Every year the City of Park Ridge, IL contracts with a photogrammetric firm in order to collect important planimteric data such as buildings, driveways, sidewalks, etc. in a computer usable digital format. This data is fundamentally important as it provides a backbone for a Geographic Information System (GIS) and allows for in-depth analysis that can help a city understand the scope of what lies within their city limits. Whether it is counting how many homes are within a floodplain or estimating how many sidewalk squares a community must review each year, this planimetric data has its use. For without it, local governments would have to resort to alternative methods such as laborious field checks or manual counts in a Sidwell parcel map atlas.