World Water Online

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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


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

Browser

Web Server

Access

Services Oriented Architecture
for Water Data

WaterML


web
language for water
data

Catalog

User

Server

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 services

18,000 variables

1.9 million sites

23 million series

5.1 billion data values

And growing

All the data comes out in
WaterML

The largest water data

catalog 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 Stacks

Each 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 on

June 19
th
, 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 Watershed

Drainage 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

Values

78 deg. Fahrenheit

at 8:00 am on

June 15
th
, 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

WFS

WFS

WFS

WFS

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

CSW

Time Series

Raster Series

THREDDS Servers

HydroServers













WaterML

NetCDF

One Common Ontology

CUAHSI

Ontology

Precipitation

Precipitation

Streamflow

Turbidity

Snow

Cloud Cover

Precip

Rainfall

Rain

Total
Precip

Precip

Rainfall

Rain

Total
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

Intelligent

Web 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


W
atershed


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

Questions?

WWO


Contact:

Fernando Salas (
salas@mail.utexas.edu
) or David
Maidment

(
maidment@mail.utexas.edu
)