Project Details

Drone/Drone Support


Tonto National Monument and Tumacácori National Historical Park, AZ
US National Park Service

Harris Environmental worked with the National Park Service at two park units. First, we mapped two 17th Century missions (Los Santos Angeles de Guevavi and Calabasas Convento), part of Tumacacori National Historic Park. With LiDAR, we scanned the standing structures of both missions, developed 3D TIN Models, produced planimetric site maps, and architectural wall sheets. Our data was geo-referenced, and the scanned data had a resolution of 1mm accuracy for all the wall surfaces, and the surrounding terrain was mapped at 10cm contour intervals. The planimetric maps consisted of 2D digital vector data, at 10 cm topography, with wall tops, wall bases, wall features, and other archaeological features located within the site boundaries.

Second, at Tonto National Monument, Harris Environmental mapped 10 backcountry rockshelters, a Salado fieldhouse, and a portion of a historic road along with several water crossing features. Each map included in-situ architecture, wall fall (mapping individual rocks), buried or mounded features, depressions, drainages, significant flora, bedrock, rockshelter extent, artifact scatter areas/boundaries and diagnostic artifacts. Harris Environmental also produced scaled photographs of standing architectural wall faces at 14 sites. The high definition photographs were 2D digital images of scaled color-corrected, color photography so that measurements for future documentation and stabilization events can be superimposed on the images.

Double-Crested Cormorant Population Enumeration

USACE (US Army Corps of Engineers) Portland District,
as a sub-consultant to David Smith and Associates

We evaluated the status of the Columbia River Estuary population of nesting double-crested cormorant for the USACE, Portland District. This effort supported the USACE management plan to reduce predation of juvenile salmonids in the estuary. The enumeration and monitoring work was primarily conducted by field and photogrammetric surveys that use high resolution stereo imagery technology. General reconnaissance by boat and aircraft was used to supplement the detailed field and photogrammetry surveys in areas of limited visibility. Reconnaissance was also conducted to identify key loafing and roosting areas, and identify new nesting areas. This project had a very tight time frame, with little flexibility for field work delays. We established a new and efficient methodology using remote sensing to estimate nest counts and to distinguish between cormorant species. We incorporated GIS technologies to plan fieldwork, map nesting sites, and produce reports. We ensured data collected with these new methods met project needs and maintained compatibility with past nest location studies to allow direct comparisons to previous results.