Subsurface Imaging

HAR owns a state-of-the-art GSSI SIR 4000 Ground Penetrating Radar (GPR) system. This instrument is utilized to record minute variations and disturbances in sub-surface soil permitting non-invasive investigation of both historic and prehistoric cultural deposits. Electromagnetic detection techniques may be effectively employed in relatively wide area survey resulting in a spatially oriented graphic overview that permits investigators to focus attention in areas exhibiting sub-surface anomalies.

HAR has empirically developed high resolution survey procedures that utilize multiple electronic measurement techniques, in conjunction with precision site survey and mapping, to identify and pinpoint buried features. Since early in 2000, HAR personnel have relied upon geophysical data collection technologies to locate and accurately map unmarked and or undefined 19th century pioneer cemeteries. More on cemetery survey

Precision Survey & Site Mapping

Precision GPS survey and GIS mapping techniques are clearly the logical solution if an accurate and cost effective approach to deriving and analyzing spatially related data is the question. We realized the potentials of GPS/GIS in early 1993 and have utilized these survey and data analysis disciplines in many of our projects since late 1994. Sub-meter GPS survey data coupled with the GIS capability to analyze archaeological field data both graphically and statistically is a service and product that HAR pioneered.

In an effort to meet stringent client requirements and to ensure full service survey and mapping capabilities, HAR also provides (cm resolution) GPS as well as electronic total station data collection services.

Metal Detection

Metal detection technology may be applied in fieldwork where project objectives merit the efficient collection of metal artifacts. Over the last 24 years, general guidelines and procedures for establishing metal detection survey parameters and equipment selection for use on historic archaeological sites have been developed by HAR personnel.

HAR owns a full compliment of detectors including both land and underwater VLF and pulse induction instruments, 100 kHz TR two-box type detector and hand-held magnetometers. In addition to a staff of technicians with experience in metal detection reconnaissance, HAR employs experienced metal detector technicians part-time who have exhibited the essential skills and discipline to assist us on various projects. In short, we have the technology, experience and personnel to accomplish intensive metal artifact recovery under virtually any environmental conditions and on any size project.

GIS Spatial Analysis

GIS software is a natural platform with which to assemble archaeological data for analysis and presentation. ArcView GIS is the established standard for desktop GIS analysis and map preparation. Geographic data, such as site or artifact location coordinates, may be merged with database or spreadsheet data and queried thematically for analysis.

Digital cartographic resources including, but not limited to, USGS 7.5-minute quadrangles, aerial images, geographic feature shapefiles and Computer Aided Design (CAD) vector drawings are used to create georeferenced base map layers. HAR maintains a growing archive of digital materials and will attempt to support any map theme requested by our clients.

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