Re: [R-sig-Geo] Union/Overlay single spatialPolygonsDataFrame containing overlapping polygonsto create polygons with all unique combinations of attributes

2015-08-11 Thread Bernd Vogelgesang
Hi, I don't know if that is of any help, but right at the moment I am building a model in QGIS which should achieve sth similar: I have overlapping polygons with minute values per square meter, which I self-intersect, calculate the new area and then dissolve the intersecting parts while

[R-sig-Geo] Spatial stationarity

2015-08-11 Thread adeela uaf
Hi, I asked a question here about how we can check spatial stationarity in R for a data having latitude and longitude of the meausred reponse. Suggestions given were based on graphical outputs. These are based on subjective approaches. My question is still how we can check about stong

Re: [R-sig-Geo] Union/Overlay single spatialPolygonsDataFrame containing overlapping polygonsto create polygons with all unique combinations of attributes

2015-08-11 Thread Michael Sumner
On Mon, 10 Aug 2015 at 17:52 nevil amos nevil.a...@gmail.com wrote: I am attempting to combine overlapping polygons in a single spatialPolygonsDataFrame so that the output is a set of polygons such that where there is no overlap one polygon, of the non-intersecting area will be formed, and

Re: [R-sig-Geo] Spatial stationarity

2015-08-11 Thread Tim Meehan
Hi Adeela, The GWmodel package has geographically weighted regression (GWR) routines that return statistical tests for stationarity. Best, Tim On Tue, Aug 11, 2015 at 1:10 AM, adeela uaf adeela@gmail.com wrote: Hi, I asked a question here about how we can check spatial stationarity in R

Re: [R-sig-Geo] densify geometries

2015-08-11 Thread Robert J. Hijmans
geosphere functions makeLine and makePoly do this, but only for lon/lat, not for planar coordinates. Robert On Fri, Aug 7, 2015 at 6:30 AM, Michael Sumner mdsum...@gmail.com wrote: This is a nice idea with gBuffer, but testing on a simple case shows you need explicit curvature to get any extra

Re: [R-sig-Geo] Union/Overlay single spatialPolygonsDataFrame containing overlapping polygonsto create polygons with all unique combinations of attributes

2015-08-11 Thread Robert J. Hijmans
I would think raster::union(polygons) should get you there. Robert On Tue, Aug 11, 2015 at 7:58 AM, Michael Sumner mdsum...@gmail.com wrote: On Mon, 10 Aug 2015 at 17:52 nevil amos nevil.a...@gmail.com wrote: I am attempting to combine overlapping polygons in a single spatialPolygonsDataFrame