Name: Seamounts

Display Field: geomorphic

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The </SPAN><SPAN>seamount </SPAN><SPAN>geomorphic feature layer represents the spatial extent of the </SPAN><SPAN>seamounts</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>Seamounts are “</SPAN></SPAN><SPAN><SPAN>a discrete (or group of) large isolated e</SPAN></SPAN><SPAN><SPAN>levation(s), greater than 1,000 m in relief above the sea floor, characteristically of conical form”</SPAN></SPAN><SPAN><SPAN> (IHO, 2008). Seamounts are thus defined as peaks that rise over 1,000 m above the seafloor, calculated based on the SRTM30_PLUS model. We adhered str</SPAN></SPAN><SPAN><SPAN>ictly to the requirement that seamounts are “of conical form”, thus distinguishing “seamounts”</SPAN></SPAN><SPAN><SPAN> (having a length/with ratio &lt;2) from ridges (having a length/wid</SPAN></SPAN><SPAN><SPAN>th ratio ≥</SPAN></SPAN><SPAN>2). The criterion of a length/with ratio &lt;2 for seamounts is consistent with the geomorphic analysis of Mitchell (2001). Seamounts are, furthermore, distinguished from flat-topped guyots</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: -1.3033370507100001E7
XMax: 2.0037507067199998E7
YMax: 1.3896138563199997E7
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSFSSolid
Color: [181, 181, 252, 255]
Outline:
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Color: [110, 110, 110, 255]
Width: 0
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:

Feature Draw Order:

N/A

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
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: 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: 16, alias: Geomorphic, type: esriFieldTypeString )
• area_km2 ( nullable: true, alias: area_km2, type: esriFieldTypeDouble )
• height ( nullable: true, alias: Height, type: esriFieldTypeInteger )
• peak_depth ( nullable: true, alias: Peak_Depth, type: esriFieldTypeInteger )
• seamountid ( nullable: true, length: 10, alias: SeamountID, type: esriFieldTypeString )
• shape ( nullable: true, alias: shape, type: esriFieldTypeGeometry )
• st_area(shape) ( nullable: true, alias: st_area(shape), type: esriFieldTypeDouble )
• st_length(shape) ( nullable: true, alias: st_length(shape), type: esriFieldTypeDouble )

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

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