Simpson Desert Madigan line camps Lat Long.

Also there's a few FB groups on the Madigan line that might be of interest aswel..
Here a couple I have followed in the past .

Madigan line nt

Simpson Desert adventure

That brings back some memories.
In 1995, Ian Scudamore of the Australian National Four-Wheel Drive Council organised members to gather GPS positions on treks around Australia for inclusion in the 1996 edition of "Explore Australia by Four-Wheel Drive " published by Penguin Books Australia.

We were planning a trip from Adelaide to the Kimberley in our F350 4WD with slide-on, so we put our hands up to do 3 sections, including the Kimberley and the Tanami.
We were paid some nominal fee per kilometer which was almost enough to pay for our first GPS, which sounds a bit like the one you had Michael.
We were acknowledged in the book as contributors and Penguin did send us a thank you letter and a complementary copy of the book which I still have. There were still no electronic maps, at least for our budget.

30 years on, the GPS has fundamentally changed navigation in the bush.

Cheers,
Peter
OKA196 motorhome

Peter, yes not just mapping, the changes since say 1970 in all areas is phenomenal, we seem to use the technology and take it for granted. If you wrote them all down, the list would never seem to end. I asked my grandmother when she was in her 90s, what was the most significant change that made life better. She said running water, a cold water tap in the kitchen. How things have changed. Michael

Not to be too picky but it was Ivan (and Jan) Scudamore. Both very hard workers in promoting the 4WD scene. Lovely people.

In the 1980's and 90's, the lab where I worked had a group of soil surveyors. They were very excited to get their first hand-held gps, a Trimble, I think it cost close to $12K and of course was subject to the intentional inaccuracy. In the late 80's, a family friend worked for AUSLIG (now incorporated in Geoscience Australia) and was charged with the first 'satellite mapping' of the shipping lanes through the Great Barrier Reef. I presume he used some sort of differential gps system or it was done in collaboration with the RAN hydrographers who I presume had access to the military gps system. Now your phone is probably better than all of the above and we have a 10cm terrain model of the entire country (50cm for the general public) courtesy of Space Shuttle Radar Thematic Mapper.