alaska statewide digital mapping initiative goal: map the entire state for digital elevation models...
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Alaska Statewide Digital Mapping Initiative
Goal: Map the entire State
for digital elevation
models and ortho-imagery
Make products available to
public / private interests
to support economic development
MOU Signatories
Dept. of Military & Veterans Affairs
University of Alaska - GINA
Dept. of Natural Resources
build geographic information partnerships in Alaska
leverage resources
promote the visions and goals of the NationalSpatial Data Infrastructure
serve as the technical advisory committee to theAlaska Land Managers Forum
Project Funding
• $33.3 Million Requested over 3 $33.3 Million Requested over 3 yearsyears– 25% State Funding 75% Federal Funding25% State Funding 75% Federal Funding
• $2.0 Million State GF Funded in $2.0 Million State GF Funded in FY07FY07
• Federal Funds Pending – DOD-NASA
Base Map Data FrameworkBase Map Data Framework
In progress
Complete
Elevation (inaccurate)Elevation (inaccurate)
HydrographyHydrography
Geodetic controlGeodetic control
CadastralCadastral
TransportationTransportation
Governmental UnitsGovernmental Units
LandcoverLandcover
BathymetryBathymetry
Elevation (accurate)Elevation (accurate)
Digital OrthoimageryDigital OrthoimageryDoes not exist
Alaska’s Existing High
Resolution Ortho-
Imagery
Plus 12 mountain passes From DMVA not shown ~ 4% of state
General Acquisition Priority AreasFrom Alaska Geographic Data Committee,
Ortho-Imagery Sub-Committee
Color swaths indicate the number of times the area was imaged by SRTM
0 1 2 3 4 ?
1.0 to 2.5 meter Statewide0.5 – 1 meter High Resolution
Specifications
Urbanized area, native villages, major transportation corridors and the Trans-Alaska & Gas Pipelines
~ 10% of the State for ‘Hi-Res’
USGS Quarter-quad format
Meets National Map Accuracy Standards
North American Datum 1983
Uses of digital elevation data:
aspectdrainagewatershed
slopelandform
contourssolar insolation
Geometric corrections for orthoimagery
Derive topographic information
Alaska Control Network Needs Attention for High-Resolution
Imagery
Example: One Meter IkonosSeward – Resurrection River
1. Public Domain – Open Use2. Central Core Storage –GINA3. Decentralized Storage-Users4. Live Access via OpenGIS Protocols and Internet – Multiple Sources for Mapping
Key Points
Alaska needs a new basemap. The paper based maps from USGS are
no longer meeting our needs.
Spatial data infrastructure has significant economic benefits to
the community. Benefit-Cost ratios have been as high as
9 : 1