On 10/28/2010 4:17 PM, Ying at NCCS wrote:
Hi John,
I run into this problem using netcdf-java toolsUI to open either
local netcdf-4 file or via opendap, here is an example link
http://esg.nccs.nasa.gov/thredds/catalog/ying/readonly/catalog.html?dataset=ying/readonly/e562p1_fp.inst3_3d_asm_Nv.20100907_00z%2B20100909_1200z.nc4
it just shows all -Infinity on the color-bar.
I was first having trouble to use NASA GISS Panoply (which uses
netcdf-java), then I tried this recent version of netcdf-java 42.
ToolsUI (downloaded from UNIDATA) --- it can read netcdf-4 file (the
above link) but it shows same max and min values of each variable. As
a result, it just gives a blank plot.
Then I tried toolsUI-4.2.jar and it shows the same problem.
ftp://ftp.unidata.ucar.edu/pub/netcdf-java/v4.2/toolsUI-4.2.jar
by the way, I can use Ferret (most recent version) to open this
netCDF-4 file and makes right plots.
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Hi Ying:
that file has this attribute on the data variables:
:valid_range = 9.9999999E14f, 9.9999999E14f; // float
this is a mistake, it says that there are no valid values. if it can be
removed from the file, it will work. can you contact the file author to
have it removed?
looking at a random variable:
float SLP(time=1, lat=721, lon=1152);
:_CoordinateAxes = "time lat lon ";
:long_name = "sea_level_pressure";
:units = "Pa";
:_FillValue = 9.9999999E14f; // float
:missing_value = 9.9999999E14f; // float
:fmissing_value = 9.9999999E14f; // float
:scale_factor = 1.0f; // float
:add_offset = 0.0f; // float
:standard_name = "sea_level_pressure";
:vmin = 9.9999999E14f; // float
:vmax = 9.9999999E14f; // float
:valid_range = 9.9999999E14f, 9.9999999E14f; // float
i would say that it would be better to have:
float SLP(time=1, lat=721, lon=1152);
:long_name = "sea_level_pressure";
:units = "Pa";
:_FillValue = 9.9999999E14f; // float
:fmissing_value = 9.9999999E14f; // float
:standard_name = "sea_level_pressure";
:vmin = 9.9999999E14f; // float
:vmax = 9.9999999E14f; // float
John
