Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
On Tue, 5 Jan 2010, Kyle Shannon wrote:
Hello all, I am using the unidata thredds server to download some NDFD data. I noticed that the projection specified is a Lambert_Conformal_Conic_2SP and both standard parallels are specified as 0. In the metadata, if I am reading it correctly, the projection is actually a Lambert_Conformal_Conic_1SP with a standard parallel of 25. I am using GDAL to hangle the files and proj4 has trouble with the 1st scenario, but not the second. Is the projection set at the source (NOAA NDFD) or by the NetCDF subsetting service? Who can I contact to deal with this issue? Thanks.
Kyle,The projection information is obtained from the data, so the source is NCEP NDFD. The NCEP Lambert conformal projection is described at:
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_temp3-30.shtmlIncluded is the GDS information from today's 12Z NDFD file and the standard parallels are set to 25 not 0.
I will check that the subsetting service is getting the information correctly.
Robb... GDSkey = 801839731 grid_type = 30 grid_name = Lambert_Conformal grid_shape_code = 1 grid_shape = Earth spherical with radius specified by producer grid_radius_spherical_earth = 6371200.0 Quasi = false Nx = 1073 Ny = 689 La1 = 20.192 Lo1 = 238.446 ResCompFlag = 8 Winds = Relative VectorComponentFlag = 1 LaD = 25.0 LoV = 265.0 Dx = 5079.3613 Dy = 5079.472 grid_units = m ProjFlag = 0 NpProj = true Latin1 = 25.0 Latin2 = 25.0 SpLat = -90.0 SpLon = 0.0
kss # =================== Kyle Shannon Physical Science Technician RMRS Fire Sciences Lab Fire, Fuels & Smoke - RWU 4405 5775 Highway 10 W. Missoula, MT 59808 (406)646-6577 kshannon@xxxxxxxxx ksshannon@xxxxxxxxx # ===================
=============================================================================== Robb Kambic Unidata Program Center Software Engineer III Univ. Corp for Atmospheric Research rkambic@xxxxxxxxxxxxxxxx WWW: http://www.unidata.ucar.edu/ ===============================================================================
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