[Qgis-user] Projection / Custom CRS help

[Phil (The Geek) Wyatt]

Here is a good place to start for information on older datums.

 

http://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/geodetic-datums/historical-datums-of-australia/australian-map-grid

 

http://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/geodetic-datums/historical-datums-of-australia

 

But I would be trying AGD66 first as the most likely contender at that time.

 

Cheers - Phil

 

From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Matt Boyd
Sent: Monday, 9 May 2016 2:07 PM
To: qgis-user
Subject: [Qgis-user] Projection / Custom CRS help

 

Hi QGISer's,

I've got some data acquired in Australia in 1967. The acquisition reports mention a false easting and northing and a TM projection.

I'm assuming TM means Transverse Mercator.

It's early 1967 data and doesn't mention AGD66 anywhere. However a some of the reference docs mention measurements in yards and feet.

 

All of the historical analysis of the data that I can find dates back to the early 1980's and late 1970's and these all assume AGD66. 

 

I would like to be able to create a custom CRS that I can load the original data into (or a smaller portion of it) to confirm that the data has been transformed over the years correctly.

 

Is anyone familiar with pre-AGD66 projections in Australia and any idea how I'd go down this road?

 

Thanks

Matt

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