WQX and NHD+V2

WQX and NHD+V2

ABE 527January 2013•Larry Theller

Database: WQX

• What is WQX• How is it used• Original concept for data upload• Current “state of the art” data loader• Process flow• Data loader upgrades created for this project• Future Tool (2 year NEIEN project)

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Physical Features :NHD+ V2

• What is NHD+ V2• How is it used• Original concept for data upload• Current “state of the art” data loader• Process flow• Data loader upgrades created for this project

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4NHD: Network and Behaviors

Data flow as Services

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Key Web Links• http://viewer.nationalmap.gov/viewer/ national map viewer Get

NHD/DEM/WBD• http://watersgeo.epa.gov/mwm/ EPA MyWaters viewer• http://www.epa.gov/storet/ STORET text query• http://www.epa.gov/storet/dbtop.html real door to database• http://www.waterqualitydata.us/portal.jsp National Water Quality

Monitoring Council• http://www.horizon-systems.com/NHDPlus/NHDPlusV2_home.php NHD+

Version 2• http://www.epa.gov/waters/geoservices/index.html EPA Waters Services• http://www.epa.gov/enviro/html/frs_demo/geospatial_data/

geo_data_regions.html EPA KML Data

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WQX as Framework

• The Water Quality Exchange (WQX) is a framework that makes it easier for States, Tribes, and others to submit and share water quality monitoring data over the Internet.

• States, Tribes and other organizations can now submit data directly to the publicly-accessible STORET Data Warehouse using the WQX framework.

• WQX will eventually replace the distributed STORET, the STORET Data Entry Module, Reports Module, and STORET Import Module or SIM as the primary means of submitting water quality monitoring data to EPA.

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9http://www.epa.gov/storet/wqx/products/WQX_factsheet.pdf

CDX

STORETNODE

WEB

10http://www.epa.gov/storet/wqx/products/WQX_factsheet.pdf

Project Name

Monitoring Locations

2010 Activity - Results


Database Schema


Sample XML for monitoring location upload.

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• The National Hydrography Dataset (NHD) is the surface water component of The National Map.

• Contains features such as lakes, ponds, streams, rivers, canals, dams and streamgages.

• GIS technologies take advantage of a rich set of attributes imbedded in the NHD to generate specialized information.

• These analyses are possible because the NHD contains a flow network that allows for tracing water downstream or upstream.

• It also uses an addressing system based on reach codes and linear referencing to link specific information about the water such as water discharge rates, water quality, and fish population.

• Using basic NHD features like flow network, linked information, and other characteristics.

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Hydrography Event Management ToolThe Hydrography Event Management (HEM) Tool provides full functionality for adding and editing events in the NHD.

Events are informational data that are linked to the NHD using a linear referencing system on NHDFlowlines. The use of events is a key characteristic of the NHD by allowing vast amounts of scientific information to be linked to the NHD while keeping the design simple and by making advanced analysis techniques possible.

The HEM tool handles all the linear referencing mechanics to make working with events easy. A Source Feature ID is created that provides the link between the event location and the informational data tied to the location. It also creates metadata linked to the event. The tool also provides network measuring to determine distances through the flowline network.

Developer: Department of the Interior - Bureau of Land Management

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NHD+ V2• Greatly improved 1:100K National Hydrography Dataset (NHD) • Greatly improved 30 meter National Elevation Dataset (NED)• Nationally complete Watershed Boundary Dataset (WBD)• A set of value added attributes to enhance stream network

navigation, analysis and display • An elevation-based catchment for each flowline in the stream

network • Catchment characteristics and cumulative drainage area

characteristics • Flow direction, flow accumulation and elevation grids • Flowline min/max elevations and slopes • Flow volume & velocity estimates for each flowline in the stream

network • Catchment attributes and network accumulated attributes• Various grids from the hydro-enforcement process including the

hydro-enforced DEM.16

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Select Dams, by point or by

Reach CODE and you can

select downstream water

features.

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EPA WATERS Services

www.epa.gov/waterswww.epa.gov/waters

Available WATERS Data

• National Hydrography Dataset (NHD)• NHDPlus Catchments • Watershed Boundary Dataset (WBD)• Water Program Features indexed to the NHD:

– Assessed Waters– Impaired Waters– Beaches– Combined Sewer Overflows– Clean Watersheds Needs Survey– Fish Consumption Advisories

– Clean Water State Revolving Fund Projects

– No Discharge Zones– Permitted Dischargers– Total Maximum Daily Loads– Water Quality Standards

Additional Information: http://www.epa.gov/waters/data/prog.html

http://www.epa.gov/waters/doc/auxiliary/index.html

http://www.epa.gov/waters/data/prog.html

http://www.epa.gov/waters/doc/auxiliary/index.html

WATERS Data Web Pages• Contains detailed

information about the Reach Address Database, NHD, NHDPlus, and other supplemental tables.

WATERS Data Web Pages• Web page contains

hyperlinks to Auxiliary Dataset information.

– Watershed Boundary Dataset

– Tiger 2008 (subset)

– NHDPlus Smoothed

– Regional layers

– National Atlas (subset)

Available WATERS Services

• Web and Database Services

– Validate and Convert Lat/Long Service

– Get Entities by Lat/Long, HUC, and Radius Service

– Get Program Waters Entities

– NHD Event Indexing Service *

– NHD Point Indexing Service *

– Identify Service

– Total Waters by State, HUC, FCODE, and Bounding Box

– Name Service

– Upstream/Downstream Service

– Navigation Service *

* Currently database only service

Additional Information: http://www.epa.gov/waters/geoservices/index.html

http://www.epa.gov/waters/geoservices/index.html

WATERS Services Web Page• Services web page

contains high-level overview information about available services.

• Indicates if service is available as web and/or database service.

• Provides link to SOAP Service Endpoint and WSDL.

• Provides information about underlying database location and name.

WATERS Services Web Page• Services web pages

contain detailed level information about individual services.

– Description of the service

– Input parameters

– Example call to the database service

– Sample SOAP Request

– UML object diagram

– Output object

– Sample SOAP Response








– Output object









– Output object









– Output object


What it means to users• Users can develop light

weight mapping clients that easily consume OW services.

• The example screenshot shows a light weight client making a call to the OW Navigation Service requesting navigation results 25 miles upstream of a point location.



• The example screenshot shows a light weight client making a call to the NHD Point Indexing Service.

• 1) Shows the results of a snap operation.

• 2) Shows the results of a raindrop operation.



• The example screenshot shows a light weight client making a call to a prototype basin delineation service that dissolves smoothed catchments into a resulting basin of interest.

What it means to users• Users can display web

service results using customizable style sheets.

Demonstration

• Access to framework geospatial datasets stored in the WATERS Database and to general purpose interactive service panels.

• Dialog boxes providing access to tools, services, and information, such as NHD feature name query, total waters, up/downstream navigation, watershed reports, ATTAINS reports, etc.

• Access to indexed water program features, with hyperlinks to additional attributes, and context sensitive analysis services, such as up/downstream navigation and watershed reports.

http://watersgeo.epa.gov/mwm/ EPA MyWaters viewer

The End

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Documents

WQX and NHD+V2