I am downloading a netcdf file from a thredds data server. It contains 4 grib datasets of weather data. When I run gdalinfo on one of these subdatasets, the standard parallels in the netCDF metadata (marked by astrisks) differs from the standard parallels in the reported Coordinate system:<br>
<br>kyle@kyle-fs-laptop:~/Desktop$ gdalinfo NETCDF:"<a href="http://NDFD_TEMP.NC">NDFD_TEMP.NC</a>":Maximum_temperature <br>Driver: netCDF/Network Common Data Format<br>Files: <a href="http://NDFD_TEMP.NC">NDFD_TEMP.NC</a><br>
Size is 6, 7<br>Coordinate System is:<br>PROJCS["unnamed",<br> GEOGCS["WGS 84",<br> DATUM["WGS_1984",<br> SPHEROID["WGS 84",6378137,298.257223563,<br> AUTHORITY["EPSG","7030"]],<br>
TOWGS84[0,0,0,0,0,0,0],<br> AUTHORITY["EPSG","6326"]],<br> PRIMEM["Greenwich",0,<br> AUTHORITY["EPSG","8901"]],<br> UNIT["degree",0.0174532925199433,<br>
AUTHORITY["EPSG","9108"]],<br> AUTHORITY["EPSG","4326"]],<br> PROJECTION["Lambert_Conformal_Conic_2SP"],<br> PARAMETER["standard_parallel_1",0],<br>
PARAMETER["standard_parallel_2",0],<br> PARAMETER["latitude_of_origin",25],<br> PARAMETER["central_meridian",0],<br> PARAMETER["false_easting",0],<br> PARAMETER["false_northing",0]]<br>
Origin = (-1592.424266064417225,2268.326251018509083)<br>Pixel Size = (5.079361328124969,-5.079472167968713)<br>Metadata:<br> NC_GLOBAL#Conventions=CF-1.0<br> NC_GLOBAL#Originating_center=US National Weather Service (NCEP) subcenter = 5<br>
NC_GLOBAL#Generating_Process_or_Model=Forecast<br> NC_GLOBAL#Product_Status=Operational products<br> NC_GLOBAL#Product_Type=Forecast products<br> NC_GLOBAL#cdm_data_type=GRID<br> NC_GLOBAL#creator_name=US National Weather Service (NCEP) subcenter = 5<br>
NC_GLOBAL#file_format=GRIB-2<br> NC_GLOBAL#History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (NetcdfCFWriter)<br>Original Dataset = NDFD-CONUS_5km_best.ncd; Translation Date = Tue Jan 05 10:22:42 MST 2010<br>
NC_GLOBAL#_CoordinateModelBaseDate=2009-11-21T12:00:00Z<br> Maximum_temperature#long_name=Maximum_temperature @ height_above_ground<br> Maximum_temperature#units=K<br> Maximum_temperature#missing_value=nan<br><br>...<br>
<br>time1#_CoordinateAxisType=Time<br> Lambert_Conformal#grid_mapping_name=lambert_conformal_conic<br> Lambert_Conformal#standard_parallel=25<br> Lambert_Conformal#longitude_of_central_meridian=265<br> Lambert_Conformal#latitude_of_projection_origin=25<br>
Lambert_Conformal#earth_shape=Earth spherical with radius specified by producer<br> Lambert_Conformal#spherical_earth_radius_meters=6.3712e+06<br> Lambert_Conformal#GRIB_param_Dx=5079.36<br> Lambert_Conformal#GRIB_param_Dy=5079.47<br>
Lambert_Conformal#GRIB_param_GDSkey=801839731<br> Lambert_Conformal#GRIB_param_La1=20.192<br> Lambert_Conformal#GRIB_param_LaD=25<br>**<br> Lambert_Conformal#GRIB_param_Latin1=25<br> Lambert_Conformal#GRIB_param_Latin2=25<br>
** <br> Lambert_Conformal#GRIB_param_Lo1=238.446<br> Lambert_Conformal#GRIB_param_LoV=265<br> Lambert_Conformal#GRIB_param_NpProj=true<br> Lambert_Conformal#GRIB_param_Nx=1073<br> Lambert_Conformal#GRIB_param_Ny=689<br>
Lambert_Conformal#GRIB_param_ProjFlag=0<br> Lambert_Conformal#GRIB_param_Quasi=false<br> Lambert_Conformal#GRIB_param_ResCompFlag=8<br> Lambert_Conformal#GRIB_param_SpLat=-90<br> Lambert_Conformal#GRIB_param_SpLon=0<br>
Lambert_Conformal#GRIB_param_VectorComponentFlag=gridRelative<br> Lambert_Conformal#GRIB_param_Winds=Relative<br> Lambert_Conformal#GRIB_param_grid_name=Lambert_Conformal<br> Lambert_Conformal#GRIB_param_grid_radius_spherical_earth=6.3712e+06<br>
Lambert_Conformal#GRIB_param_grid_shape=Earth spherical with radius specified by producer<br> Lambert_Conformal#GRIB_param_grid_shape_code=1<br> Lambert_Conformal#GRIB_param_grid_type=30<br> Lambert_Conformal#GRIB_param_grid_units=m<br>
Lambert_Conformal#_CoordinateTransformType=Projection<br> Lambert_Conformal#_CoordinateAxisTypes=GeoX GeoY<br>Corner Coordinates:<br>Upper Left ( -1592.424, 2268.326) <br>Lower Left ( -1592.424, 2232.770) <br>
Upper Right ( -1561.948, 2268.326) <br>Lower Right ( -1561.948, 2232.770) <br>Center ( -1577.186, 2250.548) <br>Band 1 Block=6x1 Type=Float32, ColorInterp=Undefined<br><br>...<br><br>I am curious where this discrepancy is taking place. I kind of think it is a typo or a mistake from the data server, but I can't peg it down. Any thoughts? Thanks.<br>
<br>kss<br clear="all"><br># ===================<br>Kyle Shannon<br>Physical Science Technician<br>RMRS Fire Sciences Lab<br>Fire, Fuels & Smoke - RWU 4405<br>5775 Highway 10 W.<br>Missoula, MT 59808<br>(406)646-6577<br>
<a href="mailto:kshannon@fs.fed.us" target="_blank">kshannon@fs.fed.us</a><br><a href="mailto:ksshannon@gmail.com" target="_blank">ksshannon@gmail.com</a><br># ===================<br>