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Geographical Information Systems - GIS
      

County GIS Maps in Ohio

GIS stands for Geographical Information Systems. GIS allows users to simultaneously view detailed maps and extensive data. GIS is the high-tech equivalent of the map. Many Ohio County Auditors have moved county map information to a GIS system to provide the many benefits of these advanced mapping systems to their county governments. The links below give you quick access to the GIS maps of these counties.

Adams
Allen
Ashland
Ashtabula
Athens
Auglaize
Belmont
Brown
Butler
Carroll
Champaign
Clark
Clermont
Clinton
Columbiana
Coshocton
Crawford
Cuyahoga
Darke
Defiance
Delaware
Erie

Fairfield
Fayette
Franklin
Fulton
Gallia
Geauga
Greene
Guernsey
Hamilton
Hancock
Hardin
Harrison (home)
Henry
Highland
Hocking
Holmes
Huron
Jackson
Jefferson (home)
Knox
Lake
Lawrence

Licking
Logan
Lorain (reg. req.)
Lucas
Madison
Mahoning
Marion
Medina
Meigs
Mercer
Miami (home)
Monroe
Montgomery
Morgan
Morrow
Muskingum
Noble (home)
Ottawa
Paulding
Perry
Pickaway
Pike

Portage
Preble
Putnam
Richland
Ross
Sandusky
Scioto
Seneca
Shelby (home)
Stark
Summit
Trumbull
Tuscarawas
Union
Van Wert
Vinton (home)
Warren
Washington
Wayne
Williams
Wood
Wyandot

What is GIS?

Maps contains information used in different ways by different individuals and organizations: locating ourselves in relation to the world around us, finding telephone wires and gas mains under the streets, locating mineral deposits and, in the case of the county auditor, determining the location and ownership of parcels of property in the county.

The map has been in existence in much the same form for thousands of years but the traditional, printed form has a number of limitations. First, maps have been difficult and expensive to keep up to date. Second, often your area of interest lies on the corner of four adjacent sheets. In addition, maps are often very complex and may require an expert to extract the particular data which are of interest.

In a GIS system all of the different types of map data are stored in a computer and displayed on a monitor or printed on paper. With GIS, the user can determine which area of the map is to be displayed and, which of the different sets of information (roads, settlements, vegetation, etc.) is of interest to him or her. This provides great flexibility, allowing a paper map to be quickly produced which exactly meets the needs of the user.