[GRASSLIST:4990] Re: US Census boundary file problem
mash at econs.umass.edu
Mon Nov 18 16:44:48 EST 2002
> Try to click on that areas with d.what.vect, you can get:
> 1) no area -> unclosed areas
> 2) area not labeled -> missing category
> 3) labeled area -> strange
Using d.what.vect and moving due east from northern New
Mexico, U.S.A., I find New Mexico, Nothing where Texas
Should Be, and Oklahoma:
st99_d00.name in mash Area - Category 192 New Mexico
Size - Sq Meters: 1000865258519.582 Hectares: 100086525.852
Acres: 247313185.009 Sq Miles: 386426.8516
st99_d00.name in mash Nothing Found.
st99_d00.name in mash Area - Category 191 Oklahoma
Size - Sq Meters: 2210586840632.636 Hectares: 221058684.063
Acres: 546234638.122 Sq Miles: 853491.6221
I think that the problem is an unclosed area.
> Are you sure that attributes imported from e00 were integers > 0?
> As cats < 1 are not valid, such records are deleted from dig_att
> by v.support.
The dig_att/ file looks perefectly fine and includes lines
with attributes that correspond to Texas in the dig_cats/
Michael Ash, Assistant Professor
of Economics and Public Policy
Department of Economics and CPPA
University of Massachusetts
Amherst, MA 01003
Tel 413-545-6329 Fax 413-545-2921
Email mash at econs.umass.edu
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