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Hi all, here are some tests we did regarding the NetCDF Subset Service for curvilinear grid as point data issue and could be helpful: If you sent this opendap request: http://oos.soest.hawaii.edu/thredds/dodsC/hioos/roms_forec/hiog/runs/HI-ROMS_Forecast_Model_Run_Collection_RUN_2011-04-14T00:00:00Z.ascii?lon_rho[46][60],lat_rho[46][60] you qet these lon/lat values:-157.495325318087, 21.292617472685 if you use them in a NCSS request like that: http://oos.soest.hawaii.edu/thredds/ncss/grid/hioos/roms_forec/hiog/runs/HI-ROMS_Forecast_Model_Run_Collection_RUN_2011-04-14T00:00:00Z?var=temp&latitude=21.292617472685&longitude=-157.495325318087&time_start=2011-04-14T00%3A00%3A00Z&time_end=2011-04-21T00%3A00%3A00Z&temporal=point&time=2011-04-14T00%3A00%3A00Z&vertCoord=-0.983333333333333&accept=xml&point=true the lon/lat you get is: -157.622435719315, 21.1940855899557 so now, if we swap the lon_rho and lat_rho indices and send this request: http://oos.soest.hawaii.edu/thredds/dodsC/hioos/roms_forec/hiog/runs/HI-ROMS_Forecast_Model_Run_Collection_RUN_2011-04-14T00:00:00Z.ascii?lon_rho[60][46],lat_rho[60][46] we get...-157.622435719315, 21.1940855899557 (as in the NCSS request!!) And the last one, eta_rho is a 170 length array and xi_rho is an 70 length array, so let's choose a point with an index bigger than 69 for the eta_rho and send a request: http://oos.soest.hawaii.edu/thredds/dodsC/hioos/roms_forec/hiog/runs/HI-ROMS_Forecast_Model_Run_Collection_RUN_2011-04-14T00:00:00Z.ascii?lon_rho[70][60],lat_rho[70][60] we get: -157.708182949237, 21.3033444376878 and once again if we put that on the NCSS request: http://oos.soest.hawaii.edu/thredds/ncss/grid/hioos/roms_forec/hiog/runs/HI-ROMS_Forecast_Model_Run_Collection_RUN_2011-04-14T00:00:00Z?var=temp&latitude=21.3033444376878&longitude=-157.708182949237&time_start=2011-04-14T00%3A00%3A00Z&time_end=2011-04-21T00%3A00%3A00Z&temporal=point&time=2011-04-14T00%3A00%3A00Z&vertCoord=-0.983333333333333&accept=xml&point=true what I get here is a 500 - Internal server error, and I guess there will be an ArrayIndexOutOfBoundsException in the threddsServlet.log So I think it only returns data for requests where the lat/lon matches points where, in this case, we have both indices for eta_rho, and xi_rho lower than 70, and it fails any other case. Cheers!
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