Anomalously Large Gradients in Version 1 of the "GEODATA 9 SECOND" Digital Elevation Model of Australia, and their Effects on Gravimetric Terrain Corrections
MetadataShow full item record
Large gradients, when calculated by a first-difference method, have been detected in the 9 arc-second National Digital Elevation Model (DEM) of Australia released by the Australian Surveying and Land Information Group. Gradient values implied by the mean elevations in the DEM between adjacent grid cells of up to 74 have been observed, most notably in Australia?s more mountainous regions in the east. Comparisons with topographic maps indicate that these are anomalous gradients in the DEM that are not present in the actual topography. It is recommended that the first-difference method is used to test DEMs before they are used to compute terrain corrections.
A link to the journal can be fournd: http://www.mappingsciences.org.au/journal.htm
Showing items related by title, author, creator and subject.
Using 2D site modelling and event water level data to quantify flow behaviours at road impediment sites in low gradient valley landscapesSarukkalige, Priyantha Ranjan; Farmer, D. (2014)Broad flat valley areas and locations dominated by low gradients are readily affected by flow impediments such as roads. These impediments can lead to water detention, flow backup, lateral inundation and additional flow ...
The effects of suspended sediment on coral reef fish assemblages and feeding guilds of north-west AustraliaMoustaka, M.; Langlois, T.; McLean, D.; Bond, T.; Fisher, R.; Fearns, Peter; Dorji, Passang; Evans, R. (2018)© 2018 Springer-Verlag GmbH Germany, part of Springer Nature Understanding environmental drivers of fish assemblage composition is fundamental to designing useful management plans for anthropogenic activities. This study ...
Campetella, G.; Botta-Dukat, Z.; Wellstein, C.; Canullo, R.; Gatto, S.; Chelli, S.; Mucina, Ladislav; Bartha, S. (2011)Land-use change due to socioeconomic factors leads to the abandonment of traditional intensive coppice management in large areas of the mountainous landscapes of the Apennines (Italy). In this study we explored the ...