Hello Everybody
I have an shp file with 1398 polygons. I can't import it into a proper
vector file using v.in.shape because many unclosed ares and some double
lines occure after v. support. However it imports perfect into a raster
consisted of 1398 polygons using r.in.shape. What may it be?
Maciek
On Thu, 26 Aug 2004, Maciek Sieczka wrote:
Hello Everybody
I have an shp file with 1398 polygons. I can't import it into a proper
vector file using v.in.shape because many unclosed ares and some double
lines occure after v. support. However it imports perfect into a raster
consisted of 1398 polygons using r.in.shape. What may it be?
Topological errors like unclosed area boundaries do not matter for raster data or for the Simple Features vector model used in Shapefiles, but GRASS uses a topologically correct vector model and the data are considered as errors.
GRASS 5.7 (v.in.ogr especially) has many convenient facilities for fixing these errors (which are caused by bad quality data).
Paul