Parent Layer: 1 : 50,000

Name: CoastlinePoly

Display Field: IslandName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Trinidad & Tobago Coastline 2016Digitization Procedures Rocky coastlines: Areas with rocky coastlines tend to not have a visible high water mark. In these areas the digitized coastline was done along the sharp boundary between the rocks and the water. Rocks covered by water in the image were not included. Digitization included rocky protrusions into the water. Smoothing of the coastline was not done once the details were visible from 1:400 scale and larger. Sandy Coastlines: Areas with sandy coastlines were digitized using the high water mark which is typically visible as the demarcation saturated and unsaturated sand. It was important to digitize this water mark and not the wave front as the latter could be receding or advancing at the moment the image was taken and not represent the true coastline. Islands:All land mass larger than 9,000 m2 within the territorial waters of Trinidad and Tobago were digitized. Image errors: In a few locations there are obvious image mosaic errors where the two neighbouring image tiles do line up. It was decided to not digitize the error but rather to estimate where the coastline would be using the neighbouring tiles as a guide. Sargassum:Several beaches, esp. along the eastern region of Tobago, had significant build-up of Sargassum seaweed which concealed the high water mark. In those instances, the upper boundary of the Sargassum was used as the demarcation for the high water mark.

Copyright Text: Imagery provided by Ministry of Agriculture Survey and Mapping Division

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 50000

Max Scale: 25001

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: false

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Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 617154.4045000002
YMin: 1110358.2380999997
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Spatial Reference: 32620  (32620)

Drawing Info:

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Labeling Info:

Advanced Query Capabilities:

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Supports OrderBy: true
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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: OBJECTID )
• EID ( type: esriFieldTypeInteger, alias: Unique ID )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
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• Edited_By ( type: esriFieldTypeString, alias: Edited_By, length: 255 )
• Edited_Date ( type: esriFieldTypeDate, alias: Edited_Date, length: 8 )
• IslandName ( type: esriFieldTypeString, alias: IslandName, length: 50 )
• SHAPE.STArea() ( type: esriFieldTypeDouble, alias: SHAPE.STArea() )
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Supported Operations:   Query   Generate Renderer   Return Updates

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