More Logan County GIS data online
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[March 16, 2010]
Through a partnership with the
Logan County Emergency Telephone Systems Board, more data can now be
seen on the county's Internet mapping Web site. Ambulance, fire
protection and law enforcement boundaries can all be viewed on the
Web. The new data also shows addresses for all rural residences,
roadways and streams.
The Logan County Geographic Information System can be viewed online.
To view the various mapping layers that have been created, visit
A geographic information system is a digital map comprised of a
limitless number of layers that can be overlaid on top of one
another to create a customized map of an area. These layers are
typically comprised of a database with a spatial reference. In
short, it attaches the "what" of a database with the "where" of a
map. Imagine being able to click on any feature of a map to learn
more about it. A GIS system can be a useful tool for everyone from
the casual user to the highly trained professional.
Logan County's GIS took shape with a grant from the Illinois
Department of Transportation to assist the county with establishing
a GIS system. The grant money was directed through the county
highway department and was used to purchase aerial photography and
other data. This photography has become a base layer of the GIS.
Logan County worked with a specialized company from northern
Illinois to develop a parcel mapping layer for the GIS. This layer
is comprised of every land parcel within Logan County, drawn
accurately on a base map. This enables the assessor's office to
assess property with more accuracy. Combined with the new digital
soils layer, farmland can now be assessed based on soil
productivity, using the number of acres of each soil type. This can
all be calculated electronically.
This parcel map can be overlaid with the aerial photography layer
and the roadway centerline layer to pinpoint health hazards, show
properties for sale, highlight vehicle accident locations or assist
emergency response teams in planning a route.
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Logan County hopes to develop more layers, including municipal
boundaries, voting districts, enterprise zones, zoning districts and
school districts. The GIS system will allow a person to investigate
any area of the county simply by clicking their computer mouse.
The GIS system is primarily funded by a recording fee collected
by the county clerk's office.
The GIS committee is comprised of representatives from Lincoln,
Atlanta, Mount Pulaski, Emden, Logan County Board, various elected
or appointed Logan County officials, Logan County Emergency
Management Agency, Logan County Regional Planning Commission,
Lincoln & Logan County Development Partnership, and the Natural
Resources Conservation Service. Currently, the GIS committee is an
advisory committee for the county board, which is accountable for
the GIS fund.
[Text from file received]