Title
|
Shelf valley geomorphic feature layer |
Date
|
2013-06-05 |
Date type
|
Creation: Date identifies when the resource was brought into existence
|
Date
|
2014-02-14 |
Date type
|
Publication: Date identifies when the resource was issued
|
Edition
|
Version 1 |
Code
|
ed60b741-3109-42e4-85ed-477040ee88f2 |
|
Presentation form
|
Digital map: Map represented in raster or vector form
|
Abstract
|
The shelf valley geomorphic feature layer represents the spatial extent of the shelf valleys 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). Valleys incised more than 10 m into the continental shelf were digitised
by hand. To qualify for inclusion in this study, shelf valleys had to be greater than 10 km in length and >10 m in depth
overall. Only features that had a definite elongate shape were included as valleys, nominally more than 4 times greater
in length than width. Features that intersected the shelf break and extended both onto the shelf and down-slope (where they
become submarine canyons) were also included.
|
Purpose
|
The shelf valley geomorphic feature layer represents the spatial extent of the shelf valleys 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.
|
Credit
|
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)
|
|
Maintenance and update frequency
|
Irregular: Data is updated in intervals that are uneven in duration
|
Descriptive keywords
|
Geology (theme). |
Descriptive keywords
|
global (place). |
Descriptive keywords
|
seafloor, geomorphic features, habitats (theme). |
Descriptive keywords
|
Downloadable Data . |
Use limitation
|
The global seafloor geomorphic feature map is available for download from bluehabitats.org |
Access constraints
|
Other restrictions: Limitation not listed
|
Other constraints
|
no limitations |
Spatial representation type
|
Vector: Vector data is used to represent geographic data
|
Character set
|
UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
|
Topic category code
|
Oceans |
Environment description
|
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.4.4000 |
|
|