Frequently Asked Questions

A GIS is a Geographic Information System. GIS software represents features on the earth, such as cities, roads, addresses, etc. in a digital map and database. People use GIS to visualize, question, analyze, and understand this data. GIS makes map data interactive and therefore, much more useful.

If property pins (generally made of iron or steel and long enough to extend below the frost line) were set, your property lines may be found utilizing a metal detector to locate the pins of your property. If you can locate one pin, you may utilize the recorded plat or deed or the County Parcel Viewer map to help with dimensions to establish the general locations of the remaining pins or the general location of the boundaries of your property.

The only guaranteed way to determine the exact location of your property lines is to hire an Illinois Licensed Professional Land Surveyor (PLS) to survey/resurvey the property. 

Civil disputes over the location of property lines with adjoining private properties is not within the enforcement authority of Whiteside County.

Whiteside County established a GIS in 2004 with the original purpose of providing a base map of all the properties in the county for use by the Assessor’s office. However, the GIS has expanded to include many other forms of data used by several county offices. Parcel map maintenance and supporting the tax assessment process are the main focus of the GIS office. However, we also have layers that support E911 and public safety, election, and voting information, data that help in decision-making by the Building and Zoning and Economic Development offices, along with many other forms of data and maps.

Whiteside County GIS can provide custom map prints in-house. In addition, the GIS parcel maps are viewable online through our Parcel Viewer.

• Map Print Fee Schedule (PDF)