Name: Sills

Display Field: sill_depth

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The </SPAN><SPAN>sill </SPAN><SPAN>geomorphic feature layer represents the spatial extent of the </SPAN><SPAN>sills</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>Sills are “</SPAN></SPAN><SPAN><SPAN>a sea floor barrier of relatively shallow depth re</SPAN></SPAN><SPAN><SPAN>stricting water movement between basins”</SPAN></SPAN><SPAN><SPAN> (IHO, 2008). Thus every basin has a sill, over which fluid would escape if the basin were filled to overflowing. The identification of sills in this study is based on selecting contours at a specified interval of 10 m (shelf except for Antarctica), 50 m (Antarctic shelf) or 100 m (all other areas) depending upon the location. Selecting the most shoal, closed contour defines the basin; one contour interval above this typically identifies a discrete location where c</SPAN></SPAN><SPAN><SPAN>ontours “escape”</SPAN></SPAN><SPAN> from the basin and join into the regional bathymetry. This location is mapped as the sill. Sills were mapped for all of the major ocean basins and seas and for the larger basins perched on the continental shelf; sills were not mapped for the smaller basins perched on the slope or shelf or for the smaller abyssal basins.</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: -1.9685810447E7
YMin: -1.37332323476E7
XMax: 1.98907529594E7
YMax: 2.74110046484E7
Spatial Reference: 102100  (3857)

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Labeling Info:

Feature Draw Order:

N/A

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
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Supports Query With Distance: true
Supports Sql Expression: true
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Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
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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 )
• sill_depth ( nullable: true, alias: Sill_Depth, type: esriFieldTypeSmallInteger )
• geomorphic ( nullable: true, length: 20, alias: Geomorphic, type: esriFieldTypeString )
• area_km2 ( nullable: true, alias: area_km2, type: esriFieldTypeDouble )
• shape ( nullable: true, alias: shape, type: esriFieldTypeGeometry )
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• 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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