DIGITAL TOOLS SUPPORT THE PROTECTION OF HISTORIC PROPERTIES
Agencies were asked to report on whether they utilize digital information to protect historic properties in the context of the effects of climate change. Various examples were shared by agencies utilizing state-of-the-art technology to monitor and record buildings and sites.
• The BLM Pinedale Field Office and Wyoming State Office staff used 3D photogrammetry models to document rare rock art panels near Pinedale, Wyoming, preserving the petroglyphs for posterity and future study. With 3D photogrammetric models, full and permanent records of these resources may be collected, so sites may be studied and appreciated long after the original panels erode. • The USFS Northern Region heritage program is developing a management plan based on a risk assessment strategy that will identify and prioritize historic properties with highest exposure and risk to climate change impacts for adaptation measures designed to reduce these impacts. Additional information on this program is provided in a Case Study on page 58. • The Space Launch Delta 45 (SLD 45)
3D models of petroglyphs at Calpet Rock Shelter depict erosion over time. (Top) High accuracy 3D photogrammetric model from 2021. (Bottom) Low accuracy 3D photogrammetric model from photos taken during 1987 recordation of the site. (Sam Cox/BLM)
of the U.S. Space Force continued its decade-long initiative to use 3D laser scanning to digitally preserve National Register-eligible facilities. Most recently, the SLD 45, through terrestrial laser scanning and 3D spatial technologies, digitally recorded the Cape Canaveral Lighthouse site, which is subject to deterioration and sea-level rise due to climate change, for purposes of preservation planning and management, archiving, and educational programs. • The USACE Seattle District partnered with the Kootenai National Forest to contract the use of drones at Lake Koocanusa and Lake Pend Oreille to monitor erosion at remote archaeological sites. Using information gathered by the drone, an ArcGIS story map illustrating changes to the landforms from 2018 to 2021 was produced.
USACE Small Unmanned Aircraft System crew checking wind speed and direction prior to aerial drone survey of archaeological sites at the Albeni Falls Dam Operating Project, ID. (Jacques Kerkhove-Peltier/USACE)
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IN A SPIRIT OF STEWARDSHIP: A Report on Federal Historic Properties • 2024 | 57
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