Hi TDS folks, I'm seeing a strange problem with some of our new regridded ROMS ocean forecast models that I'm hoping somebody can help me with. At certain time steps, some regions are displaying values of 9.96921E36. From my understanding, this is the value assigned (by NetCDF?, OPeNDAP?, TDS?) when there was no data value. However, I can confirm in each of my NetCDF files that the same slices contain valid data values. So the problem seems to stem from the TDS side of things, where I am serving these as a Forecast Model Run Collection (FMRC). Furthermore, I have already assigned a _FillValue and missing_value of NaN, so the 9.96921E36 issue is something else. More pieces to the puzzle are: (1.) no matter what file I test with, it always occurs at the same time steps and regions; (2.) it shows up in all variables (temp, salt, u, v); (3.) you can see this in Godiva2/ncWMS, NetCDF Subset Service, and OPeNDAP. Ideas?? I'm stumped. Here is my TDS testbed for this; I have been focusing specifically on the Best Time Series: http://oos.soest.hawaii.edu/thredds-test/catalog/hioos/roms_forec/hiig/catalog.html Godiva2 will show you an example of the problem if you navigate to sea_water_potential_temperature on Feb 19 2014 at 18:00 at 0.25 meters depth. As shown in the example image attached, there is a black rectangle in the southeast corner where the values are all 9.96921E36. You can click there to confirm this value is returned. (Strangely the "test image" for the same day does not have this problem...) Here is an OPeNDAP call within that same time/lat/lon/depth which shows the 9.96921E36 values: http://oos.soest.hawaii.edu/thredds-test/dodsC/hioos/roms_forec/hiig/ROMS_Hawaii_Regional_Ocean_Model_best.ncd.ascii?temp[14][0][0:1:10][284:1:294] I have staged a gzipped NetCDF file (1.4 GB) and TDS catalog via ftp for you to test with: ftp.soest.hawaii.edu user: anonymous pass: <your e-mail address> cd jmaurer/unidata/ get ocn_mod_hiig.xml get hiig_forec_20140208.nc.gz Thanks in advance for your time on this! Cheers, John Maurer Pacific Islands Ocean Observing System (PacIOOS) University of Hawaii at Manoa
Attachment:
hawaii_roms_godiva2_201402091800.png
Description: PNG image
thredds archives: