The National Elevation Data Framework envisages the creation of a nested, multi-resolution DEM for Australia. Realization of this concept will require the integration, or nesting, of disparate DEMS, both existing and new, of differing vertical accuracy and horizontal resolution, differing quality of vertical datum alignment, and generated via different data acquisition technologies.
There are an increasing number of instances where disparate DEMs over the same region have been derived at different times, using different raw data of different quality and generated at different grid densities. Significant benefits can be derived from the development of methodologies that would allow these DEMs to be integrated into a single, seamless model, whilst at the same time being related to a consistent and meaningful vertical datum.
The aim of this research is to thoroughly investigate the creation and maintenance of multi-resolution DEMs, and to develop the necessary methodologies, data processing procedures and software to achieve seamless integration of multi-source DEM data.
Contributors: Clive Fraser & Mehdi Ravanbaksh