The third dimension, elevation, is a vital component of Australiaís National Spatial Data
Infrastructure. Elevation information in an easily accessible digital form is necessary for …

Digital elevation models (DEMs) are fundamental data infrastructure that support a large
range of applications in environmental modelling. The distribution of solar radiation, patterns …

Digital elevation data spaced on a regular 30 m grid were generated over a region of
moderate topography in south-east Australia. Six algorithms for calculating gradient and …

The article offers information on the on the accuracy of the NZDEM_SoS_v1. 0 digital
elevation model (DEM) in surveying the total land area of New Zealand. The technology was …

One of the first digital elevation models (DEMs) used in South Africa was manually derived
in the early 1980s from the 1: 50 000 scale topographical maps at a spatial resolution of one …

Terrain position (eg, ridge, mid-slope, valley) is a potentially useful variable with which to
model environmental parameters and processes using geographical information systems …

1 BACKGROUND In an effort to address the need for a high-resolution digital elevation
model (DEM) of the Western Cape, the Centre for Geographical Analysis (CGA) developed …

Data covering the whole of the surface of the Earth in a homogeneous and reliable manner
has been accumulating over many years. This type of data became available from …