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

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

Current NHD Status n Medium Res. available Nationwide (1:100K-Scale) n High Res. available for 80% of Nation (1:24K-Scale + 1:63K-Scale AK ) t Partners: EPA, USFS, NPS, and States. t National coverage to be completed in 2006 n Local Res. available for Vermont (>1:24K-Scale) t North Carolina – local res. from LIDAR t West Virginia – 1:4800 hydro source

Phases of the NHD n Initial Collection t Based on available sources n Refinement t Based on completing the Network n Maintaining Currency t Updating - Based on local knowledge t Revision

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

NHD Updates t Geometry u Content u Revision t Flow u Flow Direction u Adding Connectors t Attributes u GNIS Name

Maintenance and Stewardship n Maintenance Documentation available n Maintenance Tools available n Maintenance USGS Support n Stewardship Memorandum of Understanding (MOU) n Proposed Stewardship models n USGS Leadership

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

NHD Maintenance Support n Training t Tools and procedures t Partnership Development n Workshops / Seminars t User applications n Technology Transfer t Software and Design

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

NHD Stewardship Models n Model 1 – Administrative Steward n Model 2 – Data Steward n Model 3 – Data Steward Serving Data n Model 4 – Multiple Stewards

Administrative Steward (Adjudicator) Ex: State Agency Tech. Steward A NHD Update Tech. Steward B NHD Update Approved list of Maintainers 1+2 Administrative Steward NHD GeoDataBase NHD Data Users Data Exchange Administrative Exchange Coordination of Data Maintainers National Map

NHD GeoDatabase 2+3 Data Steward 2+3 USGS Data Distribution Updates to USGS 1 Forest A NHD Update Forest B NHD Update 4 Validated Updates with National Identifiers NHD Steward Ex: Forest Service FS NHD GeoDatabase NHD Data Users Data Exchange National Map

Data Steward – Serving NHD data NHD GeoDatabase 2+3 Tech. Steward A NHD Update Tech. Steward B NHD Update NHD Steward Ex: State State NHD GeoDatabase NHD Data Users Data Exchange 2+3 USGS Data Distribution Updates to USGS National Map Validated Updates with National Identifiers

Multiple Stewards NHD Data Users Data Exchange Tech. Steward Forest A NHD Update Tech. Steward Forest B NHD Update NHD Steward Ex: Forest Service FS NHD GeoDatabase 2+3 USGS Data Distribution Updates to USGS 1 Tech. Steward A NHD Update Tech. Steward B NHD Update NHD Steward Ex: State State NHD GeoDatabase 2+3 4a 1 55 Updates to USGS 4 National Map NHD GeoDatabase 4b Validated Updates with National Identifiers Validated Updates with National Identifiers

Stewardship and Maintenance USGS NGTOC n Stewardship And Maintenance (SAM) t User Support u GeoDatabase Support u NHD Technical Support t Stewardship Promotion and Development t Maintenance Tool Training / Support