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This is a Non-Federal dataset covered by different Terms of Use than

MD iMAP: Effective FEMA Floodplain

Metadata Updated: July 23, 2021

This is a MD iMAP hosted service. Find more information on The DFIRM Database presents the flood risk information depicted on a given Flood Insurance Rate Map (FIRM) in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital Flood Insurance Study (FIS) database that serves to archive the information collected during the FIS. This map service is a composite of Effective and Preliminary floodplain data. Q3 data is used where neither Effective or Preliminary data is available for a given community. The primary risk classifications used are the 1-percent-annual-chance flood event - the 0.2-percent-annual- chance flood event - and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs) - previously published Flood Insurance Rate Maps (FIRMs) - flood hazard analyses performed in support of the FISs and FIRMs - and new mapping data - where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12 - 000. Last Updated: 03/2016 Map Service Link: ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

Downloads & Resources


Metadata Created Date November 10, 2020
Metadata Updated Date July 23, 2021

Metadata Source

Harvested from md json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 10, 2020
Metadata Updated Date July 23, 2021
Data First Published 2016-07-21
Data Last Modified 2020-01-25
Category Hydrology
Public Access Level public
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 4e6d339d-c790-401c-8120-18d3729582d4
Harvest Source Id ee165ef5-7b35-41a7-b3a5-5479c71b0e58
Harvest Source Title md json
Homepage URL
Source Datajson Identifier True
Source Hash 5bafa5a4a6fe3d5897ee60926d5686831ebbb3e9
Source Schema Version 1.1

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