Parent Layer: Maximum Water Building Footprints

Name: dealIslandBuildingFootprints_2030_msl_10%AnnualChanceFlood

Display Field: BLD_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The layer supports Maryland Department of Natural Resources (MDDNR) leadership and planners as they endeavor to mitigate or prevent the impacts of sea level change resulting from land surface subsidence and rising sea levels. The product uses sea-level projections to forecast maximum stillwater elevations and first floor flooding inside building footprints of Somerset County's for a given scenario.Methodology:US Army Corps of Engineers (USACE) provide the sea level change (SLC) estimate-1. SLC is localized using water elevations collected from a qualifying-2 National Oceanic and Atmospheric Administration (NOAA) tidal reference station - NOAA observations are transformed from tidal datum to North American Vertical Datum of 1988 (NAVD88). A final correction for glacial isostatic adjustment and land subsidence is applied to create an SLC value for the official project year, 2015.Forecast Sea Level Change:Year; Tide: SLC Value; Tide: SLC Value2015; MSL: 0; MHHW: 1.022020; MSL: 0.52; MHHW: 1.542030; MSL: 0.88; MHHW: 1.902040; MSL: 1.31; MHHW: 2.332050; MSL: 1.82; MHHW: 2.84The best available LiDAR, at time of creation, contributes to a county-wide Digital Elevation Model (DEM). The LiDAR-derived DEM is the base from which the SLC value is applied.The SLC adjusted DEM serves as elevation data for a Level 1 Coastal Only HAZUS-MH (FEMA) Flood analysis. The shoreline of the county level study is limited to Deal Island Neck. Breakpoints segment the shorline to capture flooding sources, locations, and heights outlined in the FEMA Flood Insurance Study for Somerset County, Maryland - #24039CV000A; Effective: March 03, 2011.Expected Flood Values:Flooding Source; Location; Annual Chance Event: Eleveation (ft) NAVD88Chesapeake Bay; Drum Point; 10%: 3.3, 4%: 3.675, 2%: 4.3, 1%: 4.7, 0.2%: 5.7Chesapeake Bay; Twiggs Point, Deal Island; 10%: 3.3, 4%: 3.712, 2%: 4.4, 1%: 4.8, 0.2%: 5.8Chesapeake Bay; Deal Point, Deal Island; 10%: 3.4, 4%: 3.812, 2%: 4.5, 1%: 4.9, 0.2%: 5.9Chesapeake Bay; Chance; 10%: 3.4, 4%: 3.85, 2%: 4.6, 1%: 5.0, 0.2%: 6.0Damage Curve assignment:First Floor Flood Depth; Building Damage %; Contents Damage %FFFDepth < -1, then BuildingDamage% = 0; ContentsDamage% = 0FFFDepth >= -1 and FFFDepth < 0, then BuildingDamage% = 18 + 18 * FFFDepth; ContentsDamage% = 12 + 12 * FFFDepthFFFDepth >= 0 and FFFDepth < 1, then BuildingDamage% = 18 + 4 * FFFDepth; ContentsDamage% = 12 + 13 * FFFDepthFFFDepth >= 1 and FFFDepth < 2, then BuildingDamage% = 19 + 3 * FFFDepth; ContentsDamage% = 15 + 10 * FFFDepthFFFDepth >= 2 and FFFDepth < 3, then BuildingDamage% = 19 + 3 * FFFDepth; ContentsDamage% = 33 + 1 * FFFDepthFFFDepth >= 3 and FFFDepth < 4, then BuildingDamage% = 22 + 2 * FFFDepth; ContentsDamage% = 30 + 2 * FFFDepthFFFDepth >= 4, then BuildingDamage% = 26 + 1 * FFFDepth; ContentsDamage% = 26 + 3 * FFFDepth-1 The SLC rate used in this study was calculated using the USACE High Curve. See http://www.corpsclimate.us/ccaceslcurves.cfmfor more detail.-2 Closest station with historic records of 40 years or greater. An average or qualifying stations was chosen when the nearest station’s records were insufficient.

Copyright Text: Maryland Department of Natural Resources (MDDNR), Eastern Shore Regional GIS Cooperative (ESRGC), National Oceanic and Atmospheric Administration (NOAA), United States Army Corps of Engineers (USACE), United States Geoglogical Survey (USGS). The 2006 building footprints from which this dataset is built was provided by Somersest County (originator: Spatial Systems Associates, Inc.)

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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: 491264.9979000017
YMin: 51666.149099998176
XMax: 505081.00720000267
YMax: 60150.2789000012
Spatial Reference: 26985  (26985)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: Dmg_Cat
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
Style: esriSFSSolid
Color: [26, 150, 65, 255]
Outline:
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Color: [110, 110, 110, 255]
Width: 0
Default Label: No Flooding Observed
UniqueValueInfos:
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  Outline:
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  Outline:
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  Width: 0
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
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

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• Bldg_Dmg_Dollar ( type: esriFieldTypeDouble, alias: BldgDamageDollar )
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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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