a 1-m DEM that has 
> negative XY coordinates (EPSG2446) north -210,000 south -213,000 west 
> -60,500 east -55,500. Resulting rasters have extremely large values.
>
SO your region is 3 km X 5 km, or 3000 m X 5000 m (I'll assume you have 
the region resolution set to 1 m?? Check this with g.region -p)
In this case you'll be working with a raster of 15,000,000 cells. It's a 
large region by not unreasonable size. With any recent computer you 
should be able to do profiles and curvature.
What are the values that you say are "extremely large"??

> Is it because of spatial reference? is there a workaournd?
>
> I appreciate any comment. Thank you,
> Edgar Pimiento Chamorro
> e_pimiento at yahoo.com
>
>
>
>
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-- 
Micha Silver
Arava Development Co. +972-52-3665918
http://surfaces.co.il


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