Re: [R-sig-Geo] Optimizing spatial query in R

I generally use postgis for this sort of thing. THK http://www.keittlab.org/ On Mon, Feb 20, 2017 at 2:45 AM, Ervan Rutishauser wrote: > Dear All, > > I am desperately trying to fasten my algorithm to estimate the fraction of > tree crown that overlap a given 10x10

Re: [R-sig-Geo] Optimizing spatial query in R

Dear Chris, Thanks for your prompt reply and pointing out the "sf" package . I wasn't aware of it, but I am glad to see it has been released only 2 weeks ago ;) I'll have a look right now. Tschüss Ervan On 20 February 2017 at 10:56, Chris Reudenbach wrote: > Ervan,

Re: [R-sig-Geo] Optimizing spatial query in R

Ervan, Just on the run, especially if you deal with real data and some 100K -1000K of vectors I think the fastest way to do so is to engage GDAL GRASS7/SAGA and their ability to deal highly efficient with this kind of topological and geometrical queries. A very good pure R alternative is to

[R-sig-Geo] Optimizing spatial query in R

Dear All, I am desperately trying to fasten my algorithm to estimate the fraction of tree crown that overlap a given 10x10 subplot in a forest plot. I have combined a set of spatial functions (gDistance, extract) & objects (SpatialGrid, SpatialPolygons) in a way that is probably not the most