Hi Roy, thanks for the fast response. I attached the two versions of the netCDF file (before and after running the R script). I haven't tried to use ncdump yet, but I will. Annelie -----Ursprüngliche Nachricht----- Von: Roy Mendelssohn [mailto:Roy.Mendelssohn@xxxxxxxx] Gesendet: Wednesday, July 28, 2010 5:58 PM An: Holzkaemper Annelie ART Cc: netcdfgroup@xxxxxxxxxxxxxxxx Betreff: Re: [netcdfgroup] transfering netCDF-file from R to ArcGIS Hi Annelie: Since this involves a lot more than netcdf (R, ArcGIS), a little more info would help. Do you access to the ncdump utility? Can you do an "ncdump -h" on the files with and without precipitation? otherwise, if the files aren't toobig, can you send them somehow. Also, the ArcGIS netcdf import is (unfortunately) known to be buggy. -Roy On Jul 28, 2010, at 8:27 AM, annelie.holzkaemper@xxxxxxxxxxxx wrote: > Hi, > I am trying to generate a NetCDF file in R that can be imported in ArcGIS > using the "Make NetCDF Feature Layer" tool (it is supposed to store time > series data for each climate station). I have used an ArcGIS point-shapefile > and converted it into a NetCDF file that I can use as a template. This file > has 1 dimension (the point ID) and 3 variables (x coordinate, y coordinate, > elevation). It can easily be imported to ArcGIS using "Make NetCDF Feature > Layer". > But now I want to add a new variable ("precipitation") to the netcdf-file in > R: > > >>library(ncdf) > >>my.nc = open.ncdf("C:/temp/pointtest8.nc", write=TRUE) > > >>dim_id <- my.nc$dim[[1]] > > >>varz = var.def.ncdf("Precipitation","km", list(dim_id), -9999, > longname="Daily precipitation", prec="double") > > >>my.nc <- var.add.ncdf(my.nc, varz) > > >>close.ncdf(my.nc) > > > If I try to import the file modified with R into ArcGIS ("Make NetCDF Feature > Layer") and choose "precipitation" instead of "elevation" as a variable, I > can not choose the x and y variables (there are no options in the drop down > list). However, it is still possible to choose the x and y variables for > "elevation". So, there seems to be some sort of link between the original > variable "elevation" and the x- and y-variables that I have not defined for > my new variable "precipitation" in R. What could be wrong with my definition > of the new variable? > > I would be very grateful for any suggestions! > > Cheers, > Annelie > > > > > > > _______________________________________________ > netcdfgroup mailing list > netcdfgroup@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ ********************** "The contents of this message do not reflect any position of the U.S. Government or NOAA." ********************** Roy Mendelssohn Supervisory Operations Research Analyst NOAA/NMFS Environmental Research Division Southwest Fisheries Science Center 1352 Lighthouse Avenue Pacific Grove, CA 93950-2097 e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address) voice: (831)-648-9029 fax: (831)-648-8440 www: http://www.pfeg.noaa.gov/ "Old age and treachery will overcome youth and skill." "From those who have been given much, much will be expected"
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before_pointtest8.nc
Description: before_pointtest8.nc
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after_pointtest8.nc
Description: after_pointtest8.nc
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