Critical Aeronautical Heights for Australia, 30 deg. by 30 deg., Australian Survey and Land Information Group (AUSLIG)Entry ID: auslig_m7
Abstract: The M7 data represent the highest points in each 30 minute by 30
minute grid square for Australia.
The following text was abstracted from Bruce Gittings' Digital
Elevation Data Catalogue: http://www.geo.ed.ac.uk/home/ded.html.
The catalogue is a comprehensive source of information on digital
elevation data and should ... be retrieved in its entirety for additional
Australian Data is available from the Australian Survey and Land
Information Group (AUSLIG). There are three products; M7 are Critical
Aeronautical Heights which represent the highest point in each 30'x30'
quad, M8 are Spot heights (ie. an irregular grid) and M9 represents an
18" (~500m) grid at 1:250,000 scale (gridded from M8 using an
Hutchinson Algorithm). Both M8 and M9 have incomplete coverage of the
The 500m grid covers 30% of Australia (Southern New South Wales,
Victoria, parts of Northern Queensland and selected cities). The size
of the 1:250 000 scale files is 60,501 points each x 63 files =
38,176,131 elevation points. Costs: License 1:250 000 AU$1000 / File
1:100 000 AU$250.
NB. 1996: 100m and 200m DEMs covering all of Australia are also
now available. Prices are as follows (in US Dollars):
Per km2 Total Cost Copyright Restrictions
------- ---------- ----------------------
100m DEM $0.0028 $21,433 One-time license fee
200m DEM $0.0017 $13,089 " "
Start Date: 1995-01-01Stop Date: 1995-12-31
Latitude Resolution: 30 Minute
Longitude Resolution: 30 Minute
Vertical Resolution: 1 foot
ISO Topic Category
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
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Creation and Review Dates
Last DIF Revision Date: 2016-11-18