Name: Marsh Migration Corridors (4ft sea level rise)

Display Field: ModelAgreement

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: There are four marsh migration models incorporated into this layer. NOAA generated raster data layers using three models (SLAMM, InVEST, NOAA). This raster showed where marsh migration was predicted to occur for a water level rise of four feet according to each of these three models. The Evolution of Tidal Marsh (ETM) marsh migration model which VIMS produced was then overlaid on top of this. The ETM rasters represent successive tidal ranges of two feet of elevation, incremented by 0.5 feet, i.e. 0-2 ft, 0.5-2.5 ft, 1-3 ft, etc.). From the ETM analysis, the tidal range layer was used which had a 4 foot water rise as a midpoint in the tidal range. The raster from ETM was overlaid on the raster from the NOAA analysis. Raster cells were classified by the number of models overlaid on a given cell. Cells overlaid by all four models were given a score of 4, cells overlaid by three models were given a score of 3, cells overlaid by two models were given a score of 2, and cells overlaid by one model were given a score of 1. This data layer was then clipped to locality boundarys. In this analysis, developed lands (Developed, Medium Intensity and Developed, High Intensity categories from the National Land Cover Dataset) were considered to be unsuitable for future marsh migration and were excluded from the final output.A series of post-processing steps were taken to eliminate stray isolated raster cells and the raster was converted to polygons. Only projected marsh migration polygons which intersected tidal marsh (CCRM Tidal Marsh Inventory) and nontidal wetlands (National Wetlands Inventory) adjacent to it were extracted for the final output. The polygons were processed through the Smooth Polygon tool in ArcGIS Pro to improve appearance while retaining spatial integrity.

Copyright Text: Marsh Migration Corridor Envelope for Maryland and Virginia (https://hub.arcgis.com/documents/ChesBay::marsh-migration-corridor-envelope-for-maryland-and-virginia/about, October 2023) Migration of the Tidal Marsh Range Under Sea Level Rise for Coastal Virginia, with Land Cover Data (https://scholarworks.wm.edu/data/444/, Mitchell and Herman, July 2021) https://www.vims.edu/ccrm/research/inventory/ https://www.fws.gov/program/national-wetlands-inventory

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: -8577963.0064
YMin: 4376599.436099999
XMax: -8445639.7683
YMax: 4618092.744500001
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: ModelAgreement
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
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Default Label: N/A
UniqueValueInfos:
• Value: Full Agreement (4/4 models)
  Label: Full Agreement (4/4 models)
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• Value: High Agreement (3/4 models)
  Label: High Agreement (3/4 models)
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• Value: Moderate Agreement (2/4 models)
  Label: Moderate Agreement (2/4 models)
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• Value: Low Agreement (1/4 models)
  Label: Low Agreement (1/4 models)
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Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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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
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: false
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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