Name: Steep Slope >=11degrees (approx. 20%)

Display Field: Desc_

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: First, read the details of how MassGIS created their slope dataset. MassGIS 2021 LiDARBeginning with the MassGIS Slope raster (values in degrees) -- the MVC reclassified the data so values of greater than 90 were set to 0; all other original values retained. Next, Focal Statistics was calculated to generalize the data: Parameters - Neighborhood 9x9 cell (each cell was 0.5sq m) Mean calculated & did NOT ignore 'No Data' values.Then from the generalized slope raster, Extracted Attribute where slope was >= 11 degrees. Reclassified that raster output so all values set to = 1. Converted reclassed raster to polygon - specified 'simplify polygon' and did NOT create multi part polygons.Two attribute fields were added to the polygon feature class: Description and Region. Description value set to either 'Steep' where polygon size is >=0.125acrea (506sq m) or 'Noise' if otherwise. Region indicates Martha's Vineyard or Nomans Land or town of Gosnold.

Copyright Text: Original Slope Data - MassGIS/USGS 2021; Processed Steep Slopes - Martha's Vineyard Commission 2025

Min. Scale: 0

Max. Scale: 0

Default Visibility: false

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 255374.868799999
YMin: 783738.326299999
XMax: 287998.673199996
YMax: 803996.0447
Spatial Reference: 26986 (26986)

Drawing Info:

{"renderer":{"type":"simple","symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[168,0,132,255],"outline":{"type":"esriSLS","style":"esriSLSSolid","color":[110,110,110,255],"width":0.7}},"label":"weight 4"},"scaleSymbols":true,"transparency":0,"labelingInfo":null}

HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Name : OBJECTID

IsSystemMaintained : True

Global ID Field:

Type ID Field:

Fields:

• OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• Id (type: esriFieldTypeInteger, alias: Id, SQL Type: sqlTypeOther, nullable: true, editable: true)
• gridcode (type: esriFieldTypeInteger, alias: gridcode, SQL Type: sqlTypeOther, nullable: true, editable: true)
• Desc_ (type: esriFieldTypeString, alias: Description, SQL Type: sqlTypeOther, length: 30, nullable: true, editable: true)
• Region (type: esriFieldTypeString, alias: Region, SQL Type: sqlTypeOther, length: 30, nullable: true, editable: true)
• Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

Name: MassGIS 2021 Elevation >20% slope
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 2/11/2026 4:52:21 PM

Schema Last Edit Date: 2/11/2026 4:52:21 PM

Data Last Edit Date: 2/11/2026 4:52:21 PM

Supported Operations:   Query   Query Pivot   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates   ConvertFormat