Scenario 2A Waves Progress

[Bobfrat]

Progress: 2A Waves

Successes

• Observation datasets containing wave parameters including significant wave height, period, and direction were discovered, accessed, and plotted for multiple stations.
• Forecast model datasets were discovered, accessed, and plotted for points near the observation stations.
• Catalog-driven search using OGC CSW allowed for dynamic updating as new datasets become available (or inactive).
• Data from both OPeNDAP-CF and SOS endpoints were discovered, accessed and used. The accessing of SOS endpoint leveraged IOOS driven tools (PYOOS).
• Standards-based tools allowed extraction of both unstructured and structured grid model output without any model specific code, courtesy of the British Met Office Iris package.
• An inline interactive map interface was added to the iPython notebook to display the locations of observation data meeting the record length criteria (Figure 1).
• Time series plots were created visualizing wave height and period for those stations containing valid wave data (Figure 2).

Figure 1: Example inline map showing all the observation points within a bounding box

Figure 2: Time series plot of significant wave height and peak period for identified stations.

Figure 3: Time series plot of modeled vs observed significant wave height.

Easy Challenges: Identified and Fixed

• The NDBC and COOPS SOS services allow only 31 days of data to be extracted per request (#81). For this notebook, the time series plots were done for a 2 week span but multiple requests can be used to extract time series greater than 31 days.

  Longer-term Challenges Identified

• NOAA's NDBC SOS service not discoverable via NGDC catalog #83 because NDBC's SOS is not exposed in the same manner as other SOS endpoints, and the catalog reindex process filters it out as not having any interesting URLs.
• The Pyoos collector used to extract observation data needs to be specified at the time of initialization https://github.com/ioos/system-test/issues/94, and does not perform a bounding box search https://github.com/ioos/system-test/issues/73. The Pyoos bounding box issue has been fixed, but not implemented yet. The SOS service is still being used to determine the bounding box contents.

[daf]

Minor clarification, bbox support in Pyoos is completed but not in a packaged release. I can make a point release containing this feature to support this effort this afternoon if desired.

[birdage]

@daf that might be handy as we are doing a number of work arounds for BBox right now. Would it just be an install from the git repo?

[daf]

Yes, you can do that right now: ioos/pyoos@1e7f5fe1aaacf

[birdage]

@daf, nice so i can do a pip install from the git repo?