Hi Ahmed, When reading from a ncdf file you can use the 'varname', 'lvar' and 'level' arguments - see the 'Details' section in the docs
https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster <https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster> We can't tell what is in the ncdf file from what you report other than it has 4 bands (layers) and that the first is called 'Volumetric.water.content.at..33.kPa' If you want to know more about the what is in the file, then I suggest you use the ncdf4 package to open the file and explore it's contents - you should get a clear picture of it's contents from that. Something like this (untested)... library(ncdf4) x <- nc_open(file.nc) x nc_close(x) While print lots of info about the file. Ben > On Mar 28, 2018, at 10:37 AM, Ahmed Attia <ahmedati...@gmail.com> wrote: > > Hi > > I have a netCDF file of volumetric soil water content at four > different soil layers and want to convert each soil layer in the > netCDF file to a GeoTIFF layer. This code converts the netCDF file to > one GeoTIFF layer, i.e. unclear which soil depth. > > file.nc <- "C:/Soil_Weather_data/Agro/VMC21/VMC21.nc" > > file.tiff <- "C:/Soil_Weather_data/Agro /VMC21/VMC21" > > importnetcdf <- raster(file.nc) > >> importnetcdf > class : RasterLayer > band : 1 (of 4 bands) > #the bands here are the four soil layers > dimensions : 16800, 43200, 725760000 (nrow, ncol, ncell) > resolution : 0.00833333, 0.00833333 (x, y) > extent : -180, 179.9998, -56, 83.99995 (xmin, xmax, ymin, ymax) > coord. ref. : +proj=longlat +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0 > data source : > C:\FAPSEP_Eucalyptus\FAPSEP\Soil_Weather_data\Agro_IBIS_Eucalipto\VMC21\VMC21.nc > names : Volumetric.water.content.at..33.kPa > z-value : 4.5 > zvar : VMC2 > > > > VMC1<-writeRaster(importnetcdf,filename="file.tiff",format="GTiff",overwrite=TRUE,bylayer=TRUE,suffix="1:4") > #bylayer=TRUE, did not work. > >> VMC1 > class : RasterLayer > dimensions : 16800, 43200, 725760000 (nrow, ncol, ncell) > resolution : 0.00833333, 0.00833333 (x, y) > extent : -180, 179.9998, -56, 83.99995 (xmin, xmax, ymin, ymax) > coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 > +towgs84=0,0,0 > data source : C:\Users\Ahmed\Documents\file.tif > names : file > values : 2, 80 (min, max) > > Any help! > > > Ahmed Attia, Ph.D. > Agronomist & Soil Scientist > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org Tick Forecasting: https://eco.bigelow.org/ [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
