7 Geologic mapping in the digital age: products, workflows, and methodologies (Posters)
This session will highlight geologic maps and their derivatives, showcasing products that leverage innovative digital methods and workflows, novel application of remote sensing data, and integration of advanced data processing techniques.
Sunday, 22 March 2026
8:00 AM - 12:00 PM
CCC, Ballroom C
A Multi-Method Approach to Mapping: Compilation Bedrock Geologic Map of a portion of the Everett East, Hopewell, Martinsburg, and Entriken 7.5-Minute Quadrangles in Bedford and Huntingdon Counties, Pennsylvania
Paper number: 7-5
Program: Technical Sessions
Time: 8:00 AM – 8:00 AM
Authors
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Hayden ThackerBureau of Geological Survey, Middletown, Pennsylvania
Abstract
As part of the Earth MRI initiative, we conducted a multi-method geologic mapping project in a portion of Bedford and Huntingdon Counties, Pennsylvania. We utilized previous geologic maps, lidar, red relief imagery, and new field mapping to create a seamless 1:24,000-scale compilation bedrock geologic map of portions of the Everett East, Hopewell, Martinsburg, and Entriken 7.5-minute quadrangles. Mapped geologic units ranged from the Ordovician Reedsville Formation through the Devonian Foreknobs Formation.
Preliminary contacts were drawn at topographic inflections using lidar and red relief images in ArcGIS Pro. These contacts were field verified with data collection facilitated by ESRI FieldMaps paired with a BadElf GPS receiver. This iterative approach allowed us to refine the accuracy of our map. Contacts that are not evident by topographic expression were mapped in the field using the same data collection methods. The lidar and red relief images were largely successful in placing contacts that are marked by changes in topography, with some small adjustments needed following field verification. Collaboration between project members was facilitated using ArcGIS Online, with GIS data shared via cloud-based services. The final bedrock map and associated cross sections were produced using ESRI’s ArcGIS Pro 3.3.5.
The new compilation map depicts adjustments and refined control on contacts from previous mapping, newly recognized structures and resultant changes in the identification of some geologic units, and updated map unit descriptions. This integrated approach provided a more efficient workflow to geologic mapping through iterative improvements and digital collaboration. This work advocates for utilizing modern technologies and leveraging diverse skillsets in a joint effort to improve future geologic mapping projects.
Geological Society of America Abstracts with Programs. Vol. 58, No. 2
doi: 10.1130/abs/2026NE-411257
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