A grid is established over the site, so that artifact locations can be plotted. A sketch map is created for each level of each unit or feature. Individual artifacts are also plotted where they form clusters or patterns.
A site is like a layer cake, and the different layers represent different activities. Archaeologists must understand the vertical placement of artifacts in order to know what happened over time. Drawing the cross-section of a feature or unit allows these vertical zones to be recorded and interpreted.
Without a good record of what was done at a site, what was found, where it was found, and under what conditions, excavation is just destruction. Records are created for each site, unit, and feature. Tags identify all artifacts. Photographic records, surveying records, and a wealth of other documents are created. These records are critical to the project, and are kept on file permanently.
Photography and Other Documentation
Photography (film, digital, video) is essential to documenting the process of archaeological excavation. Photos capture subtleties not otherwise documented. They also provide a strong visual images to help understand the archaeological materials in their context.