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

[Pascal Oettli]

?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
>
>
>
> --
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>
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