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

britta_Schroeder@nps.gov

Nic Kinsman

nicole.kinsman@noaa.gov

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