Dan Ponti

Thanks for the reference, Mikhail, I'll read it and comment. Your responses above I think reflect that we are thinking along the same lines. Again, I understand the O&M concept...

@neilchadwick-dg - This is how DIGGS handles this and I think it works especially well for cores: The SamplingActivity is the place where core run/recovery would be recorded eg., the...

I would suggest that option 2 above is the cleanest way to handle measurement values where there may be a unit, and wheer applicable, a reason for a null value,...

Yes it does seem that hydrogeounit may not be necessary when we have two common terms to define the types of hydrogeological units included in the definition (aquifer and groundwater...

Here's a cut at parsing out the descriptions attached. I noticed some errors in the original document w/respect to some terminology and formulas. I've corrected them and the original document...

Of the alternatives posted by @mbeaufils, I prefer alternative 2 where the results recorded as part of the procedure that are intermediate to the primary observation result are accessible within...

One 3D geologic modeling package I am familiar with is EarthVision, which can be used to construct, visualize and query geologic structure models (with unit volumes, surfaces and faults) as...

It seems to me that an observer is an integral component of the process of an observation (like a procedure), - an observation is performed by someone or something and...

_An observation can be associated to 0..* Observer_ That's good. This allows for encoding an Observation where who or what made the observation is unknown or unclear.

What is (or is there) the distinction between an observation and a measurement? DIGGS uses these terms (probably incorrectly) to distinguish between observations that produce non-parametric or "subjective" or interpreted...