[GRASS-user] Encountering an error importing shapefiles with v.in.ogr

[Thomas Adams]

Raffaele,

After further testing, I do see the same problem you have had, 
namely,"(some) areas which are not available after using v.in.ogr." This 
is very apparent if I randomly color the polygons — some do not get 
filled. Also, if I do a v.to.rast conversion, I get holes in the newly 
created raster.

Does anyone have thoughts on this?

Regards,
Tom


Raffaele Morelli wrote:
>
>     Cannot display areas, topology not available.
>
>     I am virtually certain that I was able to successfully import this
>     and
>     other shapefiles in previous versions of GRASS (GRASS 4.x & GRASS
>     5.x).
>     The shapefiles files include the *.dbf, *.shp, and *.shx files,
>     which I
>     think, should be enough. If I import shapefiles from the US National
>     Atlas (created by the USGS), I have no problems. It seems that
>     with all
>     shapefiles generated by my office using ArcGIS 9.0, I have this
>     problem.
>
>
> Similar problem with shapefiles generated using ArcGIS, I recently 
> posted a topic about (some) areas which are not available after v.in.ogr.
>
>     Does anyone have suggestions as to what could be going on? 
>
>
> Hamish suggested using 'v.in.ogr -c ' (does not clean polygons) which 
> didn't worked for me.
> I partially solved using v.in.ogr without min_area and snap parameters 
> but when patching adjacent shapes I do not some polygons lost area.
> Are you experiencing something similar with ArcGIS shapes?
>
> regards
> raffaele
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-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

EMAIL:	thomas.adams at noaa.gov

VOICE:	937-383-0528
FAX:	937-383-0033