Category URL
altitude http://tds.vims.edu:8080/erddap/categorize/standard_name/altitude/index.xhtml?page=1&itemsPerPage=1000
latitude http://tds.vims.edu:8080/erddap/categorize/standard_name/latitude/index.xhtml?page=1&itemsPerPage=1000
longitude http://tds.vims.edu:8080/erddap/categorize/standard_name/longitude/index.xhtml?page=1&itemsPerPage=1000