vertical datum metadata & observational display

[rluettich]

Some of our model results are in a tidal datum (typically Mean Sea Level) and others are in a geodetic datum (typically NAVD88). We need to capture model metadata regarding the model datum (assuming it is available - if not we need to figure out how to transmit this metadata) and then use this when we are querying observations so that we are comparing model output and observations in the same datum. Note, most (all?) NOAA gauges have observations in both Mean Sea Level and NAVD88. However, we need to know which one to query and use on time series plots.

[PhillipsOwen]

this issue appears to be misplaced. this is not a UI issue (yet).

[BrianOBlanton]

for the time series plotting / charting, I don't think this is very hard. we just need:

1. a table of the datum translation at each station
2. add a property to the run.properties that specifies the vertical datum that the ADCIRC grid is in.

then, this adjustment can happen "on the fly".

However, for the rasterized surfaces, the solution is not so straight-forward, and we cannot do this in the current year 10...

[BrianOBlanton]

flowchart / diagram

[PhillipsOwen]

this was accomplished in the DB and UI Data app.

further testing using an actual datum run property is required.