[GRASSLIST:5663] Large dataset questions

[Jose Luis Gomez Dans]

Hi!
I have a set of files of x,y,z,smooth data points. The
files are large 
(there are around 45 million points in total). I would
like to use 
these data set as an input to v.surf.rst, with a given
tension 
parameter, and to use each record's smooth column
(i.e., it's 4th 
column) as a smooth factor in the option smatt. I am
using Debian, so I 
have a choice of grass 5.0.3 (official) or 6.0beta2
from DebianGIS 
(well, I could always compile from source, but...). I
have thus far 
used the beta2 version (and 5.7 on another computer,
but that's another 
story). My problems are probably to do with my poor
understanding of 
GRASS, but I cannot load the input files. To read them
in, I use the 
following command:
v.in.ascii input=<input> output=<output>  x=1 y=2 z=3
cat=0
Maximum input row length: 36
Maximum number of columns: 4
Minimum number of columns: 4
column: 1  type: double
column: 2  type: double
column: 3  type: double
column: 4  type: integer
 (my files are x|y|z|smooth, so it's detecting
everything OK)

This either results in some error at some particular
point (which looks 
fine), or:
 v.info glas
ERROR: Cannot open old vector output at mapset on level 2

I don't understand why this happens? Can anyone give
me any hints on how 
to load the files?

Many thanks!
José

-- 
Jose L Gomez-Dans, Research Assistant
Bristol Glaciology Centre, Geographical Sciences/CPOM
University of Bristol, Bristol, UK



	
	
		
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