Heard Island RADARSAT (2002) Digital Elevation Model (DEM)

The following are available for download from the Related URLs below: 1 The final DEM in ArcInfo interchange or ArcInfo ascii formats. 2 The rectified RADARSAT image of Heard Island acquired 24 January 2002. Rectified using ground control points and subsequently used in processing of the DEM. 3 Contours generated from the DEM and the island polygon (coastline) extracted from the rectified RADARSAT image acquired 24 January 2002. 4 A detailed deport describing the generation of the DEM. 5 A report by Dr Arko Lucieer Centre for Spatial Information Science School of Geography and Environmental Studies University of Tasmania Private Bag 76 Hobart 7001 Tasmania, Australia outlining some errors and artefacts in the DEM.

Dr Lucieer produced this report while working for the Australian Antarctic Division. On 3 July 2003 Henk Brolsma (Mapping Officer, Australian Antarctic Division) wrote the following email to the contractor who created the DEM. "What I'm really interested in are the 20 metre contours for the areas with high coherency. These are the areas where most of the field work takes place and where we have a need for contours with an accuracy better than 50 metres and my reason for using INSAR in the first instance.

So can you send me: 1. The 20 metre contours for the areas with high coherency? 2. The zone or line where the INSAR and Stereo Imagery were integrated?

This would be very useful for the metadata." He did not receive a reply to that email and that was the reason why he was reluctant to make the DEM public. Since he won't now get a reply and the DEM is probably better than the 1997 DEM, he considers the 2002 DEM should now be published.