O&M observation types (OGC, ISO/TC211) O&M Observation types 2.0 Observation and Measurement types defined in OGC 10-004 'Observations and Measurements' (ISO 19156:2011) clause 7 'Specialized observations'. Open Geospatial Consortium OGC Naming Authority 2.0 307 2014-09-03T09:52:34.222Z 2