Help with v.support?

[Stephan Eickschen]

Hi Grassers-

I have a problem with the vector functionality of GRASS: I want to
create a land / sea mask from a coastline. I am using the "GSHHS -
Global Self-consistent, Hierarchical, High-resolution Shoreline
Database" (have a look at:
	http://www.soest.hawaii.edu/wessel/gshhs/gshhs.html )
I have managed to convert it using gshhstograss
(http://www.ned.dem.csiro.au/unrestricted/people/CoxSimon/software.html)
, moving the resulting files to $LOCATION/dig_ascii, $LOCATION/dig_att,
and $LOCATION/dig_cats, convert it to a binary vector file with
v.in.ascii. It "looks good" in the monitor. But when I try to run
v.support, the latter dumps core: here is what is printed to the screen:

*********** snip *******************************************************

selected file is [gshhs_f]
        1  -   Build topology information (Needed for digit)
        2  -   Edit the category file
        Enter a number <1-2>
        anything else to quit: 1

Do you want to snap nodes to other nodes within a threshold (y/n) [n]


    V.SUPPORT:ERROR(v.support):  Could not build vector file: 'gshhs_f'



Mapset <Synoptic> in Location <45W45E>
GRASS 4.1 >

*********** snip *******************************************************

Could it be that there is something missing in my file / directory
structure? Here is mine at $LOCATION:

*********** snip *******************************************************

WIND
cats
cats_dig
cell
cell_misc
cellhd
colr
dig
dig_ascii
dig_att
dig_cats
dig_geo
dig_plus
hist
site_lists

*********** snip *******************************************************

I attach the first 20 rows of the ascii file in $LOCATION/dig_ascii, and
the files in $LOCATION/dig_att and $LOCATION/dig_cats.

Does anybody have any suggestion what could be wrong or how I can build
my mask in another way from my coastline (I intend to use v.to.rast and
then build a mask with r.mask)

Thanks in advance!

Regards,

	Stephan

P.S.: I am running GRASS 4.1 on a SGI.

-- 
------------------------------------------------------------------------

Stephan Eickschen                     Tel. : +49 (0)251 83-34704
Westfaelische Wilhelms-Universitaet   Fax. : +49 (0)251 83-36100
Institute for Geophysics
Research Unit of Physical Glaciology  email: eicksch at uni-muenster.de
Corrensstrasse 24
48149 Muenster
Germany

------------------------------------------------------------------------
-------------- next part --------------
ORGANIZATION: 
DIGIT DATE:   Fri Apr 24 14:35:50 1998
DIGIT NAME:   eicksch
MAP NAME:     Global Shorelines
MAP DATE:     1996
MAP SCALE:    1
OTHER INFO:   
ZONE:         0
WEST EDGE:    -45.000000
EAST EDGE:    45.000000
SOUTH EDGE:   -90.000000
NORTH EDGE:   -60.000000
MAP THRESH:   0.0001
VERTI:
L 14733
 -68.925750 360.000000
 -68.916222 359.915333
 -68.910806 359.833583
 -68.907944 359.737806
 -68.906833 359.582278
-------------- next part --------------
L       359.915333      -68.916222         34          
L        38.275083      -69.556583      31961          
L        39.548861      -69.031222      44950          
L        39.444083      -69.399889      51070          
L        39.489944      -69.176250      77985          
L        39.649583      -68.974222      78034          
L        39.250528      -69.582194      91807          
L        39.458972      -69.203194      91810          
L        39.560806      -69.186889      91811          
L        39.575861      -68.944139     130818          
L        39.467944      -69.016917     130937          
L        39.611667      -69.048083     130944          
L        38.856250      -69.568056     130959          
L        39.492028      -69.069833     144895          
-------------- next part --------------
# 144895 categories
Global Shorelines

0.0 0.0 0.0 0.0
0:unknown
34:land
31961:land
44950:land
51070:land
77985:land
78034:land
91807:land
91810:land
91811:land
130818:land
130937:land
130944:land
130959:land
144895:land