SHAThis layer contains detailed outlines of Maryland counties. The Maryland land county boundaries were built using political county boundaries and the National Hydrology Data (NHD). Land boundaries are a key geographic featue in our mapping process. This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov . Last Updated: Unknown Feature Service Link: https://mdgeodata.md.gov/imap/rest/services/Boundaries/MD_PhysicalBoundaries/FeatureServer/0ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/2315ef0b071a4ec59420e3d342dbcfe2_0engMaryland iMapPublicMaryland Physical Boundaries - County Boundaries (Detailed) [Maryland]Web servicesMarylandLast Modified: 2025-05-12