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WV Spatial Data Infrastructure

WV Spatial Data Infrastructure. Kurt Donaldson Craig Neidig. WV Spatial Data Infrastructure. WV Core Layers: Orthoimagery Hydrography Transportation Elevation Boundaries (Governmental Units) Land Ownership (Cadastral) Structures Geographic Names Geodetic Control.

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WV Spatial Data Infrastructure

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  1. WV Spatial Data Infrastructure Kurt Donaldson Craig Neidig

  2. WV Spatial Data Infrastructure WV Core Layers: Orthoimagery Hydrography Transportation Elevation Boundaries (Governmental Units) Land Ownership (Cadastral) Structures Geographic Names Geodetic Control

  3. Build Once, Use Many Times

  4. Why build “Framework” base layers? • Commonly used base spatial data – almost always need it to make a map • High resolution spatial and temporal accuracies • Spatial databases complete in geometry and attribution • Standards-based, well-documented • Enhanced functionality (i.e., NHD stream flow, linear referencing) • Seamless across political or other collection area boundaries • Reduces costly data duplication efforts • Facilitates data exchange (i.e., NHD to TIGER/Line) • Certified, consistent base layers for The National Map

  5. Trends for Statewide Core Data Sets Geospatial Trends for Statewide Core Data Sets 1:100,000 Scale 1980’S 1:24,000 Scale 1990’s-present 1:4800 Scale Future

  6. Orthoimagery • Present • 1996-1999 USGS Color-Infrared Digital Orthophoto Quads • 1:12,000 scale (1” = 1000 ft.) • 1 meter GSD • 1822 USGS 3.75-Minute quarter quads • Valued at 2 million • Future • 2003 Statewide Addressing and Mapping Board (SAMB) Natural Color Orthophotos • 1:4800 scale (1” = 400 ft.) • 2 foot GSD • 8,000 image files – 10,000’ x 10,000’ Tiles • 4.72 million; USDA cost share $375,000 • Challenges • Large file size and quantity of SAMB imagery • Update cycles for new imagery

  7. Orthoimagery Present Future CIR AERIAL PHOTOS Scale: 1:12,000 1” = 1,000 ft. Date: 1996-97 AERIAL PHOTOS Scale: 1:4800 1” = 400 ft. Date: Spring 2003

  8. Hydrography • Present • 1:24,000-scale National Hydrography Dataset (NHD) • 1:24,000-scale sub watershed boundaries (6th level, 12-digit HUCs) • Future • Convert SAMB hydography to 1:4800-scale NHD • SAMB data: minimum attribution • Challenges • Funding, needs analysis, cost-effectiveness of conversion

  9. Hydrography (1:24,000)

  10. 6th Level (12 Digit) Subwatersheds

  11. Transportation • Present • 1:24,000-scale Topographic Map-Based vectors (minimal attribution) • 1:62,500-scale WV DOT (cartographic generalizations) • 1:100,00-scale Census TIGER files (poor spatial resolution) • Future • 1:4800-scale SAMB addressable road centerlines • Census MAF/TIGER Modernization • Re-alignment of Census TIGER data to SAMB road centerlines • SAMB data meets minimum requirement of 7.6 meters accuracy • Challenges • Long-term maintenance of statewide, addressable road centerline data set • Integration with SAMB long-term maintenance program • Integrating statewide road centerline data set with locally produced edge of pavement (double line) roads

  12. Transportation (1:24,000)

  13. State DOT GIS Implementation 2004 AASHTO GIS-T Symposium

  14. Elevation • Present • 1:24,000-scale Digital Line Graphy (vector) Hypsography (77%) • 30-meter DEMs (100%) • 10-meter DEMs (36%) • Future • High-Resolution Elevation Products (5 meter or better DEM grids) • WVSAMB “enhanced” digital terrain model • WV DOT $850,000 cost share for Microstation files • USGS Pilot to convert SAMB to gridded raster • IFSAR digital terrain model • LIDAR • Challenges • Vertical accuracies not guaranteed in dense vegetation • Best product for the National Elevation Dataset (NED)

  15. Elevation (1:24,000)

  16. IFSAR (2003)

  17. DATASET NAME OWNER(S) Horiz. Accuracy Vertical RMSE and Contour Interval MAPPING SYSTEM UNIT % WV DATE National Elevation Dataset (Level 1 & 2 DEMs) USGS 30 meter 10 to 50 ft. RMSE 20 or 40 ft. C.I. Seamless Nation-wide 100 2000 Digital Line Graph (DLG) Contours and Spot Elevations USGS 1:24,000-scale 10 to 20 ft. RMSE 20 or 40 ft. C.I. 7.5 Min. Quad 77 1950-1997 10-meter DEMs (USGS) USGS 10 m 10 to 20 ft. RMSE 7.5 Min. Quad 36 Varies Enhanced DTM (mass points & break lines) WVSAMB 5 ft. RMSE 10 ft. C.I. 10,000 ft. x 10,000 ft. tiles 100 2003 IFSAR DTM (5 meter postings)  Intermap 2.0 m 3 ft. (1st Surface) 10 ft. C.I. 40,000 square km 40 2003  LIDAR FEMA 0.5 m 0.5 ft. RMSE < 2 ft. C.I. Study Area 2 Varies Elevation 1.25 m

  18. Boundaries (Governmental Units) • Present • Various types of political and administrative boundaries compiled at various scales: County and Municipal Boundaries; Census Geographic Entity Boundaries; Public Land Boundaries; Tax District Boundaries; Emergency Service Zone Boundaries; Legislative Boundaries • Future • Improved Coordination: • WV Association of Land Surveyors for GIS-compatible surveys • WV Legislative Redistricting Office for District Boundaries • Census Submission of Digital Annexation & Boundary Surveys • Improve Boundaries with SAMB data • Challenges • Certified, consistent boundaries the same for all levels of government • Shared geographic boundaries properly aligned (i.e., WMAs with NF)

  19. Boundaries (1:24,000-scale)

  20. Boundary Comparison (24k versus 500k)

  21. Land Ownership (Cadastral) • Present • 42 of 55 counties (76 %) are using, or transitioning to, GIS-based tax mapping programs • Future • Link SAMB addressable mapping files (i.e., structures) with cadastral • Challenges • Local assessors establishing GIS-based mapping programs • Linking geographic files to State’s Integrated Assessment System (IAS) • Capitalize on Mineral Parcel Mapping Project • Statewide repository of tax parcel files

  22. WV Digital Tax Mapping Status

  23. Mineral Parcel Mapping Project - WVDTR

  24. Mineral Parcel Mapping Project • Can be a starting point for digital tax map conversions • Not all surface parcel related features collected • Not continually updated WV DTR Collection State Mapping Project Local Tax Map

  25. Geographic Names • Present • Geographic Names Information System (GNIS) • Updates by West Virginia through web data entry and edit forms • Future (maintenance activities) • Target GNIS feature classes with high error rate for batch processing • Wildlife Management Areas (WV DNR) • Schools (WV Army National Guard) • Update GNIS manmade features with SAMB addressable mapping layers • Schools, Churches, Hospitals, Bridge, Building, Airport) • Incorporate subtypes (Schools – public, private, college, vocational) • Challenges • Reconciling previous with more current name databases

  26. Structures • Present • Limited • Future • SAMB addressable structures (approximately 800,000) • building centroids • footprint polygons of major structures (> 7500 square feet) • Challenges • Maintenance of statewide structure database • Integration of structure spatial database with other data models

  27. SAMB Structures – Centroids and Footprints

  28. Geodetic Control (Transparent Layer) • Present • WV High Accuracy Reference Network (HARN) established in 2000 • New ground control established through SAMB • Future • Additional CORS survey grade base stations • Densify Federal Base Network • Challenges • Establishing protocols for exchanging geographic information between surveyors and GIS professionals

  29. The National Map 21st Century Topographic Map A seamless, continuously maintained, and consistent set of online, public domain, core geographic data • Cartographic Product • High quality, visually appealing printed product • State Portal to National National – WVmap State Portal • Public access to data via USGS, state, or other portals • WVmap portal customized to West Virginia’s needs • Seamless download • Projection and GIS format translators • Search and map display functions • Search by place name, address, coordinate) • Print-on-demand maps • Challenges • Establishing protocols for exchanging geographic information between surveyors and GIS professionals

  30. Printed Cartographic Product Morgantown South, WV pilot map

  31. National Map Viewer

  32. State Map Viewer

  33. Wvmap – Customized to WV’s Needs Customized Javascript function for ArcIMS

  34. Viewer Partnerships • FEDERAL • National Elevation Dataset (USGS) • National Hydrography Dataset (USGS) • Geographic Names (USGS) • Flood Hazard Areas (FEMA) • SAMB Orthophotos (USDA) • National Forest Lands (USFS) • National Park Lands (NPS) • STATE • State Forests / Wildlife Management Areas (WV DNR) • Critical Infrastructure (WV OES) • Water Intakes ( WV BPH) • Mining Data (WV DEP) • Geology (WV GES) • Coal Impoundments (WV CS, CET) • Land Cover (WVU NRAC) • PRIVATE SECTOR • New Roads (Baker Engineering)

  35. AGENCY ROLL CALL • Present and future mapping activities • Final Report – August 1st • 62 agencies submitted

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