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Common Terms
Cadastral Maps-- Also known as parcel or tax maps, these diagrams provide detailed information regarding the location, identifier numbers and dimensions of each property parcel in Charleston County.
GIS(Geographic Information Systems)-- A computerized database system which allows capture, storage, retrieval, analysis and display of spatial or geographic data with the ability to produce and manipulate the graphic elements of a map.
Hydrography-- The mapping of bodies of water.
Orthophotography-- Aerial photography services used in developing maps and verifying information for digital conversion.
PID Number (Parcel Identification Number) --Also known as a TMS number, it is a reference number containing information necessary to identify and locate a particular property parcel.
Planimetric Maps-- Maps that include features identifiable through aerial photography. Features include items such as buildings, roads, tree lines, pavement edges and water.
TMS Number (Tax Map Sequence Number)-- Also known as a PID number, it is a reference number containing information necessary to identify and locate a particular property parcel.
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History
The Charleston County Assessor initiated the first mapping program in 1967 with aerial photography of the entire county. From these photos, the County produced 750 tax maps depicting 80,000 properties.
In 1991, the S.C. Department of Revenue outlined requirements each county must follow for the creation and maintenance of tax maps. Counties must have aerial photography re-flights at least once every 10 years, and the maps created from the aerial photography must conform to rigorous standards.
The GIS Division was created in 1996 under the Director of Assessments and Mapping. Iin 1997 merged with the Mapping Division to form a separate department. In 1998, it became a division of the Assessor's Office. In 2001, the department became a function of the Chief Information Officer.
Interesting Facts
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