Multi-resolution Ridge Top Flatness (MrRTF)

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About this Collection

Multi-resolution Ridge Top Flatness (MrRTF)

MrRTF is a topographic index designed to identify high flat areas at a range of scales. It complements the MrVBF index that is designed to identify areas of deposited material in flat valley bottoms. Unlike MrVBF, the MrRTF index does not have a clear link to landform processes but it has been found to be a useful adjunct to MrVBF in landform class... more

Environmental Management Land Capability and Soil Degradation Landscape Ecology Natural Resource Management Soil Sciences not elsewhere classified

11 Feb 2000

22 Feb 2000

CSIRO Enquiries
1300 363 400

MrRTF LAND Topography Models ECOLOGY Landscape TERN_Soils Land Surface Australia

Source data 1. The 1 arc-second SRTM DEM-S (ANZCW0703014016) 2. The 1 arc-second MrRTF product 3. 3 arc-second resolution SRTM water body and ocean mask datasets MrRTF calculation The MrRTF and MrVBF method is described in Gallant and Dowling (2003). It is based on slope and position in landscape (ranking within a 3- or 6-cell circular window) calculated from the original DEM and progressively generalised DEMs. The algorithm used to create this product is version 6g-a5, which is slightly different to that in the original paper. Each value of MrRTF is associated with a particular scale and slope threshold. For each successive value the slope threshold halves and the scale triples. At each scale a location is assigned the value for that scale if it is sufficiently high (ranked above the majority of the surrounding cells) and flat (slope less than the threshold), and zero otherwise. The largest value takes precedence at each location. Value Threshold Resolution slope (%) (approx) 0 30 m 1 16 30 2 8 30 3 4 90 4 2 270 5 1 800 6 0.5 2.4 km 7 0.25 7.2 km 8 0.125 22 km 9 0.0625 66 km The 3 arc-second version of MrRTF was derived from the 1 arc-second MrRTF using the median value in each 3 x 3 group of 1 arc-second cells. Gallant, J.C. and Dowling T.I. (2003) A multiresolution index of valley bottom flatness for mapping depositional areas. Water Resources Research 39(12) 1347-1360.

Access to this data has been made possible by the Terrestrial Ecosystem Research Network (TERN), supported by the Australian Government through the National Collaborative Research Infrastructure Strategy and the Super Science Initiative.

Creative Commons Attribution 4.0 International Licence

CSIRO (Australia)

Gallant, John; Dowling, Trevor; Austin, Jenet (2013): Multi-resolution Ridge Top Flatness (MrRTF). v2. CSIRO. Data Collection.

All Rights (including copyright) CSIRO 2013.

The metadata and files (if any) are available to the public.

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Location Details

10°0′0″ S

44°0′0″ S

154°0′0″ E

113°0′0″ E


More about this Collection

John Gallant

Terrain Analysis Research Team Leader

0 m

0 m





About this Project

1181.2 TERN Facility No9 InfoGrid GRUNDY

The Soil and Landscape Grid of Australia is a comprehensive fine spatial resolution grid of functional soil attributes and key landscape features across Australia. The landscape attributes are derived from the data collected by the Shuttle Radar Topography Mission, whilst the soil attribute surfaces are modelled from existing soils information. The... more

John Gallant

National Elevation and Terrain Datasets

SRTM-derived elevation and terrain covariate datasets at 1 second or 3 second resolution


John Gallant

Trevor Dowling

Jenet Austin

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