One or more computing devices, systems, and/or methods for identifying polygons that are accurate representations of geographical boundaries of properties are presented. For example, a polygon may be selected from a database of polygons. The polygon may comprise a representation of geographical boundaries of a property associated with an entity. The polygon may be associated with a location and/or a size. A location database may be analyzed to identify a second location associated with the property. An offset distance may be determined based upon the location and the second location. The database of polygons may be analyzed to determine an expected size of the property based upon a plurality of polygons associated with the entity. A size difference between the expected size of the property and the size may be determined. A quality score associated with the polygon may be generated based upon the offset distance and the size difference.