nps accurate elevations - global positioning system · nps accurate elevations support of sea level...
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NPS Accurate Elevations
Support of Sea level Rise Science and Planning for Coastal National Parks
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Accurate Elevations
Two Facets to Park Elevations:
• Establishing survey monumentation to support current and future park planning and science.
• Establish precise elevations including local tidal heights on NPS assets.
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Survey Monumentation
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Survey Monumentation
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Survey Monumentation
Survey Monumentation at
Assateague National Seashore
Backbone Monumentation
(Survive in perpetuity)
Sentinel Site Monumentation
(May survive but located at
important management sites
for the park)
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Accurate Elevations
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Accurate Elevations
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NAVD88 - Father’s Point, OntarioFather’s Point
Accurate Elevations
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Accurate ElevationsEstablish Local Tidal Datum Heights
Golden Gate and Marin Headlands National Parks
Location of Tide Station
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Accurate Elevations
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Accurate Elevations
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Accurate Elevations
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Accurate Elevations
Tide Station
Supporting survey monumentation
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Accurate Elevations
Supporting survey monumentation
Tide Station
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Accurate Elevations
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Accurate Elevations
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Accurate Elevations
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Accurate Elevations
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Accurate Elevations
Resulting Elevations:
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Tim SmithNational GPS Program Coordinator
National Park Service
IR, NISC, RISD
(303) 884-3692
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Survey Monumentation