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Tamia Rudnicky
Comprehensive Coastal Inventory Program, Center for Coastal Resources Management, Virginia Institute of Marine Science
(804) 684-7181
P.O. Box 1346
Gloucester Point
Virginia
23062
US
ArcGIS Metadata
1.0
Maryland Shoreline Stabilization Model (SSM)
2021-06-26T00:00:00
2022-02-28T00:00:00
2023-08-15T00:00:00
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
PO Box 1346
Gloucester Point
Virginia
23062
US
1375 Greate Road
vector digital data
Center for Coastal Resources Management. 2023. Maryland Shoreline Stabilization Model. Center for Coastal Resources Management, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, Virginia.
Tammy K. Roberson
Maryland Department of the Environment
1800 Washington Boulevard
Baltimore
Maryland
21230
tammy.roberson@maryland.gov
US
410-537-3522
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:7 0 7 0;"><SPAN>The Center for Coastal Resources Management (CCRM) at the Virginia Institute of Marine Science (VIMS) has been developing tools for several years to guide local governments in shoreline management. In particular, they have focused on the use of ecologically preferred alternatives for erosion control and have conducted research into refining the appropriate uses for a large suite of possible treatments based on existing shoreline conditions. A series of Decision Trees were developed to determine shoreline best management practices when conducting onsite inspections. These were developed to support integrated guidance at the management and regulatory level.</SPAN></P><P STYLE="margin:7 0 7 0;"><SPAN>This body of work has been expanded and re-developed as a GIS spatial model known as the Shoreline Management Model (SMM) to determine appropriate shoreline best management practices from the desk-top using available spatial data and the decision tree logic. The assessment is conducted at parcel level scale but the output represents a reach based or cumulative approach to shoreline management. The variables used in the SMM include fetch, nearshore bathymetry, bank height, marsh presence, beach presence, and permanent structures within the riparian zone. Also included are existing shoreline erosion control structures, and the presence of submerged aquatic vegetation (SAV) to enhance the models capabilities for evaluating best management practices along shorelines that have already been hardened or where erosion control practices may impact SAV.</SPAN></P><P STYLE="margin:7 0 7 0;"><SPAN>Data presented here has been developed for the Maryland Department of the Environment (MDE) utilizing the Virginia SMM with adaptations to reflect conditions and policies in Maryland. This includes the addition of buffered habitat areas for rare, threatened, and endangered (RTE) species, and federal navigation channels, and modification to the output recommendations and definitions.</SPAN></P><P STYLE="margin:7 0 7 0;"><SPAN /><SPAN /></P></DIV></DIV></DIV>
To provide a recommended preferred approach for shoreline erosion control via a geospatial Shoreline Stabilization Model that identifies where living shorelines are suitable.
Maryland, Chesapeake Bay, Anne Arundel County, Baltimore City, Baltimore County, Calvert County, Caroline County, Cecil County, Charles County, Dorchester County, Harford County, Kent County, Prince George County, Queen Annes County, St. Marys County, Somerset County, Talbot County, Wicomico County, Worcester County
ISO 19115 Topic Categories
environment
elevation
planningCadastre
geoscientificInformation
biota
Maryland Shoreline Stabilization Model, Shoreline Management Model, Shoreline Suitability Model, Living Shorelines, Shoreline Conditions, Shoreline Structures, Riparian Land Use, Shoreline Inventory, Erosion Control, Shoreline Treatments
environment
Shoreline Stabilization
Shoreline Management Model
Shoreline Suitability Model
Living Shorelines
Shoreline Conditions
Shoreline Structures
Riparian Land Use
Shoreline Inventory
Erosion Control
Shoreline Treatments
elevation
planningCadastre
Maryland
Chesapeake Bay
Anne Arundel County
Calvert County
Dorchester County
Talbot County
geoscientificInformation
biota
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>These data should be used to guide the decision making process on how best to manage an erosion problem. Recommendations are made without consideration of property length, ownership, or value. Treatment recommendations are based on models that utilize best available data which may not reflect the actual conditions present on the shoreline.</SPAN></SPAN></P><P STYLE="margin:7 0 7 0;"><SPAN>The Center for Coastal Resources Management (CCRM) at VIMS performs a service by distributing data generated by either CCRM or public agencies, which offer data without restriction or charge. CCRM assumes no responsibility for data accuracy or precision, metadata completeness or correctness for digital information. CCRM assumes no liability for misuse of any data which may arise as a result of any alteration, conversion, or combination with other data sources. As well, the timeliness and scale of these products must be considered when evaluating appropriate use. </SPAN></P><P><SPAN STYLE="font-weight:bold;">Maryland Department of the Environment (MDE) disclaimer</SPAN><SPAN>: The Mapping Services provided herein are for reference only. The user of this information understands and acknowledges that the map data may be inaccurate or contain errors or omissions, and the user assumes the full responsibility for any risks or damages resulting from any use of or reliance upon this data. Maryland Department of the Environment (MDE) and its Agents or Affiliates do not guarantee the accuracy or reliability of the data generated from this service.</SPAN></P><P><SPAN>Use of the mapping tool is strongly encouraged for preliminary planning purposes, however, its use does not guarantee the approval of any authorization or shoreline project. Please contact the MDE Tidal Wetlands Division at (410) 537-3837 for coordination on specific projects.</SPAN></P><P><SPAN><SPAN>This project has been funded wholly or in part by the United States Environmental Protection Agency under assistance agreements. The contents of this document do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does the EPA endorse trade names or recommend the use of commercial products mentioned in this document.</SPAN></SPAN></P><P><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV>
ground condition and currentness of associated datasets.
2016-10-01T00:00:00
2018-10-01T00:00:00
This project has been funded wholly or in part by the United States Environmental Protection Agency under assistance agreement CD-963623-01-1 to the Maryland Department of the Environment for 2019 - 2020; by the United States Environmental Protection Agency State Wetland Program Development Grant CD FAIN 963822-01-0 to the Maryland Department of the Environment for 2020 - 2021; and by the United States Environmental Protection Agency State Wetland Program Development Grant CD FAIN 96390701-0 to the Maryland Department of the Environment for 2021- 2023.
These data have been produced by the Center for Coastal Resources Management (CCRM), Virginia Institute of Marine Science (VIMS) for Maryland Department of the Environment (MDE).
Karinna Nunez
Comprehensive Coastal Inventory, Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
1375 Greate Road, P.O. Box 1346
Gloucester Point
Virginia
23062
karinna@vims.edu
US
804-684-7273
CCRM Geospatial Modeling Manager
Tammy K. Roberson
Maryland Department of the Environment
1800 Washington Boulevard
Baltimore
Maryland
21230
tammy.roberson@maryland.gov
US
410-537-3522
Tammy K. Roberson
Chief, Tidal Wetlands Division
Esri ArcGIS 13.1.2.41833
1
-76.713789
-75.756006
39.237127
38.115177
Topology has been checked. There are no overlapping arcs. All arcs are greater than 1m in length.
All shoreline has a recommended shoreline practice listed in the MSSM_Classification_Final (MSSMClsF) field and a definition listed in the MSSM_Classification_Final_Definition (MSSMClsDef) field. Note that data feeding this model may have different publication dates and may not reflect the actual condition present on or near the shoreline.
Fetch data is an unpublished data source created by the Comprehensive Coastal Inventory, Center for Coastal Resources Management at the Virginia Institute of Marine Science, Gloucester Point, Virginia. This dataset provides information on shoreline exposure to potential wave energy via a distance model that measures distance to nearest shoreline along compass rose. Measurements are taken at 25 meter increments along the shoreline.
Anne Arundel County, Maryland - Shoreline Fetch
vector digital data
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
PO Box 1346
Gloucester Point
Virginia
23062
US
1375 Greate Road
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
2020-07-31T00:00:00
Maryland Tidal Shoreline Fetch
The Maryland Shoreline Inventory is produced county by county by the Center for Coastal Resources Management at the Virginia Institute of Marine Science, Gloucester Point, Virginia. The inventory provides information on bank height, marsh presence, beach presence, riparian land cover, and public boat ramps in addition to the location of shoreline structures such as riprap and bulkhead. The shoreline used to create the Maryland shoreline inventory is used as the base shoreline for the Shoreline Stabilization Model
Anne Arundel County, Maryland Shoreline Inventory
vector digital data
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
PO Box 1346
Gloucester Point
Virginia
23062
US
1375 Greate Road
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
Center for Coastal Resources Management, Virginia Institute of Marine Science (VIMS)
2020-06-08T00:00:00
2020-11-27T00:00:00
2023-08-15T00:00:00
https://scholarworks.wm.edu/data/431/
Maryland Shoreline Inventory 2020-2023
The most recent 5 years of SAV merged together to show SAV presence. This layer is unpublished. SAV data can be downloaded from the VIMS website http://web.vims.edu/bio/sav/gis_data.html
SAV Habitat 5 Years (2015-2019)
https://www.vims.edu/research/units/programs/sav/reports/index.php
Time period of SAV data.
2014-05-20T00:00:00
2018-10-01T00:00:00
Maryland's Six Inch Imagery is used to locate permanent structures, confirm road location, and identify wide beaches.
MD_SixInchImagery
Maryland Six Inch Imagery
Six Inch resolution aerial imagery for the State of Maryland. Depending upon when a locatlity was processed, imagery referenced was either flown in 2016 or 2019 for the Eastern Shore, or 2017 or 2020 for the Western Shore.
https://geodata.md.gov/imap/rest/services/Imagery/MD_SixInchImagery/MapServer
State of Maryland imagery was flown in 2016 (Eastern Shore) and 2017 (Western Shore).
2016-05-01T00:00:00
2017-10-01T00:00:00
Roads are obtained from the U.S. Department of Commerce, U.S. Census Bureau, Geography Division. TIGER/Line Shapefile, 2019, Series Information for the All Roads County-based Shapefile for each locality processed is used. This dataset provides the location of roads and rails near the shoreline.
TIGER/Line Shapefile, {2019}, county, {Anne Arundel}, MD, All Lines County-based Shapefile
2019-06-01T00:00:00
vector digital data
https://www.census.gov/geo/maps-data/data/tiger-line.html
tl_2019_24003_rds
VIMS-CCRM Coastal Management Decision Tools created by the Center for Coastal Resources Management (CCRM), Virginia Institute of Marine Science, Gloucester Point, Virginia provides the framework for the GIS Shoreline Management Model. Online Linkage: https://www.vims.edu/ccrm/advisory/ccrmp/bmp/index.php
Shoreline Best Management Practices
https://www.vims.edu/ccrm/advisory/ccrmp/bmp/index.php
The USGS Seamless Topobathymetric Elevation Model for the Chesapeake Bay (2016) is used for bathymetry. The datasets provide the 1 meter bathymetric contour to delineate shallow water.
USGS CoNED Topobathymetric Model (1859 - 2015)
2016-05-02T00:00:00
https://www.fisheries.noaa.gov/inport/item/55321
A variety of data sets are compiled onto a polyline base shoreline. These attributes are used to determine the shoreline best management practice for erosion control.
Channel data was obtained from the U.S Army Corps of Engineers (USACE) Geospatial website's National Channel Framework (NCF) database. Navigation channels are maintained by USACE. Channels within Maryland were extracted from the entire dataset.
Channel Reach
Channel data was downloaded Feb 15, 2021.
https://geospatial-usace.opendata.arcgis.com/datasets/9227967a2748410983352b501c0c7b39_2
The RTE layer was provided as a restricted distribution for use only with the Maryland Living Shoreline Suitability Model. Data was obtained from the Maryland Department of Natural Resources, Wildlife and Heritage Services.
MDDNR_OtherRTE_MDE_LShoreTool
Tiger Beetle Habitat layer was provided as a restricted distribution for use only with the Maryland Living Shoreline Suitability Model. Data was obtained from the U.S. Fish and Wildlife Service, Chesapeake Bay Field Office; Maryland Department of Natural Resources, Wildlife and Heritage Service.
MDDNR_TBeetle_MDE_LShoreTool
Fetch is determined by creating 16 arcs based on the compass rose, radiating from points evenly spaced every 25 meters along the shoreline. The average arc length over water is calculated for the NE, SE, SW, and NW quadrants. The quadrant with the longest average fetch distance determines the fetch for the associated shoreline arc segment. Fetch is classified as low = 0-0.5 mile, moderate = 0.5-2 miles, and high = > 2 miles.
2020-07-31T00:00:00
All processing steps occur in ArcMap, ArcGIS version 10.6. or ArcPro version2.9 and 3.0. Models and Python scripts have been created for use with each step, however after each model run, a manual check of the results is necessary for accuracy. The Maryland Shoreline Inventory coded shoreline serves as the base shoreline and contains information on bank height, presence of beach, presence of marsh, presence of sand spits, and riparian land cover. All other data layer information is added to this shoreline. Shoreline is delineated along the water edge. The one meter bathymetric contour is used to determine if the nearshore is suitable for marsh planting. If the 1 meter bathymetric contour is within 10 meters of the shoreline then the bathymetry field is coded as 'deep', otherwise it is coded as 'shallow'. Processing date: 2020-2023.
2020-09-24T00:00:00
The shoreline must be visually scanned to determine if there are any man-made navigable canals. If there are, the corresponding shoreline is coded canal = 'Canal'. Sand spits are noted in the shoreline inventory. If a sand spit is present, then sandspit = 'Yes'.
2020-09-25T00:00:00
All linear shoreline structures (except jetty) from the Maryland Shoreline Inventory are added to the base shoreline. Offshore structures (groin, breakwater, marsh toe revetment) are listed under the field "offshorest". All other structures are listed under "Structures". If a marina is listed in the Structures field, then any shoreline protection structures (mainly bulkhead and riprap) are coded in the "mrnaStruc" field. Processing dates: 2020-2023.
2020-09-29T00:00:00
To add roads and permanent structures (physical structures near the shoreline that would prohibit bank grading), the shoreline is buffered based on 3 times the maximum height in the bank height category plus 20 feet. Tiger roads and rails are buffered according to road/rail type. The general rule is one lane = 12 ft and shoulder = 12 ft, rail lines = 30 ft, bike paths/walkways = 8 ft, vehicular trails = 12 ft with no shoulder. Where transportation buffers and shoreline buffers intersect, shoreline should be coded for roads. Imagery along the shoreline is inspected for any permanent structures (houses, swimming pools, sheds, etc) that are within the shoreline buffer. Shoreline is coded for permanent structures when encountered.
2020-10-01T00:00:00
A tributary designation is assigned to the shoreline. Shoreline on the main stem of rivers is coded as major tributary, while small creeks are coded as tidal creek.
2020-10-14T00:00:00
Buffered Tiger Beetle Habitat and Rare, Threatened, and Endangered (RTE) species habitat layers are used to "flag" locations along the shoreline for Ecological Considerations. Federal Channels were buffered 150 feet. Shoreline intersecting the buffer or within 30 feet of the channel buffer are flagged as Highly Modified Areas.
2021-02-17T00:00:00
The most recent 5 years of SAV data was combined to create an SAV "habitat" layer. Only SAV polygons with density greater than zero were coded as "sav". The polygons were dissolved on the "sav" field to create a general sav habitat layer. The shoreline is coded for SAV presence if SAV is within 30 ft of the shoreline.
2021-05-28T00:00:00
The shoreline is given one last check for missing coding, errors, etc. Arcs less than or equal to 1m are dissolved into the larger adjacent arc. Topology is check for dangles and overlaps, and corrections made. Maryland Shoreline Stabilization Model (SSM) is run and the shoreline is coded with treatment recommendations. The SSM model queries a variety of spatial data and presents the preferred approach for erosion control. General preferred shoreline best management practices are recommended for all stretches of shoreline. Land use, bank height, marsh presence, fetch, beach presence, SAV, nearshore water depth, and existing structures feed into the resulting recommendations. Processing dates: 2020-2023
2021-06-25T00:00:00
The shoreline stabilization model outputs for Anne Arundel, Baltimore City, Baltimore County, Calvert, Caroline, Cecil, Charles, Dorchester , Harford, Kent, Prince George, Queen Annes, St. Marys , Somerset, Talbot, Wicomico, and Worcester Counties where merged together.
2023-08-14T00:00:00
Maryland_SSM_2020_2023_Final_wm
Maryland Shoreline Stabilization Model attributes
Processor
Feature Class
0
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
rd_pstruc
road or permanent structure is present within the shoreline buffer
Shoreline Management Model, Center for Coastal Resources Management, VIMS
yes
road or permanent structure is present within the shoreline buffer
Shoreline Management Model, Center for Coastal Resources Management, VIMS
no
road or permanent structure was not observed within the shoreline buffer
Shoreline Management Model, Center for Coastal Resources Management, VIMS
a road or permanent structure is present (yes) within a certain distance of the shoreline
rd_pstruc
String
4
0
0
Structure
erosion control structure: riprap, bulkhead, unconventional, etc
Maryland Shoreline Inventory
Riprap
Revetments are sloped structural shoreline stabilization measures comprised of stone, broken concrete, or other similar material. Revetments are typically parallel to the shoreline and designed to prevent erosion and stabilize an embankment. Riprap is also used next to failing bulkheads (bulkhead toe revetments) to fortify the structure. Riprap is mapped as a linear feature along the shoreline. The inventory maps only riprap when this type of structure is co-located with bulkheads.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Marina < 50 slips
Marinas are denoted as line features in the shoreline inventory. The infrastructure associated with the marina (e.g. bulkheading, docks, wharfs, etc) are not digitized individually. The survey estimates the number of slips within the marina and classifies marinas as those with less than 50 slips and those with more than 50 slips.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Bulkhead
Bulkheads are structural shoreline stabilization measures comprised of a vertical retaining wall composed of wood, stone, concrete, plastic, steel, or other similar material that offer protection from wave attack. Bulkheads are vertical structures built slightly channelward of the problem area and backfilled with suitable fill material. They function like a retaining wall, as they are placed parallel to the shoreline and are designed to retain upland soil, and prevent erosion of the bank from impinging waves.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Debris
Debris represents nonconforming materials and rubble dumped along the shoreline as shoreline protection. Debris can include tires, bricks, broken concrete rubble, and railroad ties as examples.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Marina > 50 slips
Marinas are denoted as line features in the shoreline inventory. The infrastructure associated with the marina (e.g. bulkheading, docks, wharfs, etc) are not digitized individually. The survey estimates the number of slips within the marina and classifies marinas as those with less than 50 slips and those with more than 50 slips.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Unconventional
Unconventional features represent segments along the shore where alternative material has been deliberately placed for shoreline protection. Unconventional features may include unique materials placed in a similar manner as riprap or bulkheads, such as engineered pre-cast concrete products. It may also include unique placement or arrangement of conventional materials like riprap that does not fit other structure definitions. Moreover, segments along the shoreline are coded unconventional when nonconforming materials and rubble are dumped along the shoreline in a haphazard manner with the purpose of stabilizing the shoreline (e.g., tires, bricks, broken concrete rubble, and railroad ties).
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Wharf
Typically describes a shore parallel structure where boats are tied. In this inventory, Wharf is generally associated with large industrial, public or commercial facilities.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Not observed
Shoreline protection structure not observed.
processor
list of shoreline protection structures that occur on the shoreline
Structure
String
50
0
0
marsh_all
Tidal Marsh that is found along coasts and estuaries of which the flooding characteristics are determined by the tidal movement of the adjacent estuary, sea or ocean and dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
no
no marsh present
Shoreline Management Model, Center for Coastal Resources Management, VIMS
marsh present
marsh is present
Shoreline Management Model, Center for Coastal Resources Management, VIMS
values can be "marsh present" or "no".
marsh_all
String
50
0
0
Marsh
Marsh
String
50
0
0
Tidal Marsh that is found along coasts and estuaries of which the flooding characteristics are determined by the tidal movement of the adjacent estuary, sea or ocean and dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
No
no marsh present
Shoreline Management Model, Center for Coastal Resources Management, VIMS
Marsh present
marsh is present
Shoreline Management Model, Center for Coastal Resources Management, VIMS
tribs
shoreline is classified as tidal creek, major tributary, or bay front.
Shoreline Management Model
major tributary
large stream or river that drains into an estuary like Chesapeake Bay or the Atlantic Ocean.
Shoreline Management Model, Center for Coastal Resources Management, VIMS
Tidal creek
small stream or river that is tidally influenced and drains into a major tributary, an estuary like Chesapeake Bay, or the Atlantic Ocean. A tidal creek has limited shoreline exposure to fetch > 2 miles.
Shoreline Management Model, Center for Coastal Resources Management, VIMS
shoreline is classified as being part of a tidal creek or a major tributary.
tribs
String
50
0
0
Tree_Fring
Tree Fringe: When the dominant riparian land use is not forested, but a line of trees is maintained along the bank edge, the land use is noted to include a tree fringe. When the tree fringe is between 100 and 500 feet, it is considered a wide tree fringe. When the tree fringe is greater than 500 feet, it would be labeled "forested" in land use.
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
Yes
Tree fringe is present
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
Yes W
Tree fringe is between 100 -500 feet
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
Forest
Tree fringe greater than 500 feet is considered forest.
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
No
A tree fringe is not present.
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
Tree_fring
String
50
0
0
ShlType
shoreline defended or undefended based on time of survey
author
Undefended
shoreline is not defended by a structure listed in the "Structures" or "offshorest" attributes.
Shoreline Management Model, Center for Coastal Resources Management, VIMS
Defended
Shoreline is protected by a structure listed in the "Structures" or "offshorest" attributes
Shoreline Management Model, Center for Coastal Resources Management, VIMS
shoreline is classified as defended or undefended
ShlType
String
25
0
0
WideBeach
A wide beach is a sandy beach with at least 10 feet of dry sand persistently visible above high tides.
Shoreline Management Model
wide beach is present (Yes) or absent (No).
WideBeach
String
6
0
0
canal
Navigable man-made excavated waterway.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Canal
man-made navigable canal is present
Shoreline Management Model, Center for Coastal Resources Management, VIMS
canal is present (Canal) or absent (No)
canal
String
10
0
0
Exposure
from the shoreline exposure model. Fetch is determined by creating 16 arcs based on the compass rose, radiating from points evenly spaced along the shoreline. The average arc length over water is calculated for the NE, SE, SW, and NW quadrants. The quadrant with the longest average fetch distance determines the fetch for the associated shoreline arc segment. Arcs were aggregated into 100 meter segments and the most common fetch classification is used.
Shoreline Management Model, Center for Coastal Resources Management, VIMS
Moderate
maximum average fetch is 0.5 - 2.0 miles
Shoreline Management Model
Low
maximum average fetch is 0 - 0.5 mile
Shoreline Management Model
High
maximum average fetch is > 2 miles
Shoreline Management Model
Fetch values are represented by low, moderate, or high.
Exposure
String
50
0
0
RiparianLU
Land Use refers to the predominant condition in the immediate riparian area within 100 feet of the adjacent shoreline. While the actual assessment of land use is defined by a distance, the classification can include best professional judgment; particularly when development or other land use activity is setback on the parcel.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Paved
Paved areas represent roads which run along the shore and generally are located at the top of the banks. Paved also includes parking areas such as parking at boat landing, or commercial facilities.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Residential
Residential land use includes single and multi-family dwellings
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Grass
Grasslands include large unmanaged fields, managed grasslands adjacent to large estates, agriculture tracts reserved for pasture, and grazing. While a general rule of thumb will classify a tract as “grass” if a home sits behind a large tract of grass, a designation of “residential” may be made if there are similar tracts adjacent to each other. This designation can be determined using best professional judgment.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Bare
Land use defined as bare includes areas void of any vegetation or obvious land use. Bare areas include those that have been cleared for construction.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Agriculture
Land use defined as agricultural includes farm tracts that are cultivated and crop producing. This designation is not applicable for pastureland.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Forested
Forest cover includes deciduous, evergreen, and mixed forest stands greater than 18 feet high. The riparian zone is classified as forested if the tree stand extends at least 30 feet inland of the seaward limit of the riparian zone. If the forest cover is less than 30 feet wide from the shoreline than some other primary land use designation is made.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Commercial
Commercial is a land use classification denoting small commercial operations such as shops, restaurants, as well as campgrounds. These operations are not necessarily water dependent businesses.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Industrial
Industrial operations are larger commercial businesses and can include areas where power plants, pulp mills, refineries, etc, are in operations along the coast.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Scrub-shrub
Scrub-shrub is a land use class that includes trees less than 18 feet high, and is usually dominated by shrubs and bushy plants.
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
current riparian land use: agriculture, bare, commercial, forested, grass, paved, residential, scrub-shrub, timbered
RiparianLU
String
255
0
0
PublicRamp
Paved Public Boat Ramp is present.
processor
PublicRamp
String
10
0
0
Values are "Yes" if present or "No" if absent.
bathymetry
Nearshore water depth. The location of the 1 meter (3.28 feet) bathymetric contour line determines the nearshore water depth. When the 1-meter bathymetric contour is greater than 10 meters (32.8 feet) offshore, nearshore depth is considered “Shallow”, otherwise it is classified as “Deep”. Water depth is used to determine if the nearshore is suitable for marsh planting.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Shallow
1 m bathymetric contour is greater than 10 m from shoreline
author
Deep
1 meter bathymetric contour is within 10 m of shoreline
author
water depth is classified as either deep or shallow for use in the model.
bathymetry
String
50
0
0
SAV
The presence of SAV is noted when SAV has been mapped within 30 feet of the shoreline at least once in the 5-year period (2015 – 2019).
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
SAV
String
255
0
0
SAV present (within 30 feet of shoreline) = Yes
SAV absent (within 30 feet of shoreline) = No
SandSpit
A narrow coastal landform tied to the upland shoreline at one end resulting from the deposition of sand moved by tides and currents. Spit features are generally sandy and may be dominated by beach, dune, and/or marsh habitats. For inventory purposes, this definition does not include spit features that are developed or have developable upland.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Sandspit is present ("Yes") or absent ("No").
SandSpit
String
10
0
0
BEACH
Beaches are persistent sandy shores that are visible during high tides. These features can be wide or thin lenses of sand. Beaches are coded as linear features at the wet/dry line to portray their location only. If a beach does not have a visible wet/dry line, then the line feature is located at the channelward edge of the beach. Beach features coded along tidal marsh shorelines are persistent, sandy features located on the water side of tidal marsh vegetation. Sand washed into tidal marshes is not coded as a beach if the marsh vegetation &/or marsh edge is still clearly visible. This classification of beaches along tidal marsh shorelines can include professional judgment.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Yes
beach is present
Shoreline Inventory definition, Center for Coastal Resources Management, VIMS
No
beach is not present
Shoreline Inventory definition, Center for Coastal Resources Management, VIMS
beach is either present (Yes) or absent (No)
Beach
String
50
0
0
roads
Roads located close to the shoreline can impede bank grading that may be needed to install a shoreline protection feature. Roads include paved roadways, and parking lots.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
roads are present (roads) or absent (No)
roads
String
6
0
0
PermStruc
Permanent structures located close to the shoreline can impede bank grading that may be needed to install a shoreline protection feature. Permanent structures are upland structures such as houses, swimming pools, or power stanchions.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Permanent Structure
permanent structures (houses, swimming pools, etc) are within the shoreline buffer
Shoreline Management Model, Center for Coastal Resources Management, VIMS
permanent structures (permanent structure) are present or absent ("Not observed")
permstruc
String
50
0
0
bnk_height
Bank height is the height of the bank from the base to the top. Height is estimated from imagery, field inspection, videography, LIDAR or a combination of all data sources. Bank height categories are low = 0-5 feet, 5-30 feet, and >30 feet.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
bank height: 0-5, 5-30, or >30
bnk_height
String
8
0
0
lowBnkStrc
lowBankAndPermStruc
String
255
0
0
Shoreline has a low or moderate bank height (0-5 ft) or (5-30 ft) and there is a road or permanent structure present that might impede bank grading.
processor
Values are "Yes" if conditions are met, otherwise it is "No".
Shape
Feature geometry.
ESRI
Coordinates defining the features.
Shape
Geometry
0
0
0
FedChannel
FederalChannel
String
255
0
0
Navigation channels are maintained by the U.S Army Corps of Engineers (USACE). Shorelines within a 150-foot buffer of a Federally maintained navigation channel are flagged for special consideration in the LSSM.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Federal Channel nearby
Shoreline is intersected by a150 ft buffer around a Federal Channel
processor
No
Federal navigation channel is not nearby.
processor
offshorest
offshore erosion control structure: breakwater, groins, marsh toe revetment.
author
Groins
Groins are structures that sit perpendicular to the shore and are designed to trap sand and reduce erosion. They can be constructed of rock, timber, vinyl, steel, concrete, or other similar material. They are frequently set in a series known as a groinfield, which may extend along a stretch of shoreline for some distance. Unless only a single groin can be detected, this inventory does not delineate individual groins in a groinfield. The groinfield is mapped as one linear feature parallel to the shoreline running along the length of the groin series. When effective, groins will trap sediment moving alongshore.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Marsh Toe
A continuous low-profile breakwater structure placed offshore from an existing marsh or new planted marsh. The structure may include tidal openings to allow for the easy exchange of free-swimming organisms during tidal cycles. Sills are mapped as offshore linear features running along the length of the shoreline. (aka Low Profile Sill, Marsh Sill, or Marsh Toe Revetment)
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
Breakwater
Breakwaters are structures that sit offshore and generally occur in a parallel series along the shore. Some breakwaters are attached to the land and are referred to as headland breakwaters. Their purpose is to attenuate and deflect incoming wave energy, protecting the area behind and between the structures. The Shoreline Inventory does not map individual breakwaters. A breakwater “system” is delineated and depicted as a line parallel to the series of breakwaters. The classification can include best professional judgement.
Glossary of Shoreline Feature Reference Layers for Maryland Living Shoreline Suitability Model (LSSM), Center for Coastal Resources Management, VIMS
list of shoreline protection structures that commonly extend into the water.
offshorest
String
25
0
0
defended
defended
String
20
0
0
Shoreline has an erosion control structure in place.
processor
Yes
An erosion control structure is present
processor
No
Shoreline is not defended (i.e. no erosion control structure is present)
processor
StrucList
StrucList
String
100
0
0
list of shoreline structures present (includes structures on shore and offshore)
processor
combines the structures listed in the "Structure","offshorest", and "mrnaStruc" fields into one attribute list
SpecialArea
SpecialConsideration
String
250
0
0
Areas of special consideration that may require advice from regulatory agencies and expert due to ecological or highly modified conditions.
processor
Ecological Consideration
Management options for this shoreline may be limited by the presence of Submerged Aquatic Vegetation (SAV), Rare, Threatened, or Endangered (RTE) species/habitat. Seek advice from the Tidal Wetlands Division of MDE.
Maryland Living Shoreline Suitability Model - Recommended Shoreline Best Management Practices Glossary
Highly Modified Area
Management options for this shoreline may be limited due to the presence of Federal navigation channels, highly developed upland (e.g. commercial wharfs), channel modifications (e.g. canals) or infrastructure directly adjacent to the shoreline (e.g. road). Seek expert advice on the design of your project.
Maryland Living Shoreline Suitability Model - Recommended Shoreline Best Management Practices Glossary
Land Use Management
This shoreline has unique features and shoreline management considerations. Forces other than tidal erosion, such as over-land runoff, upland development, and vegetation management are likely also having an effect on bank conditions. Assessment of all factors and modifications to address causes for bank erosion are recommended. Seek advice from the Tidal Wetlands Division of MDE. May require consultation with multiple agencies.
Maryland Living Shoreline Suitability Model - Recommended Shoreline Best Management Practices Glossary
Special Geomorphic Feature
Maintain the natural condition of this shoreline to allow for unimpeded sediment movement and the corresponding response of wetlands, beach and/or dune. If primary structures are present and threatened, seek expert advice on the design of your project.
Maryland Living Shoreline Suitability Model - Recommended Shoreline Best Management Practices Glossary
DefDate
Definition Date
String
50
0
0
Date of the definition creation or revision.
processor
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
SpecCount
SpecialAreaCount
Integer
4
0
0
Special Area count tallies the number of times a section of shoreline is flagged for a special area designation.
processor
HMACount
HighModAreaCount
Integer
4
0
0
Highly Modified Area Count tallies the number of times a section of shoreline is flagged for as a Highly Modified Area.
processor
HMAType
HMAType
String
150
0
0
Highly Modified Area Type lists each cause that triggers the Highly Modified Area designation.
processor
EcoCount
EcologicalConflictCount
Integer
4
0
0
Ecological Conflict Count tallies the number of times a section of shoreline is flagged for an Ecological Conflict.
processor
LUMCount
LUManagemntCount
Integer
4
0
0
Land Use Management Count tallies the number of times a section of shoreline is flagged for Land Use Management. Values should be 0 or 1.
processor
LUMType
LUMType
String
255
0
0
Landuse Management Type lists each cause that triggers the Land Use Management designation. List values should be "none" or "Land Use Management - high bank".
processor
SpitCount
SandSpitCount
Integer
4
0
0
Sand Spit Count tallies the number of times a section of shoreline is flagged as a Special Geomorphic Area. Values should be 0 or 1.
processor
SpitType
SandSpitType
String
255
0
0
Sand Spit Type lists each cause that triggers the Special Geomorphic Area designation. List values should be "none" or "Special Geomorphic Feature - Sandspit".
processor
County
County
String
255
0
0
Maryland County name
processor
StrucState
ObservedShorelineStructureStatement
String
200
0
0
A sentence about whether or not the shoreline was observed to have an erosion control structure present. This field can be used in the popup in a web app.
processor
SenSpecies
SensitiveSpecies
String
255
0
0
Sensitive species buffer area overlaps shoreline.
processor
mdeLink
mdeLink
String
255
0
0
url to Maryland Department of the Environment Wetlands and Waterways Program Directory. This link provides users with a way to contact experts for information about potential special consideration areas (ecological conflicts, highly modified areas, etc) that could impact a shoreline erosion control project.
processor
SpecAreaCopy
SpecialConsiderationAreaCopy
String
255
0
0
This field is a copy of the SpecialConsiderations field. Some attribute names have been shortened. This field is used for display and popup information.
processor
MSSMClsF
MSSM_Classification_Final
String
600
0
0
Maryland Shoreline Stabilization final recommendations.
Maryland Shoreline Stabilization Mapper (MSSM) - Recommended Shoreline Practices Glossary, 2021
Living Shoreline
Installation of an approach that uses plants and sand, rock, oyster shell, or other natural materials to protect shoreline and to create, maintain, and enhance habitat may be appropriate where a structural shoreline stabilization measure is not present or is non-functional.
Maryland Shoreline Stabilization Mapper (MSSM) - Recommended Shoreline Practices Glossary, 2022
Undetermined
In order to make an appropriate shore erosion control measure determination the property owner should coordinate a pre-application site visit with an MDE Project Manager assigned to the territory and complete a Living Shoreline Waiver request form.
Maryland Shoreline Stabilization Mapper (MSSM) - Recommended Shoreline Practices Glossary, 2022
Structural Shoreline Stabilization Measure
A predetermined decision by MDE that a person is not required to construct a living shoreline but can construct an erosion control measure that uses devices to armor and stabilize an area landward of the measure from further erosion. The measure may include the use of a bulkhead, revetment, groin, breakwater, jetty, sand, beach nourishment, and any other similar structure.
Maryland Shoreline Stabilization Mapper (MSSM) - Recommended Shoreline Practices Glossary, 2022
MSSMClsDef
MSSM_Classification_Final_Definition
String
5100
0
0
Definitions for the MSSM_Classification_Final field. Please see MSSMClsF attribute for list of categories and definitions
processor
id
id
Integer
4
0
0
mrnastruc
mrnastruc
String
50
0
0
Marina Structure = A structure that is associated with the marina that is present, usually bulkhead or riprap.
VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management
SpecConDef
SpecialConsiderationDefinition
String
5100
0
0
Definitions for Areas of Special Consideration. Please see MSSMClass attribute for list of categories and definitions. Special Consideration Categories: Ecological Considerations, Highly Modified Area, Land Use Management, and Special Geomorphic Area.
processor
File Geodatabase Feature Class
dataset
EPSG
6.18.3(9.3.1.2)
0
Simple
FALSE
0
TRUE
FALSE
20230816