The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/h12384-nos-hydrographic-survey-florida-keys-national-marine-sanctuary-florida-2011-11-15/resource/046efff7-160e-476b-8f16-40af8a67b6a8.
Reason: DNS lookup failure for: os-data-catalog.ngdc.noaa.gov
Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.