Hydrologic applications using geospatial standards
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Hydrologic applications using geospatial standards. David Maidment, University of Texas and Ilya Zaslavsky, San Diego Supercomputer Center. Paper presented at European Geophysical Union, Vienna, 2009 EGU 2009 Splinter Session SMP 23, Wednesday April 22.

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Hydrologic applications using geospatial standards

Hydrologic applications using geospatial standards

David Maidment, University of Texas and Ilya Zaslavsky, San Diego Supercomputer Center

Paper presented at European Geophysical Union, Vienna, 2009

EGU 2009 Splinter Session SMP 23, Wednesday April 22


Hydrologic applications using geospatial standards1

Hydrologic applications using geospatial standards

  • Time series of water observations at points (WaterML and WFS)

  • Geospatial representation of water features (Arc Hydro as WFS)

  • Evolution of WaterML towards OGC standards


Hydrologic applications using geospatial standards2

Hydrologic applications using geospatial standards

  • Time series of water observations at points (WaterML and WFS)

  • Geospatial representation of water features (Arc Hydro as WFS)

  • Evolution of WaterML towards OGC standards


Web services in space and time

Web Services in Space and Time

  • Water Markup Language (WaterML) is a schema for encoding water observations time series data and metadata;

  • Geographic Markup Language (GML) encodes spatial data about sets of geographic features;

  • Sensor Web Enablement (SWE) specifies encoding and management of observations made at geographic features;

  • Combine these specifications so that you can transmit water data in space and time


Point water observations time series waterml

Point Water Observations Time Series (WaterML)

A point location in space

A series of values in time


Crwr web services library

CRWR Web Services Library


Hydrologic applications using geospatial standards

WaterMLData Services


Metadata web feature services

Metadata Web Feature Services


Wfs and waterml

WFS and WaterML

Observations Metadata in Space in GML

as a Web Feature Service

Observations Data in

Time in WaterML


Hydrologic applications using geospatial standards

A Theme Layer

Synthesis over all data sources of observations of a particular variable e.g. Salinity


Hydrologic applications using geospatial standards3

Hydrologic applications using geospatial standards

  • Time series of water observations at points (WaterML and WFS)

  • Geospatial representation of water features (Arc Hydro as WFS)

  • Evolution of WaterML towards OGC standards


Esri hydrology base map

ESRI Hydrology Base Map

A multiscale tile image base map customized for hydrology

http://resources.esri.com/arcgisdesktop/index.cfm?fa=content&tab=US_Maps


Hydrologic applications using geospatial standards

Observations Data Layer for Dissolved Oxygen in Corpus Christi Bay

http://129.116.104.172/ArcGIS/services/CCBAY_MySelect/GeoDataServer/WFSServer

displayed over the US Hydrology Base Map from

http://downloads2.esri.com/resources/arcgisdesktop/maps/us_hydrology.mxd

WSDL address and parameters to obtain observations data using GetValues

Metadata for selected data series at observation point H1


Hydrologic applications using geospatial standards

Arc Hydro Groundwater Data for TWDB wells in Lubbock County

http://129.116.104.172/ArcGIS/services/Lubbuck_Wells/GeoDataServer/WFSServer

displayed over the US Hydrology Base Map from

http://downloads2.esri.com/resources/arcgisdesktop/maps/us_hydrology.mxd

Piezometric head time series at TWDB State well 2309901


Hydrologic applications using geospatial standards

Arc Hydro Groundwater Data for the Edwards Aquifer

http://129.116.104.172/ArcGIS/services/EdwardsWFS/geodataserver/WFSServer

displayed over the US Hydrology Base Map from

http://downloads2.esri.com/resources/arcgisdesktop/maps/us_hydrology.mxd

Web feature service for aquifers and wells


Hydrologic applications using geospatial standards

Gam ModFlow Data acquired from a Web Feature Servicehttp://129.116.104.172/ArcGIS/services/Gam_modflow/GeoDataServer/WFSServer

A regional groundwater model of the Gulf Coast Aquifer published as a web feature service from Arc Hydro Groundwater


Hydrologic applications using geospatial standards4

Hydrologic applications using geospatial standards

  • Time series of water observations at points (WaterML and WFS)

  • Geospatial representation of water features (Arc Hydro as WFS)

  • Evolution of WaterML towards OGC standards


Hydrologic applications using geospatial standards

Hydrologic Information System Service Oriented Architecture

Test bed HIS

Servers

HIS Lite

Servers

Central HIS servers

External data providers

Global search (Hydroseek)

Deployment to test beds

Customizable web interface (DASH)

Other popular online clients

HTML - XML

Desktop clients

Data publishing

HIS CentralRegistry & Harvester

Water Data Web Services, WaterML

WSDL - SOAP

Ontology

ETL services

Controlled vocabularies

Metadatacatalogs

ArcGIS

WSDL and ODM registration

Matlab

IDL, R

Ontology tagging (Hydrotagger)

Excel

ODM DataLoader

Programming (C#, VB..)

Streaming Data Loading

MapWindow

ODMTools

HISDesktop

Modeling (OpenMI)

Server config tools


Water data services

Water Data Services

  • Set of query functions

  • Returns data in WaterML

NWIS Daily Values (discharge), NWIS Ground Water, NWIS Unit Values (real time), NWIS Instantaneous Irregular Data, EPA STORET, NCDC ASOS, DAYMET, MODIS, NAM12K, USGS SNOTEL, ODM (multiple sites)


Synthesis and communication of the nation s water data http his cuahsi org

Synthesis and communication of the nation’s water data http://his.cuahsi.org

Government Water Data

Academic Water Data

National Water Metadata Catalog

Hydroseek

WaterML


Waterml components

WaterML Components


Waterml evolution

WaterML 1.0: OGC Discussion Paper, 2007

WaterML 1.1: mid-2008

To reflect changes in ODM 1.1 (expose additional fields)

To remove enumerations used to implement controlled vocabularies (e.g. for ValueType, DataType, GeneralCategory)

Consistency (e.g. remove reliance on IDs; units

WaterML 2.0: harmonizing WaterML 1.1 with O&M, to be accessed via SOS and/or WFS

WaterML Evolution


Water services planning

Water Services: planning

WaterML 1.0/1.1

WaterML 2

WDTF

Defined Messages

WaterWebServices

OpenGIS(WFS, SOS)

Web Service Interface Defintions used in Services API

Data Abstraction Layer using an

Object Relational Model

Entity model manages data access

ODM1.1

(MS SQL)

ODM1.1

(Postgres)

Custom

DataSource

Custom Code

(populates model)

Other

Data Source

Standard DB Schemas

ODM1.1

(MySQL)


Conclusions

Conclusions

  • Web Feature Services are like zemmels – you just have to have them!

  • WaterML 1 has become a standard language for water observations time series but its not fully OGC compliant

  • WaterML 2 will be developed by a joint OGC/WMO working group

    • What mechanism should be used to support this effort?


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