[R] taking a small piece of large tiff

[jim holtman]

if you have 8GB of memory it should be easy to handle.


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 Wed, Apr 5, 2017 at 3:23 AM, Louisa Reynolds
<louisa_reynolds at yahoo.co.uk> 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 <jholtman at 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 at 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]]
>>>
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>