Geophysical survey has transformed mapping in the field of archaeology. It is used to create maps and images of subsurface features which are then utilized to better position excavations, saving money and time. This method of archaeology is less invasive and allows for a better focus on preservation, especially for culturally sensitive sites such as cemeteries. PTA recognizes that control of data quality and spatial accuracy are critical in archaeology and when used properly, geophysical survey can produce precise, valuable results.
Geophysical survey equipment has been adapted and improved over the years to better suit the needs of archaeologists. Not only is it useful for locating large subsurface features such as structures, it can also identify smaller items like nails or metal fragments and even decaying organic material from wooden posts or structures.
- Electrical Resistance Meters
- Ground Penetrating Radar
- Electromagnetic Conductivity Meters
- Metal Detectors
With advances in geophysical technology and an increasing variety of equipment, this method is very effective in any type of terrain and conditions, making this a cost-effective, non-invasive, and highly accurate tool for cultural resource management. PTA has employed these tools and methods on a number of projects and stays current on any advancements in this area.