?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. ______________________________________________ R-help@r-project.org mailing list 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 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.
