Hi Kirk,
in your r.in.gdal syntax the time_bnds is the variable you want to
read. My guess would be the variable you want to read is pet.
I would suggestion executing the following commands to read your file
metadata before running the r.in.gdal.
/gdalinfo D:\data\projects\courses2012\IAI\data\B1_tas.nc
/
This will give you the variable names in your dataset. In your case I
see PET
Then to find the dimensions on the variable of interest execute The
syntax is your netCDF name : variable name
/gdalinfo NETCDF:D:\data\projects\courses2012\IAI\data\A2_tas.nc:tasC /
In my example the netCDF name is A2_tas.nc an the variable I want is
tasC (temperature in degrees celsius). My data has 10 temporal dimensions.
You should put <netCDF Name>:PET
Now that I know this I run the r.in.gdal
/r.in.gdal -o -e input=NETCDF:
D:\data\projects\courses2012\IAI\data\A2_tas.nc:tasC output=SRESA2_tas/
In this example I am bringing in all times if you want specify just 1
time you can do so by using the BAND number.
Jennifer
On 10/1/2012 12:02 PM, Kirk Wythers wrote:
I am trying to read some netCDF data (from the CRU climate database)
into grass. I am looking at the netcdf wiki page and having a little
trouble translating the instructions there to the output I am getting
from "gdalinfo". Here is the
If I am trying to use syntax that looks something like:
r.in.gdal input=NETCDF:"sst.nc":time_bnds output=sst
I am getting the following error:
ERROR 4:
`NETCDF:~/Downloads/cru_ts_3_10.1901.2009.pet.dat.nc:time_bnds' does
not exist in the file system,
and is not recognised as a supported dataset name.
In my case, the PATH_TO_FILE is
"~/Downloads/cru_ts_3_10.1901.2009.pet.dat.nc"
However, I can't tell what to use in the place of ":time_bnds". Any
ideas from the pasted text below of what my input argument should look
like?
Thanks in advance,
Kirk
Here is output I am looking at from gdalinfo:
GRASS 6.4.1 (globe_30min):~ > gdalinfo
~/Downloads/cru_ts_3_10.1901.2009.pet.dat.nc
ERROR 1: GDAL/GRASS57 driver was compiled against GDAL 1.8 but current
library version is 1.9
ERROR 1: GDAL/GRASS57 driver was compiled against GDAL 1.8 but current
library version is 1.9
Driver: netCDF/Network Common Data Format
Files:
/Network/Servers/truffula.fr.umn.edu/Volumes/disk1/home1/kirkw/Downloads/cru_ts_3_10.1901.2009.pet.dat.nc
<http://truffula.fr.umn.edu/Volumes/disk1/home1/kirkw/Downloads/cru_ts_3_10.1901.2009.pet.dat.nc>
Size is 720, 360
Coordinate System is `'
Origin = (-180.000000000000000,90.000000000000000)
Pixel Size = (0.500000000000000,-0.500000000000000)
Metadata:
lat#long_name=latitude
lat#units=degrees_north
lon#long_name=longitude
lon#units=degrees_east
NC_GLOBAL#comment=Data restrictions: for academic research use
only.Contact BADC for details
NC_GLOBAL#contact=BADC <[email protected] <mailto:[email protected]>>
NC_GLOBAL#Conventions=CF-1.4
NC_GLOBAL#history=Wed Feb 2 03:32:36 GMT 2011 : User badc : Program
makegridsauto.for called by update.for
NC_GLOBAL#institution=Data held at British Atmospheric Data Centre,
RAL, UK.
NC_GLOBAL#references=Information on the data is available at
http://badc.nerc.ac.uk/data/cru/
NC_GLOBAL#source=Run ID = 1102011219
Data generated by BADC from:
tmp.1009221824.dtb
dtr.1009221824.dtb
vap.1009221824.dtb
cld.1009221824.dtb
NC_GLOBAL#title=CRU TS 3.10 Potential Evapotranspiration
pet#_FillValue=9.969209968386869e+36
pet#correlation_decay_distance=-999
pet#long_name=potential evapotranspiration
pet#missing_value=9.969209968386869e+36
pet#units=mm
time#calendar=gregorian
time#long_name=time
time#units=days since 1900-1-1
Corner Coordinates:
Upper Left (-180.0000000, 90.0000000)
Lower Left (-180.0000000, -90.0000000)
Upper Right ( 180.0000000, 90.0000000)
Lower Right ( 180.0000000, -90.0000000)
Center ( 0.0000000, 0.0000000)
Band 1 Block=720x1 Type=Float64, ColorInterp=Undefined
NoData Value=9.96920996838686905e+36
Metadata:
_FillValue=9.969209968386869e+36
correlation_decay_distance=-999
long_name=potential evapotranspiration
missing_value=9.969209968386869e+36
NETCDF_DIMENSION_time=380
NETCDF_time_units=days since 1900-1-1
NETCDF_VARNAME=pet
units=mm
Band 2 Block=720x1 Type=Float64, ColorInterp=Undefined
NoData Value=9.96920996838686905e+36
Metadata:
_FillValue=9.969209968386869e+36
correlation_decay_distance=-999
long_name=potential evapotranspiration
missing_value=9.969209968386869e+36
NETCDF_DIMENSION_time=410
NETCDF_time_units=days since 1900-1-1
NETCDF_VARNAME=pet
units=mm
.
.
.
.
Band 1308 Block=720x1 Type=Float64, ColorInterp=Undefined
NoData Value=9.96920996838686905e+36
Metadata:
_FillValue=9.969209968386869e+36
correlation_decay_distance=-999
long_name=potential evapotranspiration
missing_value=9.969209968386869e+36
NETCDF_DIMENSION_time=40161
NETCDF_time_units=days since 1900-1-1
NETCDF_VARNAME=pet
units=mm
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
