Point Elevation Data File for Australia. Australian Surveying and Land Information Group, Belconnen, ACT, Australia. The elevation data are point elevations captured at an irregular interval spacing to best portray the terrain. The spot elevation feature contains either spot heights on the source material or points selected from contours.
Spot heights are individual point elevations in the source material.
They are generally located at local high points such as sand ridges, hills and mountain tops or at the low points in depressions. These points were observed directly by stereoplotter in the map production process. Click on the image to view larger size. Inspection of the source data found that topographic contour intervals tended to range from 10 meters upwards. Of course, in areas of low relief, one might expect fewer topographic contours.