Hello Louisa, THis is not a R solution but would it not be easier to use ImageMagick to do what you are wanting to do? Look up https://www.imagemagick.org/script/index.php
HTH, Ranjan On Wed, 5 Apr 2017 08:23:51 +0100 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. > -- Important Notice: This mailbox is ignored: e-mails are set to be deleted on receipt. Please respond to the mailing list if appropriate. For those needing to send personal or professional e-mail, please use appropriate addresses. ______________________________________________ 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.
