ArcGIS Online for Maryland. (2018). Lidar-Derived Dem In Feet, Maryland Imap: Washington, D.C., 2014. State of Maryland. http://data.imap.maryland.gov/datasets/c9d0a28ec0fa4126a8da5879faeeee73

Available from: https://geo.btaa.org/catalog/c9d0a28ec0fa4126a8da5879faeeee73