Welcome to XNATMAP
A site for preserving NATMAP's (The Division of National Mapping) history and
maintaining contact with the people who were part of that history.
As the Australian Landsat Station (ALS), later the Australian Centre for Remote
Sensing (ACRES) was part of the Division its history also forms part of this site.
What's New as of 1 January 2022
Hover over a title for a synopsis or click associated Item tag for its manuscript
In a Time of Timeballs
A brief review of the worldwide introduction and use of Timeballs.
Alan Mould (1942-2005)
From 1966 to 1971, Alan Mould worked as a Field Assistant and later as a Technical Assistant based from Nat Map's Rialto Building office in Melbourne. Initially, Alan worked mainly in remote and lesser settled areas of mainland Australia in ground marking and later measuring field survey parties as part of Nat Map's Aerodist program to provide horizontal survey control for the 1 : 100 000 scale national topographic map program. During this period Alan also worked in barometric heighting and spot photography field parties. From 1970, Alan worked on map examination and map accuracy surveys in North Queensland. In this article Laurie McLean gives a biographic outline of Alan Mould and some of his family members.
Baselines for Geodetic Triangulation Surveys in Australia
From the mid 1820s until the adoption of electronic distance measuring in the 1950s, geodetic triangulation had been the main method of undertaking colonial, state, federal and defence surveys for Australian mapping. Implicit in any triangulation was the measurement of at least two baselines, unless only a couple of triangles were involved. One baseline near the start of the triangulation and the other near the end. Two baselines then provided an overall check on the accuracy of the completed triangulation. This work by Paul Wise gives an account of 63 triangulation baselines, plus a mention of a number of other baselines on islands and Tasmania. In doing so the history of geodetic triangulation surveys in Australia, is reviewed.
Australian Primary Data Acquisition Progress Maps for Topographic Mapping 1827-1988
While there were various maps showing a south land from antiquity and the later navigator/explorers, these maps were mostly of coastline. Some forty years after the First Fleet arrived, in 1827 then Major (later Sir) Thomas Livingstone Mitchell (1792-1855) as Surveyor General saw the first systematic surveying and mapping of Australia. After that, settlement drove the need for mapping. As the XNATMAP website enters it fifteenth year an accumulation of information on Australian primary data acquisition for topographic mapping, gathered and standardised during those years, is presented by Paul Wise.