Theme: Archeology

Description: Archeological Citation Densities (National Archeological Database - NADB)

Region: Conterminous United States

Data Type: vector

Scale: 1:25M

Projection: Lambert Azimuthal Equal Area (oblique aspect)

Datum: NAD83

Attributes: Number of citations per square mile

Data Sources:

Archeological data: 2004 Citation counts extracted from the National Archeological Database (NADB)

County and state boundaries: ArcUSA 1:25M, 1992,ESRI

County Area: County and City Data Book, 1988, U.S. Dept. of Commerce, Bureau of the Census.

History of known manipulations made prior to data acquisition: N/A

Data Provider: N/A

Distribution format: N/A

History of manipulations performed at CAST:

Layer created with ArcGIS by assigning citation counts divided by the county area to county data layer. Oracle was used to store, manipulate and format the tabular data.

Layer Date: 2004