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National Geodetic Survey
Benchmark Recovery Project Denali National Park and Preserve
Britta Schroeder, GIS Specialist, NPS
Nic Kinsman, Alaska Regional Advisor, NGS March 9, 2017
Outline
• History of Benchmarks
• Importance of Benchmark Recovery
• GPS on Benchmarks
• Outreach and Education
• Next Level
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HISTORY
National
Statewide
Denali
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What is NOT a benchmark?
Pre-2015 Current
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Photo courtesy of J. Yates
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Photo courtesy of J. Yates
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History
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SIGNIFICANCE
National Spatial Reference System
Local to Global Coordinates
Installations
Cultural
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National Spatial Reference System
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Local and Global Coordinates
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GPS ON BENCHMARKS
Recover
Observe
Report
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Recover
Print benchmark datasheets
Load datasheet coordinates into
GPS units
Observe
All recoveries
• Gather GPS coordinates
• Take photos
• Assess as candidate for base survey
Base Surveys
• Collect 4+ hours of survey-grade GPS data
• Take photos
• Measure HI
Report
All recoveries
• Submit mark survey form to NGS
Base Surveys
• Submit survey data to OPUS Shared Solutions
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Reconnaissance and Recovery
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1200 feet
504 feet
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~ 200 feet
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Observe
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Ph
oto
s
Eq
uip
me
nt
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Report
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OUTREACH AND EDUCATION
Geospatial Youth Events
Volunteers
Partners
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Technology in Wilderness
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NEXT LEVEL
DENA
NPS
Alaska
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Photo courtesy of J. Yates
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Guidance
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References and Resources
• National Research Council (U.S.). Committee on the Alaska Earthquake. The Great Alaska Earthquake of 1964, Seismology and Geodesy. 1972. Washington, D.C. National Academy of Sciences
• NGS website
• U.S. Geological Survey Photo Library
• University of Alaska Photo library
Britta Schroeder
Nic Kinsman
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