Aerial Imagery and Remote Sensing Services (AIRSS)
Through aerial imaging, mapping, and geophysical surveys, coupled with Geographic Information System (GIS) services, we document and interpret complex data and produce high-quality, professional products. We embrace emerging technologies to better understand archaeological and historic resources using non-invasive techniques.
Our Services
Ground-Penetrating Radar (GPR)
GPR is used to detect buried archaeological features, image buried structural remains, identify unmarked graves, assess stratigraphy, and create archaeological potential models.
Magnetometry
Magnetic gradiometer surveys identify important features, especially precontact archaeological features, in addition to providing geological and sedimentary information to aid archaeological investigations.
Unpiloted Aerial Vehicles (UAVs; drones)
UAVs are used to quickly and efficiently map cultural resources. Our operators capture bird’s eye images and video of archaeological and architectural resources, landscapes, and other features being investigated. Through collecting LiDAR data and photogrammetry, we can detect subtle features to create landscape models in 2D and 3D environments.
GIS/Cartography
HRA uses ArcGIS to collect, store, and share data in near real-time or off-line field project environments. Our data-collection systems, combined with the latest-generation software, allow us to conduct spatial research, design and manage geodatabases, provide modeling, and produce professional cartographic products.
McLeish Cemetery Geophysical Investigations
HRA was hired by the Braun family of Geyser, Montana, to conduct geophysical investigations at the McLeish Cemetery. The cemetery sits at the base of the Highwood Mountains in rural central Montana. Members of the Braun family remember more visible graves from when they were young in the early 1940s than what are currently marked. HRA staff utilized ground-penetrating radar, magnetic gradiometry, and UAVs to aid their search for unmarked graves. In the end, HRA identified 12 graves, 5 of which were unmarked.