The proxy server received an invalid
response from an upstream server.
The proxy server could not handle the request GET /dataset/dataset/h05180-nos-hydrographic-survey-1931-12-31/resource/5ff4baac-c19a-4fe1-b4ba-1c268bdaf9a7.
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.