Name: Anne Arundel 10 years Shoreline Erosion Level

Display Field: DSAS_DATE

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: To quantify shoreline rates of change (erosion or accretion), Maryland Geological Survey (MGS) used historical and recent shorelines spanning 1993-2010 as input into the Digital Shoreline Analysis System (DSAS) Version 4.3. DSAS, a computer program developed by the U.S. Geological Survey (USGS), determines linear rates of shoreline change along closely spaced, shore-normal transects. Based on DSAS output, MGS assigned generalized rate of change categories as attributes to a recent shoreline for Anne Arundel County. This recent shoreline consisted of the National Oceanic and Atmospheric Administration (NOAA) Continually Updated Shoreline Product (CUSP) digital shoreline currently available for Anne Arundel County; and 2) portions of the Maryland Department of Natural Resources (MD DNR) Critical Area Commission (CAC) digital shoreline for Anne Arundel County. Based on the results of an End Point Rate (EPR) analysis on the ca. 1990s shoreline and the ca. 2000/2010 shoreline (recent shoreline), MGS grouped the rate results into the following general categories: (a) No change (-0.01 to 0.01 feet/year), (b) Accretion (greater than 0.01 feet/year), (c) Slight erosion rate (0 to -2 feet/year), (d) Low erosion rate (-2 to -4 feet/year), (e) Moderate erosion rate (-4 to -8 ft/yr), (f) High erosion rate (greater than -8 feet/year), (g) Protected, (h) No data (insufficient shorelines to calculate 10-year EPR rate), (i) No data (no transects cast; unprotected or unknown shoreline condition), and (j) No data (rates not delivered; calculated rates suspect). The NOAA CUSP shoreline represents the shoreline position in Anne Arundel County between the years 2005-2010. The CAC shoreline represents the shoreline position in Anne Arundel County in 2007. In Anne Arundel County, the NOAA CUSP data set covered all shoreline in the county with the exception of the Patuxent River along the western county border. As such, MGS utilized the CAC shoreline data set in the Patuxent River area. To identify which shoreline source is responsible for a shoreline segment, view the "DSAS_SRC" attribute table field -- "CAC" indicates a shoreline sourced from MD DNR CAC data set; "NOAA CUSP" indicates a shoreline sourced from the NOAA CUSP data set. Negative rate of change values indicate erosion, and positive values indicate accretion. In general, MGS tried to attribute lengths of shoreline of at least 80 meters in length sharing similar rates of change.

Copyright Text: MD iMAP, DNR

Default Visibility: true

MaxRecordCount: 65000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -8539732.9783
YMin: 4680604.971199997
XMax: -8504207.5082
YMax: 4755696.622199997
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: Erosion_Level
Field 2: null
Field 3: null
Field Delimiter: ,
Default Symbol:
N/A
Default Label: null
UniqueValueInfos:
• Value: No change
  Label: No change
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [0, 0, 0, 255]
  Width: 2
• Value: Accretion
  Label: Accretion
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [85, 255, 0, 255]
  Width: 2
• Value: Slight
  Label: Slight
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [255, 255, 0, 255]
  Width: 2
• Value: Low
  Label: Low
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [255, 170, 0, 255]
  Width: 2
• Value: Moderate
  Label: Moderate
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [255, 190, 190, 255]
  Width: 2
• Value: High
  Label: High
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [255, 0, 0, 255]
  Width: 2
• Value: Protected
  Label: Protected
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [156, 156, 156, 255]
  Width: 2
• Value: No data
  Label: No data
  Description:
  Symbol:
  Style: esriSLSSolid
  Color: [197, 0, 255, 255]
  Width: 2
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: GIS Object ID )
• DSAS_DATE ( type: esriFieldTypeString, alias: DSAS Date of Shoreline Segment, length: 10 )
• DSAS_UNC ( type: esriFieldTypeDouble, alias: DSAS Horizontal Positional Accuracy Uncertainty (m) )
• DSAS_SRC ( type: esriFieldTypeString, alias: DSAS Source Dataset, length: 10 )
• DSAS_DEC ( type: esriFieldTypeSmallInteger, alias: DSAS Decade Identifier )
• DSAS_CO ( type: esriFieldTypeString, alias: DSAS County, length: 25 )
• DSAS_NPROJ ( type: esriFieldTypeString, alias: DSAS NOAA Project, length: 10 )
• DSAS_SLINF ( type: esriFieldTypeString, alias: DSAS Shoreline Information, length: 25 )
• ATTRIBUTE ( type: esriFieldTypeString, alias: Attribute, length: 254 )
• DATA_SOURC ( type: esriFieldTypeString, alias: Data Source, length: 254 )
• EX_METH ( type: esriFieldTypeString, alias: Extraction Method, length: 254 )
• HOR_ACC ( type: esriFieldTypeString, alias: Horizontal Accuracy (m), length: 254 )
• INFORM ( type: esriFieldTypeString, alias: Additional Information, length: 254 )
• SOURCE_ID ( type: esriFieldTypeString, alias: Source ID, length: 254 )
• SRC_DATE ( type: esriFieldTypeString, alias: Date of Source Imagery, length: 254 )
• DAT_SET_CR ( type: esriFieldTypeString, alias: Data Set Credit, length: 254 )
• FIPS_ALPHA ( type: esriFieldTypeString, alias: FIPS State Alpha Code, length: 254 )
• NOAA_Regio ( type: esriFieldTypeString, alias: NOAA Region, length: 254 )
• SRC_CITA ( type: esriFieldTypeString, alias: Source Citation, length: 254 )
• SRC_RESOLU ( type: esriFieldTypeDouble, alias: Source Resolution )
• VER_DATE ( type: esriFieldTypeString, alias: Verification Date, length: 254 )
• Erosion_Level ( type: esriFieldTypeString, alias: Erosion Level, length: 50 )
• Erosion_ft ( type: esriFieldTypeString, alias: Erosion Feet, length: 100 )
• Notes ( type: esriFieldTypeString, alias: Notes, length: 100 )
• Level_ID ( type: esriFieldTypeString, alias: Level ID, length: 50 )
• ORIGIN ( type: esriFieldTypeString, alias: Origin, length: 10 )
• LINE ( type: esriFieldTypeString, alias: Line, length: 10 )
• Shape ( type: esriFieldTypeGeometry, alias: GIS Shape )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape.STLength() )

Supported Operations:   Query   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata