Hi, You'll get a lot of help if you take this question to the R-sig-geo list
https://stat.ethz.ch/mailman/listinfo/r-sig-geo In the meantime, you might want to try reading this using raster::raster() and then cropping to your desired region. Here's a discussion that may help you... https://stat.ethz.ch/pipermail/r-sig-geo/2010-July/008838.html You will find many other useful bits using Rseek.org - try http://rseek.org/?q=subset+large+geotif Cheers, Ben > On Apr 5, 2017, at 3:23 AM, Louisa Reynolds via R-help <r-help@r-project.org> > wrote: > > Ok. I have a tiff of size over 2GB. It covers a sixth of the Earth's surface > and I'm trying to cut a UK piece out of it. The tiff I start with seems to be > too large for R to handle. > > > Sent from my iPhone > >> On 4 Apr 2017, at 18:37, jim holtman <jholt...@gmail.com> wrote: >> >> How big is 'large'? >> >> Jim Holtman >> Data Munger Guru >> >> What is the problem that you are trying to solve? >> Tell me what you want to do, not how you want to do it. >> >> >> On Tue, Apr 4, 2017 at 7:47 AM, Louisa Reynolds via R-help >> <r-help@r-project.org> wrote: >>> Dear Forum >>> I am trying to cut out a small section of a very large 2-dimensional >>> grayscale image as a tiff in R, but it is having difficulty handling such >>> large files. I have looked at bigmemory and ff packages but it is unclear >>> how I can use these packages with tiffs. Can anyone please suggest >>> something? I have tried tiff and rtiff libraries. >>> Thanks in advance. >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> 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 -- To UNSUBSCRIBE and more, see > 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. Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
