[R-sig-Geo] Speeding up focal

I am trying to use raster::focal to fill some holes in many RasterLayers. I call: focal(raster_layer, fun = mean, w = matrix(1, nrow = 3, ncol = 3), NAonly = TRUE, na.rm = TRUE) I am only interested in filling in holes in a small subset of each RasterLayer (i.e. a country when the raster is

Re: [R-sig-Geo] Fill NoData cells in a raster

A bunch of options is given here too: http://rstudio-pubs-static.s3.amazonaws.com/1057_1f7e9ac569644689b7e4de78c1fece90.html 2016-03-18 10:45 GMT-04:00 Zack Holden : > Marine, > The focal() function in the raster library should work. You should be able > to apply a custom

Re: [R-sig-Geo] Find a circle center with spatial points

On Fri, Mar 18, 2016 at 2:43 PM, Alex Mandel wrote: > library(rgeos) > gCentroid > > http://www.rdocumentation.org/packages/rgeos/functions/topo-unary-gCentroid > > Assuming its a circle that would be the center. Only if you have points uniformly (or uniform-randomly)

Re: [R-sig-Geo] Find a circle center with spatial points

Oops :-[ , Barry thanks for clarification , I got it now. I don't understand the math either but as a kind of "reparation" for not reading well enough I found the authors java code. https://www.spaceroots.org/documents/circle/CircleFitter.java After download you should for standalone compilation