The Town maintains IA mapping in our Geographic Information System (GIS). The Wellesley IA data is updated approximately every five years based on new aerial photogrammetry and LiDAR3. The DPW Engineering Division will routinely update the IA layer data. You can explore impervious area measurements for FY23 billing using the Stormwater Property Viewer on our website.
3 Lidar — Light Detection and Ranging — is a remote sensing method used to examine the surface of the Earth.