lat-lon vector data with v.in.ascii/v.support
mccauley at ecn.purdue.edu
Thu Jan 28 13:41:19 EST 1993
Duc Nygen (duc at comsearch.com) writes on 28 Jan 93:
>PNT_TO_AREA failed: (30.022011, -95.697998) (Category 502)
you may want to run v.digit (with the grass monitor) and ask
it to show which areas are not closed. (it's under Toolbox;
"o - Display Open area lines"). If you find an open area,
remember the general location, convert your cats/atts file
to a site list, and run 'd.erase; d.vect file1; d.sites file2'
If a site lies in this open area, then the PNT_TO_AREA failure
should be expected.
Now, how should you fix this? You might try running v.support
with some snap. A run with v.spag might not hurt.
> Is there a fix for this or am I using the tools wrong ? My input data is
>GRASS vector format <header> A <n-points> <points> A<n-points> <points> etc..
>and an attribute file is created for each polygon (also a label file).
huh? you only need one attribute file and one cat file per binary
vector file. Do you only have one polygon per vector file?
>The import works fine, ie. i can display with d.vect but attaching attribute
>Any help is appreciated. Thanx
>duc at comsearch.com
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