Description: MassGIS derived these contours from the USGS 2021 Central Eastern MA Lidar Project data.The Hydro-enforced digital elevation model (DEM) and water's edge breaklines were processed in ArcGIS Pro 3.0.3 using the Contours with Barriers3D Analyst Tool using a contour interval of 0.3048 (meters).The resultant isolines' meter elevations were then multiplied by 3.28084 in a new field to display the elevations with a vertical resolution of 1.0 foot