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WGS_1984_Web_Mercator_Auxiliary_Sphere
20211006
10134500
20211006
10134500
INSPIRE
Miles Macmillan-Lawler
GRID-Arendal
Miles.Macmillan-Lawler@grida.no
Rise geomorphic feature layer
vector digital data
2013-06-05T00:00:00
2014-02-14T00:00:00
Version 1
Miles Macmillan-Lawler
GRID-Arendal
Miles.Macmillan-Lawler@grida.no
Global Coverage
The rise geomorphic feature layer represents the spatial extent of the rises 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). The global seafloor geomorphic features map is intended to support ocean management including feature inventories, spatial planning and biodiversity conservation.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The </SPAN><SPAN>rise </SPAN><SPAN>geomorphic feature layer represents the spatial extent of the </SPAN><SPAN>rises</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>The continental rise was digitised by hand at a nominal spatial scale of 1:3,000,000 in ArcGIS based on 100 m contours. A map of global ocean sediment thickness (Divins, 2003) was used to assist with identifying potential rise areas. In general the rise was confined to areas of sediment thickness >300 m.</SPAN><SPAN> </SPAN><SPAN>Criteria for identification of continental rises included the occurrence of a smooth sloping seabed as indicated by evenly-spaced, slope-parallel contours (Curray et al., 2002; Dowdeswell et al., 2008; Covault et al., 2011</SPAN><SPAN><SPAN>). In this study, the term “Rise” was restricted to features that abut continental margins and does not include the mid-ocean ridge (or “rise”</SPAN></SPAN><SPAN><SPAN>), which was mapped as a separate feature. The GEBCO Gazetteer of geographic names of undersea features (IHO-IOC, 2012) was used to ensure all named features were included.</SPAN></SPAN></P></DIV></DIV></DIV>
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)
global
seafloor
geomorphology
geomorphic feature
rise
habitat
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The global seafloor geomorphic feature map is available for download from bluehabitats.org</SPAN></P></DIV></DIV></DIV>
seafloor, geomorphic features, habitats
global
Miles Macmillan-Lawler
GRID-Arendal
Miles.Macmillan-Lawler@grida.no
Esri ArcGIS 12.8.0.29751
1
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0
The polygons represent the boundaries for the continents of the world.
ESRI
objectid
objectid
OID
4
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Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
shape
Geometry
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ESRI
Coordinates defining the features.
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0
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area_km2
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st_area(shape)
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0
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st_length(shape)
st_length(shape)
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0
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Enterprise Geodatabase Feature Class
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dataset
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