CUAHSI Hydrologic Information System an introduction Ilya Zaslavsky Director, Spatial Information Systems Lab San Diego Supercomputer Center University of California San Diego Presentation at DID Data Management, Kuala Lumpur, Malaysia, July 24, 2009
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CUAHSI Hydrologic Information System an introduction Ilya Zaslavsky Director, Spatial Information Systems Lab San Diego Supercomputer Center University.
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CUAHSI Hydrologic Information System
an introduction
Ilya Zaslavsky
Director, Spatial Information Systems LabSan Diego Supercomputer CenterUniversity of California San Diego
Presentation at DID Data Management, Kuala Lumpur, Malaysia, July 24, 2009
An online distributed system to support the sharing of hydrologic data from multiple repositories and databases via standard water data service protocols;
software for data publication, discovery, access and integration.
What is CUAHSI HIS?
Observation Stations
Ameriflux Towers (NASA & DOE) NOAA Automated Surface Observing System
USGS National Water Information System NOAA Climate Reference Network
Map for the US
Build a common window on water data using web services
Rainfall & SnowWater quantity
and quality
Remote sensing
Water Data
Modeling Meteorology
Soil water
Sources of Observations Data
Point Water Observations Time Series
A point location in space A series of values in time
Getting Water Data (the old way)Different Query Pages Different Query Responses
Web Pages and Web Serviceshttp://www.safl.umn.edu/ http://his.safl.umn.edu/SAFLMC/cuahsi_1_0.asmx
Uses Hypertext Markup Language (HTML)Uses WaterML
(a Markup Language for water data)
HTML as a Web Language
Text and Picturesin Web Browser
<title>Texas Water Development Board</title><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <meta name = "Robots" content = "index,follow"> <meta name = "Priority" content = "home,twdb,homepage"> <meta name = "Author" content = "Texas Water Development Board, Agency Number 580"> <meta name = "Title" content = "Texas Water Development Board"> <meta name = "Description" content = "Texas Water Development Board Home Page"> <meta name = "Keywords" content = "water,drought,rain,conservation,groundwater,surfacewater,lake,reservoir,hydrology,geology,desalination,TWDB,loans,grants,wastewater,sewage,Clean Water,Drinking Water,State Revolving Fund,planning,State Water Plan,GIS,Geographic Information Systems,Mapping,data">
HyperText Markup Language
WaterML as a Web LanguageDischarge of the San
Marcos River at Luling, June 28 - July 18, 2002
Streamflow data in WaterML language
Point Observations Information Model
Data Source
Network
Sites
Variables
Values
{Value, Time, Metadata}
Utah State Univ
Little Bear River
Little Bear River at Mendon Rd
Dissolved Oxygen
9.78 mg/L, 1 October 2007, 5PM
• A data source operates an observation network• A network is a set of observation sites
• A site is a point location where one or more variables are measured• A variable is a property describing the flow or quality of water
• A value is an observation of a variable at a particular time• Metadata provide additional information about the value
GetSites
GetSiteInfo
GetVariableInfo
GetValues
WaterOneFlow Service
Site Codes
Variable Codes
Date Ranges
WaterML and WaterOneFlow
GetSitesGetSiteInfoGetVariableInfoGetValues
WaterOneFlowWeb ServiceClient
DEC
UVMUSGS
DataRepositories
Data
DataData
EXTRACTTRANSFORMLOAD
WaterML
WaterML is an XML language for communicating water dataWaterOneFlow is a set of web services based on WaterML
Supports search by location and type of data across multiple observation networks including NWIS, Storet, and academic data
Against the NIH Syndrome2006:► CUAHSI HIS web services are discussed on the BASINS mailing list as a
new way to access hydrologic data. The list is mostly used by hydrologists and developers outside academia;
► NCDC develops ASOS web services following WaterML2007: ► MOU with USGS; USGS is developing WaterML-compliant GetValues
service;► GLEON uses an early version of ODM to develop their own schema
(VEGA);► Phoenix LTER is developing ODM (in MySQL) and WaterML services (in
Java);► A Google Earth-based client for CUAHSI web services is developed at
CSIRO, Australia;► Deployment to 11 hydrologic observatory test beds, + CBEO (CEOP
project)2008-2009: ► KISTERS develops WaterML-compliant web services over their database;► Workshops at state agencies► MapWindow open source GIS develops WaterOneFlow parsers;► Florida, Texas and Idaho use ODM and WaterOneFlow web services to
provide access to state data repositories; New Jersey is considering the same;
► Another CEOP project, at UC-Davis, is implementing ODM (in Postgres) and web services (in Java);
► Stroud Water Research Center; WRON; CZO; … many that we don’t know…
► Now SBRP: data from UCSD, UA, more?► Integration with streaming data middleware (Open Source Data Turbine)
The International Workshop on Hydrologic Data Management and
Modeling in South East AsiaJuly 20-24
University of Malaya
Learning how the system works
Publishing hydrologic data
Setting up a server for SEA
Already published: sample data from JPS (Malaysia) and from Indonesia
Data published as web service:http://svctag-2z3322s/jps/cuahsi_1_0.asmx
These are results of GetValues for JPS:3116434, Streamflow data
In HydroExcel
Charts of the same dataIn HydroExcel
Area of interest In HydroSeek
Finding JPS stationsIn HydroSeek
More information about JPS stationsIn HydroSeek, and data download
JPS data downloaded from HydroSeek
Zooming in on Indonesia
Looking for COD measurementsIn HydroSeek
Zooming in to stations
Summary• CUAHSI HIS = Cyberinfrastructure for managing and
publishing observational data– Supports many types of point observational data– Overcomes syntactic and semantic heterogeneity using a standard
data model and controlled vocabularies– Supports a national network of observatory test beds– Maintains national registry of services (1.75 million stations – the
largest in the world)
• WaterML is a standard language for consistently communicating water observations data from academic and government sources using web services; already adopted by several federal agencies. Joint WMO and OGC activity to enhance it.
• The system is already deployed at multiple locations• It is free and open source