[R] how to extract values from a raster according to Lat and long of the values?

[jim holtman]

How do you get those values from the example header file that you included?

On Sun, Jan 27, 2013 at 9:15 PM, Pascal Oettli <kridox at ymail.com> wrote:
> ?extract
>
> HTH
> Pascal
>
>
> Le 27/01/2013 22:53, Jonsson a écrit :
>>
>> having 12 files with 12 hdrs for one year:    these files are raster
>> (projected  WGS84,lat
>> long):https://echange-fichiers.inra.fr/get?k=rLSyoavrnifGyH5XrlO
>>
>>                samples = 1440
>>                 lines   = 720
>>                 bands   = 1
>>                 header offset = 0
>>                 file type = ENVI Standard
>>                 data type = 4
>>                 interleave = bsq
>>                  byte order = 0
>>            map info = {  Geographic Lat/Lon, 1, 1, -180, 90, 0.25,
>> 0.25,WGS-84}
>>              coordinate system string =
>> GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",
>>                       SPHEROID["WGS_1984",6378137,298.257223563]]
>>             ,PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]
>>                       }
>> These lines will open the files as a list:
>>
>>            a<-list.files("D:\\ECV\\2010", "*.envi", full.names = TRUE)
>>                 for(i in 1:length(a)){
>>                  d <- raster(a[i]}
>>
>> I would like to extract the values correspond to  44.8386° N, 0.5783° W
>> from
>> all files as txt file
>>
>>
>>
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/how-to-extract-values-from-a-raster-according-to-Lat-and-long-of-the-values-tp4656767.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.



-- 
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.