spatial water data subcommitte update to the fgdc cag bob pierce, doi tod dabolt, epa
TRANSCRIPT
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Spatial Water Data Subcommitte Update to the
FGDC CAG
Bob Pierce, DOI
Tod Dabolt, EPA
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Vision for aNational Geospatial Surfacewater
Framework - Mission Accomplished?
NED
NHD
WBD
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National Hydrography DatasetNational Hydrography Dataset• Seamless National Coverage
• Managed by Hydrologic Units
• National Consistency • Uniform Characteristics
• Advanced Geospatial Model• Relational/Feature Based
• Living Database• Designed for Updates Through Data Stewardship
• Analytical Capabilities• Flow Network/Linear Referencing
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Example of National Hydrography DatasetExample of National Hydrography Dataset
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Medium Resolution NHDMedium Resolution NHD
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High Resolution NHDHigh Resolution NHD
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Local Resolution NHDLocal Resolution NHD
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Integration of NHD and WBDIntegration of NHD and WBD
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• An integrated suite of application-ready geospatial data sets that incorporate many of the best features of the– National Hydrography Dataset (NHD) – National Elevation Dataset (NED)– Watershed Boundary Dataset (WBD)
• NHDPlus includes -– improved NHD names and networking, – value-added attributes (such as stream order) that enable
advanced query, analysis and display, – elevation-derived catchments that integrate the land surface with
the network, – catchment attributes (such as temperature, precipitation, land
cover), – stream flow volume and velocity estimates for pollutant dilution
modeling, and – associated flow direction and accumulation grids.
• An integrated suite of application-ready geospatial data sets that incorporate many of the best features of the– National Hydrography Dataset (NHD) – National Elevation Dataset (NED)– Watershed Boundary Dataset (WBD)
• NHDPlus includes -– improved NHD names and networking, – value-added attributes (such as stream order) that enable
advanced query, analysis and display, – elevation-derived catchments that integrate the land surface with
the network, – catchment attributes (such as temperature, precipitation, land
cover), – stream flow volume and velocity estimates for pollutant dilution
modeling, and – associated flow direction and accumulation grids.
What is NHDPlus?What is NHDPlus?
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The inset map shows the watershed (white boundary) defining the drainage area upstream from the mouth of Four Mile Run (red dot) and a report of associated watershed characteristics – both produced using NHDPlus.
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National Hydrography DatasetNational Hydrography Dataset• The Hydrography component of
The National Map
• Surface Water of the United States
• 1:100,000-scale content - 2001
• 1:24,000-scale content - 2007
• 1:4,800-scale content - ongoing
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National Hydrography DatasetNational Hydrography Dataset• The Hydrography component of
The National Map
• Surface Water of the United States
• 1:100,000-scale content - 2001
• 1:24,000-scale content - 2007
• 1:4,800-scale content - ongoing
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Combination of U.S. – Canada HydrographySt. Croix Subbasin, Maine-New Brunswick
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USGS ALABAMA
KANSAS
MAINE
COLORADO
ARKANSAS
CALIFORNIA NEW YORK
UTAH
U.S.FORESTSERVICE
BureauLand
Management
CITY OF NEW YORK
STATEENGINEER’S
OFFICE
DEPARTMENTENVIRONMENTAL
QUALITY
SAN FRANCISCOBAY ESTUARY
INSITUTE
Stewardship ModelStewardship Model
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The Watershed Boundary DatasetDrainage to a point
Drainage boundaries for all surface areas
Impartial to boundaries, projects, programs, or agencies
Meets the National Standards for Spatial Data Accuracy (NSSDA)
Uses DOQQ’s or higher resolution imagery, contours of elevation, stream locations and other data to improve accuracy or currency
And carries a suite of useful attribution
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Next year we will have a combined WBD and NHD
A new way of thinking about Hydrography
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Watershed Boundary Dataset integration with the National
Hydrography Dataset
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Benefits of a joint WBD/NHDNHD and the WBD naturally complement each other
Both are used extensively in hydrology, biology, resource management, and pollution control
Improves interoperability of the two datasets, and for users
A single hydrography geodatabase facilitates all aspects of joint stewardship of the two feature databases-NHD and WBD
Joint data distribution servicesJoint stewardship operationsJoint program managementCombined operations to the extent possible
Many positive outcomes to have WBD become part of The National Map (TNM)
NHD GeoEdit tool could accommodate WBD edits and provide feature level metadata tracking
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StewardshipStewardship is a partnership between local, state and federal entities to ensure that WBD and NHD data is current, available, and relevant.
NATIONAL RESPONSIBILITIES:Provide program leadership and managementWork with state stewards to ensure success of WBD/NHD stewardship objectivesEnsure “certification” integrity is maintained in WBDAssist with technical issuesSupport successful integration of NHD and WBD stewardship
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International Border Harmonization
U.S./Mexico
U.S./Canada
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Washington coast after the 3-nm NOAA marine boundary was applied for the outer limit of the HU. No nearshore limit was applied
WBD Coastal Modifications
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Integration with Geographic Names Information System (GNIS) Integration
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