Client-oriented professionals meeting
compliance needs in archaeology,
history, and environmental studies.

Geographic Information Systems

Geographic Information Systems

Geographic Information Systems (GIS) have redefined mapping.  At PTA data from the GPS are downloaded daily into the GIS for electronic tracking of the survey progress and findings.  Maps generated with the GPS data also enable key personnel to examine survey coverage and determine if areas require more attention.  Discriminating positive shovel tests from negative units enables supervisors to plan for more efficient use of recording time, predict density in unsurveyed areas, and obtain a preliminary assessment of site distribution.

PTA currently has several programs which are used in conjunction with the GIS and are key to the production of maps and maintaining GIS data. These programs include:

  • Surfer
  • GeoMedia
  • ArcView
  • Microstation
Surfer is used in conjunction with the total station in producing contour maps of testing sites.  GeoMedia is mainly used for the maintenance of the GIS; however, GeoMedia is a versatile program that allows PTA to take in all formats of GIS data. The GPS units download directly into GeoMedia and the data can be exported from the program into any GIS file format for the customer.
Surfer Image of Kitchen and Personal Artifacts at a Historic Site
-->