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Results tagged with grass-gis
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user 84287
GRASS GIS (Geographic Resources Analysis Support System) is a free, open source geographical information system (GIS) specialized in handling raster, topological vector, image processing, and graphic data. GRASS GIS is a high performance analytical GIS and remote sensing with focus on modularity. Users can process both day-to-day data as well as massive time series.
5
votes
1
answer
181
views
Getting WHERE statement to work in v.generalize?
I have a shape (its topology is terrible but I don't think it's the problem). I'm trying to simplify it to reduced it's size using v.generalise. I succeeded at reducing the whole shape but I actuall …
- 649
2
votes
Accepted
Getting WHERE statement to work in v.generalize?
The problem here is that the use of the cat and WHERE options from v.generalize requires the layer=1 option set as well. As of right now (nov 2018), QGIS default value for layer is set to -1 and doe …
- 649
2
votes
1
answer
2k
views
Clustering spatially connected polygons so all clusters have approximately the same size
I want to group together polygons from a shapefile a way that all the clusters formed contained approximately the same number of polygons. The problem is that the source polygons have vastly differen …
- 649
2
votes
Clustering spatially connected polygons so all clusters have approximately the same size
I finally found a way, I scripted my own clustering function in R which works relatively great. The idea is to start from the neighbor list and iteratively make groups. The algorithm looks a little …
- 649
1
vote
i.maxlik cannot read i.class output signature file
I've had this error from i.cluster, so not exactly the same as you, but I've fixed it by changing the options of my clusterring. In my case, I've set the minimum number of pixels per class (min_size) …
- 649