Data Stewardship and Maintenance for the National Hydrography Dataset

1
Data Stewardship and Maintenance for the
National Hydrography Dataset
Gladys Conaway USGS National Geospatial Technical
Operations Center III
2
National Hydrography Dataset

• Nationally integrated, seamless, dataset of
  surface water features.
• Network
• Classification
• Names
• Inventory (National Identifier) REACH Code
• Lineage
• The NHD is the hydrography layer of the National
  Map

3
Current NHD Status

• Medium Res. available Nationwide (1100K-Scale)
• High Res. available for 80 of Nation
  (124K-Scale 163K-Scale AK )
• Partners EPA, USFS, NPS, and States.
• National coverage to be completed in 2006
• Local Res. available for Vermont (gt124K-Scale)
• North Carolina local res. from LIDAR
• West Virginia 14800 hydro source

4
(No Transcript)
5
(No Transcript)
6
Phases of the NHD

• Initial Collection
• Based on available sources
• Refinement
• Based on completing the Network
• Maintaining Currency
• Updating - Based on local knowledge
• Revision

7
NHD Maintenance

• Goal keep NHD data synchronized with national
  holdings
• Managed as National Repository in GeoDatabase
• Feature based transactional updates
• Looking for partners, data stewards
• Examples Minnesota, Pennsylvania, New York
• Develop and use common tools
• Training kits and user documentation

8
NHD Updates

• Geometry
• Content
• Revision
• Flow
• Flow Direction
• Adding Connectors
• Attributes
• GNIS Name

9
Maintenance and Stewardship

• Maintenance Documentation available
• Maintenance Tools available
• Maintenance USGS Support

• Stewardship Memorandum of Understanding (MOU)
• Proposed Stewardship models
• USGS Leadership

10
NHD Maintenance Tools

• NHDnGEO Table Edit
• Editing Tool in ArcGIS editing environment
• NHDnGeo Edit Tools
• Tool limited to updates only
• Available for release in mid 2006

11
NHD Maintenance Support

• Training
• Tools and procedures
• Partnership Development
• Workshops / Seminars
• User applications
• Technology Transfer
• Software and Design

12
Stewardship

• Distributed Maintenance
• Typically on a State-by-State basis
• Suited to regional needs
• Roles defined in Memorandum of Understanding
  (MOU)

13
NHD Stewardship Models

• Model 1 Administrative Steward
• Model 2 Data Steward
• Model 3 Data Steward Serving Data
• Model 4 Multiple Stewards

14
Administrative Steward
National Map
NHD GeoDataBase
12
12
Approved list of Maintainers
NHD Data Users
Coordination of Data Maintainers
Administrative Steward (Adjudicator) Ex State
Agency
15
National Map
Data Steward
NHD GeoDatabase
1
USGS Data Distribution
Updates to USGS
NHD Data Users
4
23
23
23
23
5
Validated Updates with National Identifiers
FS NHD GeoDatabase
16
National Map
Data Steward Serving NHD data
NHD GeoDatabase
1
USGS Data Distribution
Updates to USGS
NHD Data Users
4
23
23
23
23
5
Validated Updates with National Identifiers
17
National Map
Multiple Stewards
NHD GeoDatabase
Updates to USGS
Updates to USGS
1
1
4a
4
USGS Data Distribution
Validated Updates with National Identifiers
Validated Updates with National Identifiers
5
5
4b
NHD Data Users
18
Stewardship and Maintenance USGS NGTOC

• Stewardship And Maintenance (SAM)
• User Support
• GeoDatabase Support
• NHD Technical Support (nhd_at_usgs.gov)
• Stewardship Promotion and Development
• Maintenance Tool Training / Support

19

• http//nhd.usgs.gov/