Name: Trenches

Display Field: geomorphic

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The </SPAN><SPAN>trench </SPAN><SPAN>geomorphic feature layer represents the spatial extent of the </SPAN><SPAN>trenches</SPAN><SPAN> of the worlds oceans based on interpretation of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic features map (Harris et.al. 2014). </SPAN><SPAN><SPAN>Trenches are “a long narrow, characteristically very deep and asymmetrical depression of the sea floor, with relatively steep sides”</SPAN></SPAN><SPAN><SPAN> (IHO, 2008)</SPAN></SPAN><SPAN><SPAN>. Trenches are generally distinguished from troughs by their “V”</SPAN></SPAN><SPAN><SPAN> shape in cross section (in contrast with flat-bottomed troughs). In this study trenches were mapped by selecting closed bathymetric contours that defined basins contained within the trench feature, and then joining the basin segments together by hand digitizing along more elevated sections. In this way, bridge features were also identified</SPAN></SPAN><SPAN><SPAN> (as coinciding with infilled sections of trenches; see section on “bridges”</SPAN></SPAN><SPAN><SPAN>). </SPAN></SPAN></P></DIV></DIV></DIV>

Service Item Id: ab9877e84b514604a5e20874622aa095

Copyright Text: The global seafloor geomorphic features map has been produced through a collaboration between Geoscience Australia, GRID-Arendal and Conservation International. Reference: Harris et. al. (2014) Geomorphology of the oceans.Marine Geology (in Press)

Default Visibility: true

MaxRecordCount: 1000

MaxSelectionCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -2.00375070672E7
YMin: -8640229.460900001
XMax: 2.0037507067199998E7
YMax: 7464717.378399998
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
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Color: [191, 252, 242, 255]
Outline:
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Width: 0
Label: N/A
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Labeling Info:

Feature Draw Order:

N/A

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
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Supports Pagination: true
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Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
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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: true
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: N/A

Fields:

• objectid ( nullable: false, alias: objectid, type: esriFieldTypeOID )
• geomorphic ( nullable: true, length: 20, alias: Geomorphic, type: esriFieldTypeString )
• area_km2 ( nullable: true, alias: area_km2, type: esriFieldTypeDouble )
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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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