MDEThe Effective Floodplain layer represents the official regulatory floodplain as adopted by FEMA and a given local community for the National Flood Insurance Program (NFIP). Effective data should be used wherever it is available, but it is not available statewide. This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov . Feature Service Link: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Floodplain/FeatureServer/1 **Please note, due to the size of this dataset, you may receive an error message when trying to download the dataset. You can download this dataset directly from MD iMAP Services at: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Floodplain/MapServer/exts/MDiMAPDataDownload/customLayers/1 **ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c3d901cca2d8411f9b368b2d16e76f9e_1engMaryland iMapPublicMaryland Floodplain - Effective FEMA Floodplain [Maryland]Web servicesMarylandLast Modified: 2025-05-12