Name: MV_Breaklines_CoastPond_ID

Display Field: B_LINE_TY

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Breaklines of ponds and shoreline from the LiDAR 2021 survey. The dataset includes the breaklines of Martha's Vineyard Island and Nomans Island. A breakline indicates where the LiDAR data indicated zero elevation (NAVD88 vertical datum). The breaklines are not tidally corrected. Hence, one can not say with certainty if a breakline represents MHW mean high water or some tidal variation thereof. The Martha's Vineyard Commission assigned an attribute to the breaklines to indicate if it was ocean coastline or a pond shoreline.

Copyright Text: Original LiDAR data & breaklines - NV5 2021; Martha's Vineyard Commission - 2025 minor attribute edits.

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 255347.152900003
YMin: 777943.694699999
XMax: 288101.361699998
YMax: 804046.846000001
Spatial Reference: 26986 (26986)

Drawing Info:

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HasZ: true

HasM: true

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: Coast_Pond

Fields:

• OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• B_LINE_TY (type: esriFieldTypeString, alias: B_LINE_TY, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
• Coast_Pond (type: esriFieldTypeString, alias: Coast_Pond, SQL Type: sqlTypeOther, length: 1, nullable: true, editable: true)
• Island (type: esriFieldTypeString, alias: Island, SQL Type: sqlTypeOther, length: 30, nullable: true, editable: true)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Types:

ID: C
Name: Coastline
Domains:

Templates:

Name: C
Description:
Drawing Tool: esriFeatureEditToolLine
Prototype:

Attributes:

• Coast_Pond: C

---

ID: P
Name: Pond Shoreline
Domains:

Templates:

Name: P
Description:
Drawing Tool: esriFeatureEditToolLine
Prototype:

Attributes:

• Coast_Pond: P

---

ID: N
Name: Other
Domains:

Templates:

Name: N
Description:
Drawing Tool: esriFeatureEditToolLine
Prototype:

Attributes:

• Coast_Pond: N

---

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 8/28/2026 4:37:18 PM

Schema Last Edit Date: 8/28/2026 4:37:18 PM

Data Last Edit Date: 8/28/2026 4:32:11 PM

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