If you're not familiar with the OGC/W3C Observation and Measurement(O&M)/Semantic Sensor Network (SSN)/Sensor, Observation, Sample, Actuator (SOSA) models, here's a great overview by Simon Cox, one of the principal instigators. https://youtu.be/BHBU5gYAmV4. It was presented to a soils information group, but the general stuff at the beginning is quite relevant for any environmental data. Well worth the time to watch. Stephen M. Richard US Geoscience Information Network (USGIN) <mailto:smrTucson@gmail.com> smrTucson@gmail.com 520-869-8545