Using Javascript To Make Parallel Server Requests THREDDS OPeNDAP

For the following THREDDS OPeNDAP server: http://data.nodc.noaa.gov/thredds/catalog/ghrsst/L2P/MODIS_T/JPL/2015/294/catalog.html I would like to note four Attributes of every file

Solution 1:

You can use the THREDDS DAS service. DAS

Change the OPenDAP link you have above replacing the .html extension with .das This is a small text file with metadata about the file which could be easily parsed with javascript and includes a section with the global attributes:

 NC_GLOBAL {
    . . .
    Float32 northernmost_latitude 89.9942;
    Float32 southernmost_latitude 66.9853;
    Float32 easternmost_longitude -121.445;
    Float32 westernmost_longitude 76.7485;
    . . .
  }

This metadata is cached by THREDDS and the above DAS link responds instantly.

Edit:

Re: the correct comments below, (cache exists only after the first request) one alternative might be to use the source data at the NASA JPL OPeNDAP Server (Hyrax): http://podaac-opendap.jpl.nasa.gov/opendap/allData/ghrsst/data/L2P/MODIS_T/JPL/

My browser only tests (i.e. subjective) seem to show that a random DAS responses are quicker, than 15 seconds.

http://podaac-opendap.jpl.nasa.gov/opendap/allData/ghrsst/data/L2P/MODIS_T/JPL/2015/294/20151021-MODIS_T-JPL-L2P-T2015294084500.L2_LAC_GHRSST_N-v01.nc.bz2.das