Bogs, 100 ft Buffer: Anne Arundel County, Maryland

Bogs, 300 ft Buffer: Anne Arundel County, Maryland

Bogs, Contributing Drainage Areas: Anne Arundel County, Maryland

Bogs, Protected Streams: Anne Arundel County, Maryland

Bogs, Wetlands: Anne Arundel County, Maryland

Catchments Clip, Hydrography: Frederick County, Maryland

Catchments, Hydrography: Frederick County, Maryland

Choptank River Heritage Access

2011. Choptank River Heritage Center (CRHC). Public landings and other river access points to the Choptank River and its tributaries, on Maryland's Eastern Shore.

Choptank River Heritage NRHP (National Register of Historic Places)

2011. Maryland Historical Trust (MHT). This map shows NRHP sites in the Mid-Shore counties of Kent, Queen Anne, Caroline, Talbot, and Dorchester, on Maryland's Eastern Shore. Map data wa...

Choptank River Heritage Watershed

2010. USDA-NRCS, 1221 College Park Drive, Suite 100, Dover, DE 19904. Shows watershed of the Choptank River and its tributaries, on Maryland's Eastern Shore.

Dams, Hydrography: Frederick County, Maryland

Feeder Streams, Hydrography: Frederick County, Maryland

FEMA 100 Year Flood Zone: Harford County, Maryland

2018. Harford County Government. FEMA 100 Year Flood Zone, Harford County Maryland.

FEMA 500 Year Flood Zone: Harford County, Maryland

2018. Harford County Government. FEMA 500 Year Flood Zone, Harford County Maryland.

FEMA Digitial Flood Insurance Rate Map Features: Montgomery County, Maryland, 2011

2011. This is a feature class in the geodatabase Floodplain Datasets: Montgomery County, Maryland, 2011. Countywide FEMA flood study published in 2011.

FEMA Digitial Flood Insurance Rate Map Features: Montgomery County, Maryland, 2011

2011. Countywide FEMA flood study published in 2011.

FEMA Flood Insurance Rate Map, Flood Risk Zones: Baltimore, Maryland, 2014

2014. Enterprise Geographic Information Services. Polygon feature representing flood risk as defined by the FEMA Digital Flood Insurance Rate Map database. Last Updated 2014.

Floodplain - Effective Fema Floodplain: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.The Effective Floodplain layer represents the official regulato...

Floodplain - Preliminary Fema Floodplain: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.This layer offers the anticipated floodplain boundaries however...

Floodplain: Baltimore, Maryland

2015. Baltimore City. This dataset depicts flood risk areas in the City of Baltimore.

Floodplain Datasets: Montgomery County, Maryland, 2011

2011. This is a geodatabase of Floodplain Datasets: Montgomery County, Maryland - 2011 FEMA DFIRM flood dataset & Montgomery Planning floodplain project.

Floodplain: Harford County, Maryland

Harford County Government. The regulatory 100-year floodplain is an area mapped by the Federal Emergency Management Agency based upon the probability of that area flooding fr...

Floodplains, Green Infrastructure Project, Montgomery Planning: Montgomery County, Maryland

This is a feature class in the geodatabase Floodplain Datasets: Montgomery County, Maryland, 2011. Floodplains with in Montgomery County derived fr...

Gauges - Stream Gauge Locations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.AHPS Shapefile - Observations - a shapefile of river and ...

Gauges - Tide Gauge Locations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This data layer shows the locations of NOAA tide gauges i...

Hydrographic Areas: Montgomery County, Maryland

Montgomery County Planning Department of the Maryland National Capital Park and Planning Commission. The data set contains hydrographic features as identified from the development of planimetric mapping from aerial photography as part of the GeoMaP...

Hydrographic Areas: St. Mary's County, Maryland, 2017

2017. This is a feature class in the Planimetric Geatures Geodatabase.

Hydrographic Edges: St. Mary's County, Maryland, 2017

2017. This is a feature class in the Planimetric Geatures Geodatabase.

Hydrographic Features: Montgomery County, Maryland

Montgomery County Planning Department of the Maryland National Capital Park and Planning Commission. This is a geodatabase of Hydrographic Features: Montgomery County, Maryland.

Hydrographic Lines: Montgomery County, Maryland

Montgomery County Planning Department of the Maryland National Capital Park and Planning Commission. The data set contains hydrographic features as identified from the development of planimetric mapping from aerial photography as part of the GeoMaP...

Hydrography, Area Features: Montgomery County, Maryland, 2015

2015. Montgomery County Planning Department of the Maryland National Capital Park and Planning Commission. This is a feature class in the geodatabase Planimetric Mapping Features: Montgomery County, Maryland, 2015. The data set contains hydrographic feat...

Hydrography, Edge Features: Montgomery County, Maryland, 2015

2015. Montgomery County Planning Department of the Maryland National Capital Park and Planning Commission. This is a feature class in the geodatabase Planimetric Mapping Features: Montgomery County, Maryland, 2015. The data set contains hydrographic feat...

Hydrography, Edges: Queen Anne's County, Maryland, 2008

2008. Axis Geospatial. This dataset includes ditch lines, streams, marshes, lakes and shoreline.

Hydrology Lines: Baltimore County, Maryland

Baltimore County Web Map Portal. Feature class contains all hydrology lines for Baltimore County. Lines were compiled from aerial photography.

Hydrology Lines: Harford County, Maryland, 2013

2013. Harford County Government. Linear water features. 100' scale photogrammetric mapping compiled Spring 2013.

Hydrology Polygons: Baltimore County, Maryland

Baltimore County Web Map Portal. Feature class contains all hydrology polygons for Baltimore County.

Hydrology Polygons: Harford County, Maryland, 2013

2013. Harford County Government. Hydrology area features; double line streams, ponds, rivers; 100' scale photogrammetric mapping compiled Spring 2013.

Lakes & Ponds: Queen Anne's County, Maryland, 2008

2008. Axis Geospatial. This dataset includes lakes and ponds in Queen Anne's County.

Limit of Moderate Wave Action: Baltimore County, Maryland

Baltimore County Web Map Portal. The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary...

Major Drainage Basins: Baltimore, Maryland

Enterprise Geographic Information Services. Polygon feature representing the major drainage basins within Baltimore City. Last Updated 2008.

Major Streams & Reservoir Polygons: Howard County, Maryland, 2006

2006. Major streams wider than ten feet and reservoir polygons captured as part the the 2006 planimetric update using 6 inch pixel orthophotography as th...

Minor Streams: Howard County, Maryland, 2006

2006. Minor Streams lines less than ten feet wide captured as part the the 2006 planimetric update using 6 inch pixel orthophotography as the source.

National Hydrography Dataset (NHD) Flowline: Potomac

2004. United States Geological Survey (USGS)U.S. Environmental Protection Agency. The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that m...

Navigable Rivers Extent, Delaware Valley Regional Planning Commission: Greater Philadelphia Metropolitan Area

2016. DVRPC-GIS. The DVRPC navigable river layer is a polygon layer representing the extents of the Delaware and Schulykill rivers that are designated for commercia...

Nutrient Management Setbacks From Waterways - Large Rivers, Lakes and Ponds (10 Ft. Buffer): Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This is a 10 foot buffer area along large rivers, lakes a...

Nutrient Management Setbacks From Waterways - Large Rivers, Lakes and Ponds (35 Foot Buffer): Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This is a 35 foot buffer area along large rivers, lakes a...

Nutrient Management Setbacks From Waterways - Large Rivers, Lakes and Ponds: Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This layer is extracted from The High Resolution National...

Nutrient Management Setbacks From Waterways - Pda (10 Foot Buffer): Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This is a 10 foot buffer area along PDA ditches where fer...

Nutrient Management Setbacks From Waterways - Pda (35 Foot Buffer): Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This is a 35 foot buffer area along PDA ditches where fer...

Nutrient Management Setbacks From Waterways - Public Drainage Association Ditches (Pda): Maryland

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This layer is a network of public ditches that cover larg...