[postgis-tickets] [PostGIS] #3438: Unable to add NetCDF support to PostGIS 2.2

PostGIS trac at osgeo.org
Thu Jan 28 02:47:28 PST 2016 

#3438: Unable to add NetCDF support to PostGIS 2.2
------------------------+---------------------------------
  Reporter:  N3tMaster  |      Owner:  pramsey
      Type:  defect     |     Status:  new
  Priority:  blocker    |  Milestone:  PostGIS GDAL
 Component:  postgis    |    Version:  2.2.x
Resolution:             |   Keywords:  postgis gdal netcdf
------------------------+---------------------------------

Comment (by rouault):

 netCDF files are sometimes reported as datasets with zero reaster band,
 but with subdatasets listed. This is the subdatasets you must open. Use
 gdalinfo on the main netCDF file to see the name of the subdataset to use.

 Example :

 {{{
 $ gdalinfo NL.2001.nsidc0321v01.nc
 Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
 Driver: netCDF/Network Common Data Format
 Files: NL.2001.nsidc0321v01.nc
 Size is 512, 512
 Coordinate System is `'
 Metadata:
   NC_GLOBAL#comment=Not set at this time
   NC_GLOBAL#creation_date=Wed Feb 20 13:14:48 MST 2008
   NC_GLOBAL#grid_id=Nl
   NC_GLOBAL#history=Wed Feb 20 13:15:33 2008: ncrcat -O
 NL.2001001.nsidc0321v01.nc NL.2001009.nsidc0321v01.nc
 NL.2001017.nsidc0321v01.nc NL.2001025.nsidc0321v01.nc
 NL.2001033.nsidc0321v01.nc NL.2001041.nsidc0321v01.nc
 NL.2001049.nsidc0321v01.nc NL.2001057.nsidc0321v01.nc
 NL.2001065.nsidc0321v01.nc NL.2001073.nsidc0321v01.nc
 NL.2001081.nsidc0321v01.nc NL.2001089.nsidc0321v01.nc
 NL.2001097.nsidc0321v01.nc NL.2001105.nsidc0321v01.nc
 NL.2001113.nsidc0321v01.nc NL.2001121.nsidc0321v01.nc
 NL.2001129.nsidc0321v01.nc NL.2001137.nsidc0321v01.nc
 NL.2001145.nsidc0321v01.nc NL.2001153.nsidc0321v01.nc
 NL.2001161.nsidc0321v01.nc NL.2001185.nsidc0321v01.nc
 NL.2001193.nsidc0321v01.nc NL.2001201.nsidc0321v01.nc
 NL.2001217.nsidc0321v01.nc NL.2001225.nsidc0321v01.nc
 NL.2001233.nsidc0321v01.nc NL.2001241.nsidc0321v01.nc
 NL.2001249.nsidc0321v01.nc NL.2001257.nsidc0321v01.nc
 NL.2001265.nsidc0321v01.nc NL.2001273.nsidc0321v01.nc
 NL.2001281.nsidc0321v01.nc NL.2001289.nsidc0321v01.nc
 NL.2001297.nsidc0321v01.nc NL.2001305.nsidc0321v01.nc
 NL.2001313.nsidc0321v01.nc NL.2001321.nsidc0321v01.nc
 NL.2001329.nsidc0321v01.nc NL.2001337.nsidc0321v01.nc
 NL.2001345.nsidc0321v01.nc NL.2001353.nsidc0321v01.nc
 NL.2001361.nsidc0321v01.nc NL.2001.nsidc0321v01.nc
   NC_GLOBAL#institution=National Snow & Ice Data Center, Boulder, CO
   NC_GLOBAL#nco_openmp_thread_number=1
   NC_GLOBAL#references=Data set documentation:
 http://nsidc.org/data/nsidc-0321.html
   NC_GLOBAL#source=Satellite observations from DMSP SSM/I and Terra MODIS
   NC_GLOBAL#title=Global EASE-Grid 8-day Blended SSM/I and MODIS Snow
 Cover
 Subdatasets:
   SUBDATASET_1_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":bpInfo
   SUBDATASET_1_DESC=[43x81] bpInfo (8-bit character)
   SUBDATASET_2_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":scaInfo
   SUBDATASET_2_DESC=[43x81] scaInfo (8-bit character)
   SUBDATASET_3_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":latitude
   SUBDATASET_3_DESC=[721x721] latitude (64-bit floating-point)
   SUBDATASET_4_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":longitude
   SUBDATASET_4_DESC=[721x721] longitude (64-bit floating-point)
   SUBDATASET_5_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":SWE
   SUBDATASET_5_DESC=[43x721x721] lwe_thickness_of_surface_snow_amount
 (16-bit integer)
   SUBDATASET_6_NAME=NETCDF:"NL.2001.nsidc0321v01.nc":SCA
   SUBDATASET_6_DESC=[43x721x721] surface_snow_area_fraction (16-bit
 integer)
 Corner Coordinates:
 Upper Left  (    0.0,    0.0)
 Lower Left  (    0.0,  512.0)
 Upper Right (  512.0,    0.0)
 Lower Right (  512.0,  512.0)
 Center      (  256.0,  256.0)
 }}}

 {{{
 $ gdalinfo NETCDF:"NL.2001.nsidc0321v01.nc":bpInfo
 Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
 Driver: netCDF/Network Common Data Format
 Files: NL.2001.nsidc0321v01.nc
 Size is 81, 43
 Coordinate System is `'
 Metadata:
   bpInfo#long_name=SWE_file_used
   bpInfo#_FillValue=
   cols#long_name=x-coordinate in EASE-Grid
   cols#standard_name=projection_x_coordinate
   cols#units=count
   cols#valid_range={0,720}
   NC_GLOBAL#comment=Not set at this time
   NC_GLOBAL#creation_date=Wed Feb 20 13:14:48 MST 2008
   NC_GLOBAL#grid_id=Nl
   NC_GLOBAL#history=Wed Feb 20 13:15:33 2008: ncrcat -O
 NL.2001001.nsidc0321v01.nc NL.2001009.nsidc0321v01.nc
 NL.2001017.nsidc0321v01.nc NL.2001025.nsidc0321v01.nc
 NL.2001033.nsidc0321v01.nc NL.2001041.nsidc0321v01.nc
 NL.2001049.nsidc0321v01.nc NL.2001057.nsidc0321v01.nc
 NL.2001065.nsidc0321v01.nc NL.2001073.nsidc0321v01.nc
 NL.2001081.nsidc0321v01.nc NL.2001089.nsidc0321v01.nc
 NL.2001097.nsidc0321v01.nc NL.2001105.nsidc0321v01.nc
 NL.2001113.nsidc0321v01.nc NL.2001121.nsidc0321v01.nc
 NL.2001129.nsidc0321v01.nc NL.2001137.nsidc0321v01.nc
 NL.2001145.nsidc0321v01.nc NL.2001153.nsidc0321v01.nc
 NL.2001161.nsidc0321v01.nc NL.2001185.nsidc0321v01.nc
 NL.2001193.nsidc0321v01.nc NL.2001201.nsidc0321v01.nc
 NL.2001217.nsidc0321v01.nc NL.2001225.nsidc0321v01.nc
 NL.2001233.nsidc0321v01.nc NL.2001241.nsidc0321v01.nc
 NL.2001249.nsidc0321v01.nc NL.2001257.nsidc0321v01.nc
 NL.2001265.nsidc0321v01.nc NL.2001273.nsidc0321v01.nc
 NL.2001281.nsidc0321v01.nc NL.2001289.nsidc0321v01.nc
 NL.2001297.nsidc0321v01.nc NL.2001305.nsidc0321v01.nc
 NL.2001313.nsidc0321v01.nc NL.2001321.nsidc0321v01.nc
 NL.2001329.nsidc0321v01.nc NL.2001337.nsidc0321v01.nc
 NL.2001345.nsidc0321v01.nc NL.2001353.nsidc0321v01.nc
 NL.2001361.nsidc0321v01.nc NL.2001.nsidc0321v01.nc
   NC_GLOBAL#institution=National Snow & Ice Data Center, Boulder, CO
   NC_GLOBAL#nco_openmp_thread_number=1
   NC_GLOBAL#references=Data set documentation:
 http://nsidc.org/data/nsidc-0321.html
   NC_GLOBAL#source=Satellite observations from DMSP SSM/I and Terra MODIS
   NC_GLOBAL#title=Global EASE-Grid 8-day Blended SSM/I and MODIS Snow
 Cover
   rows#long_name=y-coordinate in EASE-Grid
   rows#standard_name=projection_y_coordinate
   rows#units=count
   rows#valid_range={0,720}
   time#long_name=julian day
   time#units=days since -4713-01-01 12:00:00
 Corner Coordinates:
 Upper Left  (    0.0,    0.0)
 Lower Left  (    0.0,   43.0)
 Upper Right (   81.0,    0.0)
 Lower Right (   81.0,   43.0)
 Center      (   40.5,   21.5)
 Band 1 Block=81x1 Type=Byte, ColorInterp=Undefined
   NoData Value=0
   Metadata:
     long_name=SWE_file_used
     NETCDF_VARNAME=bpInfo
     _FillValue=
 }}}

 So in that case the name for PostGIS out-db must be
 'NETCDF:"/path/to/NL.2001.nsidc0321v01.nc":variable_name'

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3438#comment:3>
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