The input map information suggests that you have linked more than one attribute table (i.e. a multi-layered input map). Make sure that when you run v.voronoi on the input map, you specify the correct layer, that actually contains all your input points.
Benjamin Sampson, David wrote: > Hey folks, > > Looking for a some ideas and help. > > I am ttrying to use the v.voronoi (in wingrass) tool and it is > perplexing me with the results I am getting. Here is the scenario. > > I am trying to anaylise the spatial distribution of road intersections. > I started with a road network file from Statistics Canada, and clipped > out the roads of the city of Ottawa for my subset. I created a new > vector containing only the nodes of the Ottawa network. The resulting > vector has the following basic stats > > ========= > Type of Map: vector (level: 2) | > | > | > | Number of points: 48156 Number of areas: > 0 | > | Number of lines: 0 Number of islands: > 0 | > | Number of boundaries: 0 Number of faces: > 0 | > | Number of centroids: 0 Number of kernels: > 0 | > | > | > | Map is 3D: > 0 | > | Number of dblinks: 2 > =========== > > The nodes represent both road terminations and intersections. > > I am new to using Voronoi charts but when I run the v.voronoi script I > expect it to create a polygon for each node. > > Instead when I run the basic stats on the new Veronoi vector I get: > > ============= > Type of Map: vector (level: 2) | > | > | > | Number of points: 0 Number of areas: > 1 | > | Number of lines: 0 Number of islands: > 1 | > | Number of boundaries: 4 Number of faces: > 0 | > | Number of centroids: 0 Number of kernels: > 0 | > | > | > | Map is 3D: > 0 | > | Number of dblinks: 1 > ============= > > I get a rectangular shape that is located just north of ONE of the nodes > in the coverage. As I zoom out some other nodes apear surounding > rectangualr shape… The manual doesn't shed light on my situation. > > Any help, experieince or knowledge would be great. > > Cheers > > > ------------------------------------------------------------------------ > > _______________________________________________ > grassuser mailing list > grassuser@grass.itc.it > http://grass.itc.it/mailman/listinfo/grassuser -- Benjamin Ducke, M.A. Archäoinformatik (Archaeoinformation Science) Institut für Ur- und Frühgeschichte (Inst. of Prehistoric and Historic Archaeology) Christian-Albrechts-Universität zu Kiel Johanna-Mestorf-Straße 2-6 D 24098 Kiel Germany Tel.: ++49 (0)431 880-3378 / -3379 Fax : ++49 (0)431 880-7300 www.uni-kiel.de/ufg _______________________________________________ grassuser mailing list grassuser@grass.itc.it http://grass.itc.it/mailman/listinfo/grassuser