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
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