[R] data from SpatialGridDataFrame
Dear All, I have a raster map of the class 'SpatialPointsDataFrame' and coordinates of the class 'SpatialPoints'. I would like to retrieve the values that are contained in the raster map at the specific locations given by the coordinates. Can anyone help me out? Kind regards, Katrin Fleischer __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] data from SpatialGridDataFrame
I'm not that familiar with this type of data. I just had a similar issue, but had a GIS person do it in Arc view. But maybe try some of the following functions? Match %in% Plus I'll forward U the replies I got to my post Good luck :-) -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of kfl...@falw.vu.nl Sent: Tuesday, 20 July 2010 9:42 PM To: r-help@r-project.org Subject: [R] data from SpatialGridDataFrame Dear All, I have a raster map of the class 'SpatialPointsDataFrame' and coordinates of the class 'SpatialPoints'. I would like to retrieve the values that are contained in the raster map at the specific locations given by the coordinates. Can anyone help me out? Kind regards, Katrin Fleischer __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] data from SpatialGridDataFrame
see ?sp::overlay and section 5.2 of Applied Spatial Data Analysis with R I see there is now also raster::overlay, but I can't claim experience with that funciton (however my impression is that the raster package is a powerful tool for working with potentially very large rasters in R). hth, Kingsford On Tue, Jul 20, 2010 at 6:12 AM, kfl...@falw.vu.nl wrote: Dear All, I have a raster map of the class 'SpatialPointsDataFrame' and coordinates of the class 'SpatialPoints'. I would like to retrieve the values that are contained in the raster map at the specific locations given by the coordinates. Can anyone help me out? Kind regards, Katrin Fleischer __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
