s.surf.tps/s.surf.2d

[Bob Abrahart]

Hi folks:

I am using s.surf.2d to create a DEM for hydrological modelling 
purposes. The custom in such cases is to multiply the point data 
by 100, to turn metres into centimetres, and then do the required
interpolation.  Working in centimetres gives the final product
enhanced vertical resolution ie. less flat areas (but not in all
cases improved accuracy).

In s.surf.2d there is an option to multiply the point elevation data 
by 100 - which is great for elevation modelling purposes.  However, 
I assume that this action will have an adverse affect on the other 
outputs options, such as slope, tcurv, pcurv, mcurv, etc.  I could of 
course create a "special region" wherein a couple of extra zeros has 
been added to the original coordinates - then ship the output data back 
into the "original region".  But this would be a somewhat rough and ready 
solution.

Has anyone got any better ideas?

Cheers.


Bob Abrahart

MEDALUS II
School of Geography
University of Leeds
Leeds LS2 9JT

Tel:   +44 (0)532-336750
Fax:   +44 (0)532-333308

Email: bob at geog.leeds.ac.uk