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10.2 US Scenario
The US scenario involved adding a new WaterML2 Part 2 compliant interface to the existing USGS ratings depot, which aggregates all active ratings from 45 Water Science
Center databases nationwide and makes them available via a public-facing web service. The existing USGS production ratings service supports approximately 35,000 public
requests per day primarily by the National Weather Service and US Army Corps of Engineers but also by various utilities, commercial interests, and academic institutions.
The development of WaterML2.0 part 2 is important, as the USGS has begun converting its timeseries data processing from a legacy system developed in-house to a new
commercial product, which does not support the oldexisting rating-file format. Deployment of the new data-processing system is slated for late summer 2015 at which
time the WaterML2 part 2 standard will be the only format offered to the public from the USGS ratings depot.
The US scenario made use of the CSIRO validation and visualization clients.
10.3 UK Scenario
The UK’s Centre for Ecology and Hydrology CEH hosts the UK National River Flow Archive, which includes a national dataset of peak flow data and associated ratings. This
data is available via web-services but only to facilitate display. Future users would be expected to access the web-services via clients for which a standard would be beneficial.
The scenario involved testing the part 2 model as a mechanism for publishing data online,
CSIRO RGS API KISTERS API
Aquatic Informatics API
«Database»
NSW Office of Water
«Database»
Vic DEPI
«Database»
Tas DPIPWE Bureau of Meteorology retriev al
Hydstra Ratings Sensor
Observ ation Serv ice
WaterML2.0 part 1 - timeseries
«use»
«fl ow» «fl ow»
«fl ow» «fl ow»
«use» «use»
«fl ow»
«fl ow»
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with the goal of enabling users to explore data and understand the implications of ratings on flow data. An API was built on the existing service infrastructure already contains
some JSON APIs to expose the WaterML2.0 part 2 API.
Example html page: http:www.ceh.ac.ukdatanrfadatapeakflow.html?27080
Example web-service: http:www.ceh.ac.uknrfajsonhiflows-ratings?station=27080
The CEH scenario made use of the CSIRO validation and visualization clients. Whilst the range-values aspect of the part 2 model was not implemented, it was assessed
for applicability to the range of rating metadata including equations and extrapolation information that is often used for qualitative assessment of ratings.
10.4 Validation and Visualisation