Get spatial and temporal bounds from datasets listed in a catalog using NCSS

Find Datasets in Catalog.ipynb

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   "source": [
    "from siphon.catalog import TDSCatalog\n",
    "from siphon.ncss import NCSS"
   ]
  },
  {
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   "source": [
    "# turn off noisy logging - fixed in PR https://github.com/Unidata/siphon/pull/127\n",
    "import logging\n",
    "log = logging.getLogger().setLevel(logging.ERROR)"
   ]
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   "source": [
    "# read catalog\n",
    "cat_url = 'http://www.star.nesdis.noaa.gov/thredds//catalog/swathNPPVIIRSL2WW00/2017/108/catalog.xml'\n",
    "viirs_swath_cat = TDSCatalog(cat_url)"
   ]
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     "text": [
      "VRSVCW.B2017108.001304.nc\n",
      "   %s {'west': -174.8323, 'east': -126.6557, 'south': -58.2421, 'north': -46.5352}\n",
      "   %s {'begin': '2017-04-18T00:13:48.904Z', 'end': '2017-04-18T00:13:48.904Z'}\n",
      "\n",
      "VRSVCW.B2017108.001429.nc\n",
      "   %s {'west': -174.3289, 'east': -130.9466, 'south': -53.3018, 'north': -42.2289}\n",
      "   %s {'begin': '2017-04-18T00:15:14.309Z', 'end': '2017-04-18T00:15:14.309Z'}\n",
      "\n",
      "VRSVCW.B2017108.001554.nc\n",
      "   %s {'west': -174.1979, 'east': -134.5475, 'south': -48.3689, 'north': -37.795}\n",
      "   %s {'begin': '2017-04-18T00:16:39.714Z', 'end': '2017-04-18T00:16:39.714Z'}\n",
      "\n"
     ]
    }
   ],
   "source": [
    "# get spatial and temporal bounds for each dataset\n",
    "datasets = list(viirs_swath_cat.datasets)\n",
    "# let's just look at the first 3 datasets\n",
    "for ds_name in datasets[0:3]:\n",
    "    ds = viirs_swath_cat.datasets[ds_name]\n",
    "    ncss_access_url = ds.access_urls['NetcdfSubset']\n",
    "    ncss = NCSS(ncss_access_url)\n",
    "    print(ds_name)\n",
    "    print('   %s', ncss.metadata.lat_lon_box)\n",
    "    print('   %s', ncss.metadata.time_span)\n",
    "    print('')\n",
    "    # now you can to checking to see if a given ds is within your lat/lon/time of interest"
   ]
  }
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