Categorize	URL
institution	http://coastwatch.pfeg.noaa.gov/erddap/categorize/institution/index.xhtml
ioos_category	http://coastwatch.pfeg.noaa.gov/erddap/categorize/ioos_category/index.xhtml
long_name	http://coastwatch.pfeg.noaa.gov/erddap/categorize/long_name/index.xhtml
standard_name	http://coastwatch.pfeg.noaa.gov/erddap/categorize/standard_name/index.xhtml