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					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
Build Once, Use Many Times
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
Geospatial Trends for Statewide Core
Trends for Statewide Core Data Sets Data Sets


  1:100,000 Scale
      1980’S




                    1:24,000 Scale
                      1990’s-present




                                       1:4800 Scale
                                           Future
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
Orthoimagery
         Present                      Future




     CIR AERIAL PHOTOS       AERIAL PHOTOS

     Scale: 1:12,000         Scale: 1:4800
            1” = 1,000 ft.          1” = 400 ft.

     Date: 1996-97           Date: Spring 2003
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
Hydrography (1:24,000)
6th Level (12 Digit) Subwatersheds
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
Transportation (1:24,000)
State DOT GIS Implementation
            2004 AASHTO GIS-T Symposium
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)
Elevation (1:24,000)
IFSAR (2003)
Elevation
  DATASET NAME         OWNER(S)   Horiz.      Vertical RMSE and     MAPPING        %      DATE
                                  Accuracy     Contour Interval     SYSTEM         WV
                                                                     UNIT


National Elevation     USGS       30 meter    10 to 50 ft. RMSE     Seamless       100     2000
Dataset (Level 1 & 2                          20 or 40 ft. C.I.     Nation-
DEMs)                                                               wide


Digital Line Graph     USGS       1:24,000-   10 to 20 ft. RMSE     7.5 Min.       77    1950-1997
(DLG) Contours and                  scale     20 or 40 ft. C.I.     Quad
Spot Elevations


10-meter DEMs          USGS         10 m      10 to 20 ft. RMSE     7.5 Min.       36     Varies
(USGS)                                                              Quad


Enhanced DTM           WVSAMB       1.25 m         5 ft. RMSE       10,000 ft. x   100     2003
(mass points & break                                10 ft. C.I.      10,000 ft.
lines)                                                                 tiles
IFSAR DTM              Intermap     2.0 m     3 ft. (1st Surface)   40,000         40      2003
(5 meter postings)                            10 ft. C.I.           square km


LIDAR                  FEMA         0.5 m     0.5 ft. RMSE          Study Area      2     Varies
                                              < 2 ft. C.I.
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)
Boundaries (1:24,000-scale)
Boundary Comparison (24k versus 500k)
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
WV Digital Tax Mapping Status
Mineral Parcel Mapping Project - WVDTR
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
         Local Tax Map                                State Mapping Project
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
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
SAMB Structures – Centroids and Footprints
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
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
Printed Cartographic Product




         Morgantown South, WV pilot map
National Map Viewer
State Map Viewer
Wvmap – Customized to WV’s Needs




    Customized Javascript function for ArcIMS
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)
AGENCY ROLL CALL
• Present and future mapping activities
• Final Report – August 1st
• 62 agencies submitted

				
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posted:2/21/2012
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