TERN Geospatial Catalogue
Contributing Area - Multiple Flow Direction (Partial) derived from 1" SRTM DEM-H
CA_MFD_PARTIAL is contributing area in m2 computed using multiple flow directions on hillslopes and ANUDEM-derived flow directions in channels. The contributing area was computed on 1 degree tiles with 200 cell (about 5 km) overlaps so the areas in channels do not account for catchments beyond that size (hence the use of PARTIAL in the name). The primary purpose of this product was to calculate topographic wetness index (TWI; Gallant and Wilson, 2000) for which full contributing areas in channels are not necessary. Do not use this product to represent contributing areas of catchments larger than 5 km across.
The CA_MFD_PARTIAL product was derived from the Hydrologically enforced Digital Elevation Model (DEM-H; ANZCW0703014615), which was derived from the 1 arc-second resolution SRTM data acquired by NASA in February 2000.
This data is available in tiled format at 1 arc-second and 3 arc-second resolution.
The 3 arc-second resolution product was generated from the 1 arc-second CA_MFD (partial) product and masked by the 3” water and ocean mask datasets.
Simple
Identification info
- Date (Creation)
- 2016-06-03
- Date (Publication)
- 2016-06-03
- Date (Revision)
- 2016-06-03
- Edition
- v2
Publisher
Commonwealth Scientific and Industrial Research Organisation
26 Dick Perry Avenue, Kensington, Western Australia,
6151, Australia
Kensington
Western Australia
6151
Australia
Author
Commonwealth Scientific and Industrial Research Organisation - Gallant, John
Clunies Ross Street, Black Mountain, 2601, Australian Capital Territory, Australia
Black Mountain
Australian Capital Territory
2601
Australia
Author
Commonwealth Scientific and Industrial Research Organisation - Austin, Jenet
Clunies Ross Street, Black Mountain, 2601, Australian Capital Territory, Australia
Black Mountain
Australian Capital Territory
2601
Australia
Identifier
- Keywords (Discipline)
-
- Contributing Area
- LAND Topography Models
- ECOLOGY Landscape
- TERN_Soils
- Land Surface
- Australia
- ANZSRC Fields of Research
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2000-02-11 2000-02-22
Resource constraints
- Use limitation
- The Creative Commons Attribution 4.0 International (CC BY 4.0) license allows others to copy, distribute, display, and create derivative works provided that they credit the original source and any other nominated parties. Details are provided at https://creativecommons.org/licenses/by/4.0/
- File name
- 88x31.png
- File description
- CCBy Logo from creativecommons.org
- File type
- png
- Title
- Creative Commons Attribution 4.0 International Licence
- Alternate title
- CC-BY
- Edition
- 4.0
- Access constraints
- License
- Use constraints
- Other restrictions
- Other constraints
- Data is accessible online and may be reused in accordance with licence conditions
Resource constraints
- Classification
- Unclassified
- Credit
- All Rights (including copyright) CSIRO 2012.
Distribution Information
Distributor
Distributor
Commonwealth Scientific and Industrial Research Organisation
26 Dick Perry Avenue, Kensington, Western Australia,
6151, Australia
Kensington
Western Australia
6151
Australia
- Distribution format
-
- OnLine resource
- http://hdl.handle.net/102.100.100/9237?index=1
Resource lineage
- Statement
- Source data 1. 1 arc-second SRTM-derived Hydrologically Enforced Digital Elevation Model (DEM-H; ANZCW0703014615). 2. DEM-H Flow direction grid 3. 1 arc-second CA_MFD (partial) product 4. 3 arc-second resolution SRTM water body and ocean mask datasets CA_MFD_PARTIAL calculation CA_MFD_PARTIAL was calculated from DEM-H to provide the contributing area for the calculation of TWI, following the methods described in Gallant and Wilson (2000). It is derived from a slope-weighted multiple flow algorithm for flow accumulation, but uses the flow directions derived from the interpolation (ANUDEM) where they exist. In this case, they are the ANUDEM-derived flow directions only on the enforced stream lines, so the flow accumulation will follow the streams. The varying area of grid cells with latitude due to the geographic projection of the data was accounted for in the calculation of contributing area. The CA_MFD_PARTIAL calculation was performed on 1° x 1° tiles, with 200 cell (about 5 km) overlaps at tile edges. This overlap ensures that contributing area for channels with catchments up to 5 km across is correctly captured, but the area of larger catchments will not be included. This product is therefore not suitable for use where the contributing areas for larger catchments are needed. The primary purpose of this product was to support calculation of Topographic Wetness Index (TWI), which is designed to represent patterns on hillslopes and does not need full catchment contributing area in channels. A full contributing area product will be developed in the future. The 3 arc-second resolution version was generated from the 1 arc-second CA_MFD (partial) product. This was done by aggregating the 1” data over a 3 x 3 grid cell window and taking the maximum of the nine values that contributed to each 3” output grid cell. The 3” CA_MFD data were then masked using the SRTM 3” ocean and water body datasets. References Gallant, J.C. and Wilson, J.P. (2000) Primary topographic attributes, chapter 3 in Wilson, J.P. and Gallant, J.C. Terrain Analysis: Principles and Applications, John Wiley and Sons, New York.
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/EPSG:4326
- Reference system type
- Geodetic Geographic 2D
Metadata
- Metadata identifier
-
urn:uuid/3c9eb883-5e61-55d6-9b14-703da73499a7
- Title
- TERN GeoNetwork UUID - Commonwealth Scientific and Industrial Research Organisation
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/3c9eb883-5e61-55d6-9b14-703da73499a7
Point of truth URL of this metadata record
- Date info (Creation)
- 2016-06-07T13:05:40+10:00
Metadata standard
- Title
- ISO 19115-1:2014/AMD 1:2018 Geographic information - Metadata - Fundamentals
- Edition
- 1
Metadata standard
- Title
- ISO/TS 19115-3:2016
- Edition
- 1.0
Metadata standard
- Title
- ISO/TS 19157-2:2016
- Edition
- 1.0
- Title
- Terrestrial Ecosystem Research Network (TERN) Metadata Profile of ISO 19115-3:2016 and ISO 19157-2:2016
- Date (published)
- 2021
- Edition
- 1.0
Identifier
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available