Hi, I'm trying to use v.generalize method=douglas_reduction, but the output has the same number of vertices as the input map and I don't know why it is not being simplified.
In case it helps, the input map is: v.info JR_2001SubSetLines +----------------------------------------------------------------------------+ | Layer: JR_2001SubSetLines | | Mapset: generalize | | Location: 3DInterp | | Database: /home/eric | | Title: | | Map scale: 1:1 | | Map format: native | | Name of creator: eric | | Organization: | | Source date: Tue Jun 9 16:12:20 2009 | |----------------------------------------------------------------------------| | Type of Map: vector (level: 2) | | | | Number of points: 0 Number of areas: 0 | | Number of lines: 11758 Number of islands: 0 | | Number of boundaries: 0 Number of faces: 0 | | Number of centroids: 0 Number of kernels: 0 | | | | Map is 3D: Yes | | Number of dblinks: 0 | | | | Projection: Lambert Conformal Conic | | N: 251271.999 S: 250940.025 | | E: 913711.894 W: 913272.031 | | B: -1.288 T: 14.218 | | | | Digitization threshold: 0 | | Comments: | | | +----------------------------------------------------------------------------+ when I run v.generalize input=JR_2001SubSetLines output=JR_2001_SSL_reduc_50 method=douglas_reduction threshold=0 reduction=50 type=line --o I get Number of nodes: 11758 Number of primitives: 11758 Number of points: 0 Number of lines: 11758 Number of boundaries: 0 Number of centroids: 0 Number of areas: 0 Number of isles: 0 Number of vertices was reduced from 23516 to 23516 [100%] Adding the -r flag to remove small lines gives the same result. Using method=douglas without the -r flag gives the same result. Using method=douglas with the -r flag works, but I would like to know what I'm doing wrong and how to use the reduction feature. Thanks, Eric ----- Eric Hardin -- View this message in context: http://n2.nabble.com/Question-about-v.generalize%3A-nothing-is-removed-when-using--douglas_reduction--tp3068397p3068397.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
