[R-sig-Geo] reading into R IPCC data files

[Thomas Adams]

  Barry,

WRT your last line — I could not agree more; the same thought came to me 
as well!

Tom

On 1/16/11 11:04 AM, Barry Rowlingson wrote:
> On Sun, Jan 16, 2011 at 3:28 PM, Thomas Adams<Thomas.Adams at noaa.gov>  wrote:
>>
>> Marco,
>>
>> I just took a look at the data; unfortunately, it's not in a very usable
>> format without reformatting it for
>> importing the data into either R or a GIS, such as GRASS GIS. I'm sure an
>> experienced R programmer could
>> write a clever R script to do what you want. Personally, I would write a
>> Perl script to reformat the data to
>> import directly into GRASS GIS. I looked at the HADCM3_A2a_PREC_1980.tar.gz
>> data and it is cell-centered.
>> GRASS grids are referenced by the lower-left grid corner. I noticed that
>> there are many different grid spacings
>> and not all the grids are square, they are rectangular. Bottom line is that
>> a lot of care is going to be needed
>> to manipulate these data sources. I have to think that somewhere there must
>> be this same data available in grib
>> format, which imports into GRASS very easily.
>>
>> Regards,
>> Tom
>>
>>
>> On 1/15/11 6:54 PM, Mario Bellinato wrote:
>>> Dear R-sig-geo users,
>>>
>>> I was wondering whether there is a way of reading into R the IPCC
>>> climate scenario data (see
>>> <http://www.ipcc-data.org/sres/hadcm3_download.html>) and export them
>>> into a format that can be read by a GIS programme?
>>>
> That's a horrendous data file format, typical of the sort of thing you
> get from Fortran programmers :)
>
> There's a very complex-looking "web 0.1" style data browser thing here
> which lets you eventually download .csv files which might be easier to
> read into R. I think you can only get a month at a time though, and it
> might not be the same data as in your original link (but the Hadley
> centre stuff seems to be there...):
>
> http://www.ipcc-data.org/cgi-bin/ddc_nav/dataset=ar4_gcm
>
>   You'd almost think they don't want us to know about climate change....
>
> Barry


-- 
Thomas E Adams
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