[Qgis-user] FW: Help with georeferencing AGD66 Topo map

[Thayer Young]

 A similar question was asked on this list not so long ago. You may want to look at this thread:http://osgeo-org.1560.x6.nabble.com/Question-On-quot-BallPark-Transform-quot-td5431149.html#none

-Thayer

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Date: Sat, 2 May 2020 13:45:44 +0930
From: Rick Bishop <rickbish at bigpond.com>
To: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: [Qgis-user] FW: Help with georeferencing AGD66 Topo map
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Hi- I am seeking help with this.

I have been trying without success for a while to georeference a topo map that is in  Australian Geodetic Datum 1966, using both EPSG: 20250 and EPSG :4202.  I think 20250 is preferred.

I have been successful with similar maps that use WGS 84, but can’t work this one out.

I am figuring this out /doing this in my spare time for ametuer use in Avenza by the local bushwalking club.

Attached are screen shots

• Error message is about a Ballpark transformation. Also says : Used a ballpark transform EPSG: 4202 to EPSG: 3426

• Project Properties

• Transformation settings

• GCP table -as with previous success maps I am using the UTM Grid for coordinates: Example 501000 / 8258000

• Map Info


Map details are Beasley Knob 4766 3 which I downloaded here:
GeoScience Aust 1:50 Maps


So any guidance appreciated- I image it’s a simple mistake.


Kind regards

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