Recovery and Readjustment of Historical Ocean Coast Control Stations in Oregon
Publication: Journal of Surveying Engineering
Volume 148, Issue 2
Abstract
In 1967, as directed by the Oregon Beach Bill, the Oregon State Highway Department undertook a survey of the entire coast to delineate the shore zone boundary. Survey control points and photo control were established for an aerial survey that same year, but only hardcopy records currently exist. If the 1967 survey coordinates can be accurately updated, the aerial imagery can be processed in modern photogrammetric software to produce digital elevation models of the entire coast, which will enable volumetric coastal change analysis over a period of half a century. The goal of this study was to develop and test a procedure for combining historic and current horizontal traverse survey data to update the 2D control survey coordinates (with the intent to add leveling data and extend the procedures to obtain 3D coordinates in a later study). First, a custom workflow and algorithms were developed to convert the historical survey records to machine-readable format. GNSS data—both static postprocessed and real-time network (RTN)—were then acquired for recoverable marks. An adjustment of the traverse data constrained to RTN coordinates was compared against an independent adjustment of the static GNSS data performed in the National Geodetic Survey OPUS-Projects software. The results show that the methods can produce updated horizontal coordinates for the 1967 survey accurate to within two centimeters.
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Data Availability Statement
The measurements and adjusted coordinates of the YB traverse line are available at https://files.prd.state.or.us/s/fi3xLzmGzCpCpm8. Additional data from this project will be made publicly available by OPRD at the completion of the research project.
Acknowledgments
This research was conducted with funding from the Oregon Parks and Recreation Department (OPRD) and carried out under Intergovernmental Agreement No. 8523 between OPRD and Oregon State University, authorized under ORS 190.110. Some of the material in this paper has been adapted from a final report submitted to the research sponsor. The data and results of this study were intended strictly for research. Mention of a commercial product in this paper does not constitute an endorsement.
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Information & Authors
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Published In
Journal of Surveying Engineering
Volume 148 • Issue 2 • May 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jan 7, 2021
Accepted: Sep 24, 2021
Published online: Dec 17, 2021
Published in print: May 1, 2022
Discussion open until: May 17, 2022
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