Creating a grid system is basic to most archaeological sites. Surveying tools are used to create an accurate field, usually with one-meter or half-meter baulks left between the excavation rectangles. In this way levels are uncovered one at a time, with the baulks left until a new level is reached.

Image from: http://www.geocities.com/ra_anana/

Another grid site is in Salonica (Thessaloniki) in northern Greece, the Roman Agora, which is in the middle of the modern city. (ivison slide)

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THE PLANS

Physical characteristics such as walls and floors are recorded for each level, and a plan is produced showing the different occupation features.

Each level is recorded separately, begining with the lowest, here shown in red. Subsequent levels are superimposed on the first plan.

The complete plan shows all levels, distinguished here in different colors.
Images from Isthmia site: http://isthmia.ohio-state.edu/visual.html

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WEB SITES FOR ARCHAEOLOGY

Alexandra Archaeology Museum

http://ci.alexandria.va.us/oha/archaeology/
About Archaeology

http://archaeology.about.com/science/archaeology/
Castle Rock Pueblo Chronology

http://www.crowcanyon.org/researchreports/castlerock/text/crpw_chronology.htm
Archaeology Course

http://www.utexas.edu/courses/classicalarch/index.html
Who were the Sea Peoples?

http://www.reshafim.org.il/ad/egypt/sea_peoples.htm
Sea Peoples Fortified City in Israel

http://research.haifa.ac.il/~webhum/archeology/ahawat/

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