Using GIS to Identify Historical Landmark Properties


The City of Lake Forest’s Community Development Department recently
requested that a GIS layer be created to display Local Historic
Districts and Landmarks. Lake Forest is divided into five historical
districts, each containing historical landmark properties. Community
Development needed a method of knowing where the historical districts
were located while simultaneously being able to identify district land
parcels that contained historical properties.

In GIS, all Historical Landmark properties were geocoded and
displayed over the Historical Districts layer. To avoid having a cluster
of geocoded landmark property points, a spatial join was performed to
allow users to select a land parcel and quickly identify all landmarks
properties that reside on that given parcels. For example, Lake Forest
College has 17 campus buildings located on one parcel. Rather than
having 17 location points, the location data is stored within the land
parcel. Selecting one parcel will allow users to view all buildings/
properties on that selected parcel.

The results of this project allow users an effective method of
visualization that avoids map clutter and enables a more legible method
of reviewing historical location data. Community Development can use
this location data to manage new construction projects within these
historical areas.​