On 5/29/07, Leonardo Lami <[EMAIL PROTECTED]> wrote:
> - run v.clean as per CORINE example (v.clean input=wateroriginal > output=waterclean tool=rmdupl) in GRASS shell > - at this point I noticed that the attribute values are not carried > through and I'm left with only "id" and "cat" - why is this, and will > it cause problems later on? See the output message of v.in.ogr, maybe there is some problems in the structure of the input table
Hi Leonardo: Thanks for the idea. I had originally thought that the v.in.ogr was fine, and that the attributes were lost in the v.clean step. However, I looked again, and it does appear that only a portion of the attributes (e.g. the first 137 features) came through during the v.in.ogr step. That may potentially be the cause of the problems with v.clean? I've attached the output of v.in.ogr, although I don't see anything that indicated a problem? ---start output of v.in.ogr: --- v.in.ogr 'dsn=C:/documents and settings/dcope/desktop/shp/obm_OBMUSER_waterseg_polyne_poly.shp' output=test -o A datum name nad83 (North_American_Datum_1983) was specified without transformation parameters. Non-interactive mode: the GRASS default for nad83 is towgs84=0.000,0.000,0.000. Over-riding projection check. Proceeding with import... Layer: obm_OBMUSER_waterseg_polyne_poly Importing map 1277 features... ----------------------------------------------------- Building topology ... Registering lines: 1000 1837 primitives registered Building areas: 1530 areas built 1496 isles built Attaching islands: Attaching centroids: Topology was built. Number of nodes : 1663 Number of primitives: 1837 Number of points : 0 Number of lines : 0 Number of boundaries: 1837 Number of centroids : 0 Number of areas : 1530 Number of isles : 1496 Number of incorrect boundaries : 341 Number of areas without centroid : 1530 ----------------------------------------------------- Cleaning polygons, result is not guaranteed! Building topology ... Topology was built. Number of nodes : 1663 Number of primitives: 1837 Number of points : 0 Number of lines : 0 Number of boundaries: 1837 Number of centroids : 0 Number of areas : - Number of isles : - ----------------------------------------------------- Break polygons: Registering points ... 128830 All points (vertices): 144066 Registered points (unique coordinates): 128830 Points marked for break: 1947 Breaks: 0 Breaks: 13 Breaks: 22 Breaks: 38 Breaks: 41 Breaks: 68 <snip> Breaks: 1279 ----------------------------------------------------- Remove duplicates: Duplicates: 0 <snip> Duplicates: 459 ----------------------------------------------------- Break boundaries: Intersections: 0 Intersections: 0 (line 637) Intersections: 0 (line 1243) Intersections: 0 (line 1875) Intersections: 0 (line 2119) Intersections: 0 (line 2398) Intersections: 0 (line 2623) Intersections: 0 (line 2859) Intersections: 0 ----------------------------------------------------- Remove duplicates: Duplicates: 0 ----------------------------------------------------- Clean boundaries at nodes: Modifications: 0 <snip> Modifications: 0 ----------------------------------------------------- Change dangles to lines: Removed dangles: 0 removed lines: 0 Removed dangles: 0 removed lines: 0 ----------------------------------------------------- Remove bridges: Removed bridges: 0 removed lines: 0 <snip> Removed bridges: 0 removed lines: 0 ----------------------------------------------------- Building topology ... Building areas: 1712 areas built 1421 isles built Attaching islands: Topology was built. Number of nodes : 1947 Number of primitives: 3116 Number of points : 0 Number of lines : 0 Number of boundaries: 3116 Number of centroids : 0 Number of areas : 1712 Number of isles : 1421 Number of areas without centroid : 1712 Layer: obm_OBMUSER_waterseg_polyne_poly ----------------------------------------------------- ----------------------------------------------------- Building topology ... Registering lines: 1000 2000 3000 3524 primitives registered Building areas: 1712 areas built 1421 isles built Attaching islands: Attaching centroids: Topology was built. Number of nodes : 3233 Number of primitives: 3524 Number of points : 0 Number of lines : 0 Number of boundaries: 2238 Number of centroids : 1286 Number of areas : 1712 Number of isles : 1421 Number of areas without centroid : 426 ----------------------------------------------------- 4 areas represent more (overlapping) features, because polygons overlap in input layer(s). Such areas are linked to more than 1 row in attribute table. The number of features for those areas is stored as category in layer 2 1286 input polygons total area: 1.945637e+008 (1712 areas) overlapping area: 1.987796e+006 (4 areas) area without category: 4.105847e+006 (426 areas) Successfully finished ---end output of v.in.ogr: --- _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
