WV%20Statewide%20Coverage

1

• WV Statewide Coverage
• of
• 1/9 Arc-Second
• USGS National Elevation Dataset
• Merging the highest-resolution, best quality
  elevation data available
• across the United States into a seamless raster
  format

Kevin Kuhn, Kurt Donaldson WV GIS Technical
Center West Virginia University
WV GIS Coordinators Office WV Office of State
GIS Coordinator WV Geological Economic Survey
2
Elevation Conversion Project

• Input Data Photogrammetric-derived mass points
  and break lines
• Output Data Hydrologically enhanced,
  high-resolution grid incorporated into National
  Elevation Dataset (1/9th arc second / 3-meter
  resolution )

Elevation Mass Points and Breaklines
3-meter DEM
3
Private Sector Partners
Verizon Funded mapping
BAE Systems Mapping Contractor (Bob Hickey,
Clark Selby, Sandy Howery)
Baker Project Manager (Joe Seppi)
4
Public Sector Partners
USGS Funding, technical expertise, steward and
distributor of USGS National Elevation
Dataset (Bruce Bauch and Steve Rich)
Statewide Addressing and Mapping Board Source
data and support (Craig Neidig)
WV Dept. of Transportation Funded enhanced
elevation
WV GIS Technical Center Contractor for raster
conversion and distributor of USGS National
Elevation Dataset
5
Project Highlights

• COLLECTION DATE Spring 2003
• DATA SOURCE Statewide Addressing and Mapping
  Board
• ACCURACY Supports nominal vertical accuracy /-
  10 feet
• NATIONAL PRODUCT STANDARD National Elevation
  Dataset
• DATA DISTRIBUTION National and State Data
  Clearinghouses
• FILE SIZE ( 7.5-Minute Quad) 105 MB
  uncompressed
• COMPLETION TIME Data Collected 3 years
  Raster Conversion 19 months
• PARTNERS 3 private sector, 4 public sector
• DATA VALUE 2 million dollars

6
Methodology

• Pre-Process Vector Source Files
• Elevation mass points and breaklines
• Hydrography drainage edits
• Create Terrain Surfaces
• Create TIN
• Convert to 3-meter Raster
• Drainage Enhancement
• Quality Control Checks

7
Processing Unit 7.5 USGS Quad

• AREA
• Ranked 41st in Nation
• Total 24,244 sq mi
• Width 130 miles (210 km)
• Length 240 miles (385 km)
• 495 USGS 7.5' Quads

8
Photogrammetric-Derived Mass Points and
Breaklines
NOT LIDAR!
9
Source Data Vector Format
Elevation Mass Points and Breaklines
Hydrography
10
Terrain Surface Models
Grid Surface
TIN Surface
11
Geoprocessing (Automated)

• Automation Program scripts automated all
  geoprocessing steps to convert elevation mass
  points and breaklines into terrain surfaces
• Program Languages Python, Arc AML, Arc
  Objects, Visual Basic, Microsoft .Net
• Geoprocessing StatisticsTotal files
  processed 45,761 Total computation time240
  hours (10 days)

GIS Programmer - Sam
12
Drainage Enhancement
13
Drainage Enhancement (Manual)

• GIS Technicians using Delta 3D (raster editing
  software) to perform drainage enhancement,
  edge-matching, and other quality control checks

14
30-Meter Digital Elevation Model
15
10-Meter Digital Elevation Model
16
3-Meter Digital Elevation Model High Resolution
17
USGS Elevation Status Graphic
18
Elevation Data Sets for West Virginia
5 m
19
Data Distribution Formats

• National Data Clearinghouse
• State Data Clearinghouse

20
USGS Seamless Data Distribution System
21
Resources
Fact Sheet
Technical Report http//www.wvgis.wvu.edu/
22
Applications

• Visual Impact
• Drainage
• Mine Fill
• Dam Safety
• Mitigation Planning
• Environmental
• Base Layers
• Flood Hazard

23
Visual Application TIN Perspective View
24
Visual Application Photorealistic Drape
25
Visual Application Photorealistic Drape
26
Visual Application New River Gorge Housing
Development
Location of proposed development, Fayette County,
WV
Source Michael Strager, WVU Natural Resource
Analysis Center
27
Example 1 View from across the gorge
View of New River Gorge, taken Fall 2005
28
Lines existing roads and trails
29
Proposed development, top of hill
30
Development, with houses added in Visual Nature
Studio
31
Visibility of houses with modeled tree cover,
Visual Nature Studio
32
Mining Application Mountaintop Mining and
Valley Fill
Slope Map (Valley Fill)
33
Mining Application Coal Refuse Fill Depth
Difference of historical and new elevation data
models. Identifies changes in surface topography
over time.
34
Drainage Application Watershed Delineation
35
Drainage Application Mine Drainage Changes
Source WV DEP
36
Drainage Application Dam Safety
Source WV DEP
Catchment areas and associated land cover for
dams in the South Branch of the Potomac Drainage.
Used to model runoff during hypothetical storm
events.
37
Pre-Disaster Mitigation Planning
Source Brian Penix, WV Division of Homeland
Security and Emergency Services
38
Environmental Wastewater Application

• Canaan Valley Institute uses the new elevation
  data to address a major environmental problem in
  the Mid-Atlantic Highlands polluted waters
  caused by inadequate wastewater treatment.

39
Base Layer Application MapWV.gov Base
Map Hillshade and 20-Foot Contours
40
Flood Hazard Application Proximate Base Flood
Elevation
Within FEMA Flood Zone Elevation Feet
587 Meters 179
41
Flood Hazard Application Proximate Base Flood
Elevation
Within 75 Feet of FEMA Flood Zone Elevation Feet
594 Meters 181
42
Project Success

• People Champions
• Private-Public Partnerships
• Funding
• Technical Expertise
• Data completeness
• Testing before production phase
• Automated geoprocessing
• Multiple Quality Controls

43
Thank You!

• Kevin Kuhn
• Kevin.Kuhn_at_mail.wvu.edu