World Water Online Proposing A Distributed System for Global Water Information Presented by:...
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World Water Online Proposing A Distributed System for Global Water Information Presented by: Fernando R. Salas Prepared by: Fernando R. Salas and David R. Maidment University of Texas at Austin GEOSS Standards and Interoperability Forum October 18 th , 2011 WWO
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Transcript of World Water Online Proposing A Distributed System for Global Water Information Presented by:...
World Water OnlineProposing A Distributed System for Global Water Information
Presented by: Fernando R. SalasPrepared by: Fernando R. Salas and David R. MaidmentUniversity of Texas at AustinGEOSS Standards and Interoperability ForumOctober 18th, 2011
WWO
World Water Online within the GEOSS Framework
We Collect Lots of Observations Data in Hydrology
Water Quantity Rainfall Soil Water
Water Quality Meteorology Groundwater
…The Consortium of Universities for the Advancements of Hydrologic Science Inc. (CUAHSI) is a consortium of 125 universities
working together to advance hydrologic science in the United States…
http://his.cuahsi.org
How the Web Works
HTML – web language for text
and pictures
Catalog
BrowserWeb Server
Harv
estin
g Search
Access
Services Oriented Architecture for Water Data
WaterML – web language for water
data
Catalog
UserServer
Harv
estin
g Search
Access
WaterML as a Web Language
Discharge of the San Marcos River at Luling, TX June 28 - July 18, 2002
USGS Streamflow data in WaterML
The USGS now publishes its time series data as WaterML web services
CUAHSI Water Data Services Catalog
69 public services18,000 variables1.9 million sites23 million series
5.1 billion data valuesAnd growing
All the data comes out in WaterML
The largest water datacatalog in the world
Open Geospatial Consortium – Web Service Standards
• Map Services
• Web Map Service (WMS)• Web Feature Service (WFS)• Web Coverage Service
(WCS)• Catalog Services for the Web
(CS/W)
• Observation Services
• Observations and Measurements Model
• Sensor Web Enablement (SWE)• Sensor Observation Service
(SOS)• WaterML2 – Fall 2011
Web Services Stack for Time Series
OGC Catalog Service for the Web with standard metadata: ISO, Dublin Core, ..
Time Series Services
Catalog (CSW)
Metadata (WFS)
Data (WaterML)
Who? What?
Where? When?
Access Data
Water Agency StacksEach Agency Maintains Their Own Data and Metadata
USGS NCDC TWDB
MetaCatalog is a listing of the URL addresses of all agency catalogs
Structure is similar to GEOSS
Searching Federal, State and Local Data
Catalog
Metadata
We Study the Earth System
World Water Online
Models
Water
Climate
Geospatial
Flooding, Water Availability, Water Quality
Observation Sites, Structures, Streamflow, Groundwater, Water Quality
Temperature, Evaporation, Precipitation, Soil Water, Solar Radiation
Elevation, River Networks, Watersheds, Land Cover, Land Use
Inspired by Rob Vertessy, CSIRO, Australia
World Water Online
Climate Data• Many groups distribute climate
data (national and global data)• Precipitation, Evaporation,
Temperature etc.• Observations (i.e. GPCC),
Remote Sensing, Models/Reanalysis (i.e. CFSR) and Predictions (i.e. IPCC)
• Which products should be used within a global system?
The Digital Divide
Geographic Information Systems (GIS)
Climate Observations and Grids
Remote Sensing
Observations and Time Series
Interoperability Challenges
Observations Data
• Measures variables over a discrete space-time domain
• Stored in tables, relational databases and geodatabases
Gridded Data
• Measures variables over a continuous space-time domain
• Stored in large multi-dimensional arrays in specialized formats
How can we connect these very different worlds together?
Observations Data Information Model
Data Source United States Geological Survey (USGS)
Network National Water Information System – Unit Values
Sites Colorado River at Austin
Variables Streamflow
Values 2,500 cfs at 8:30 am onJune 19th, 2011
Multisensor Precipitation Estimate (MPE) West Gulf River Forecast Center
Exported by NWS to CUAHSI Observations Data Model and WaterML web services at University of Texas at Arlington
Capital Area Council of Governments (CAPCOG)
19
Situational Awareness for Flash Flooding in the CAPCOG region
Combines federal, river authority, city and water district data ….…. to support real-time flood emergency response 20
National Weather Service,USGS, Corps of Engineers
Rainfall in Cypress Creek WatershedDrainage area – 38 Sq. Mi.
“Virtual Rain Gages”— Nexrad Radar Rainfall points
Time Series of Rainfall
Data obtained via WaterML web service from NWS and UT Arlington 21
Data Source National Climatic Data Center (NCDC)
Dataset North American Regional Reanalysis (NARR)
Grid Size 32 kilometer
Variables Temperature
Values78 deg. Fahrenheit at 8:00 am onJune 15th, 2000
Gridded Data Information Model
Time 1
NARR
WFS
WFS
Building a Series Catalog for Observations Data
Datacart – a collection of data series organized thematically
Observations Metadata Catalog- Source- Site Name- Location (Lat/Long)- Variable Name- Variable Units- Concept- Start Date- End Date- WaterML URI
WFSWFS
WFSWFS
Building a Series Catalog for Gridded Data
Datacart – a collection of data series organized thematically
Observations Metadata Catalog- Source- Coverage Name- Location (Lat/Long Box)- Variable Name- Variable Units- Concept- Start Date- End Date- WCS URI
Services Stack Framework
• Catalog Services for the Web (CSW) enable metadata services describing observations data to be registered in a catalog of services.
• Web Feature Services (WFS) enable data services to be completely described by metadata in a series catalog.
• Sensor Observation Services (SOS) and Web Coverage Services (WCS) enable observations and climate data to be conveyed through the internet in a standardized manner.
Catalog
Metadata
Data
Services
CSW
WFS
SOS
Catalog
Metadata
Data
Services
CSW
WFS
WCS
Building a Catalog of Services
WFS
WFS
CSWTime Series Raster Series
THREDDS ServersHydroServers
WaterML
NetCDF
One Common Ontology
CUAHSIOntology
Precipitation Precipitation
Streamflow
Turbidity SnowCloud Cover
PrecipRainfallRainTotal Precip
PrecipRainfall
RainTotal Precip
HydroPortal – A Catalog Service
…enables data discovery across multiple data sources and types…
Geoportal Extension of ArcGIS implements Catalog Services for the Web (CSW)
• Lots of geospatial data available• Organized at national and global scales
• GIS is moving to the web – desktop to websites• ESRI has created ArcGISOnline - a platform for sharing geospatial
data (features, rasters, maps, databases etc.)• Publish, manage, share, discover, access
• ArcGIS World Elevation Services
Geospatial Data
IntelligentWeb Maps
Geospatial Data for the World• Global Elevation Data
• 90 meter, 30 meter, 5 meter• National and International River
Networks• Geometry (xy coordinates),
Logic (topology) and Address (linear referencing)
• Cell to cell, line to line, polygon to line
• Global delineation services• Watersheds and catchments
Water Data via The Web• Elevation Data Services
• Watershed• River Network• Cross-Sections
• Climate Data Services• Observation Data Services
• Precipitation• Streamflow
• Modeling
World Water Online
Models
Water
Climate
Geospatial
Flooding, Water Availability, Water Quality
Observation Sites, Structures, Streamflow, Groundwater, Water Quality
Temperature, Evaporation, Precipitation, Soil Water, Solar Radiation
Elevation, River Networks, Watersheds
Inspired by Rob Vertessy, CSIRO, Australia
World Water Online
National Water Resources Information System
Template
World Water Online
World Water Online
