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<div dir="ltr" data-setdir="false">A similar question was asked on this list not so long ago. You may want to look at this thread:</div><div dir="ltr" data-setdir="false"><a href="http://osgeo-org.1560.x6.nabble.com/Question-On-quot-BallPark-Transform-quot-td5431149.html#none" rel="nofollow" target="_blank" class="">http://osgeo-org.1560.x6.nabble.com/Question-On-quot-BallPark-Transform-quot-td5431149.html#none</a><br></div><div><br></div><div dir="ltr" data-setdir="false">-Thayer</div><div><br></div><div><br></div><div>===================================================</div></div><div id="ydpda9fac7fyahoo_quoted_8843346863" class="ydpda9fac7fyahoo_quoted"><div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;"><div><div dir="ltr">Message: 1<br></div><div dir="ltr">Date: Sat, 2 May 2020 13:45:44 +0930<br></div><div dir="ltr">From: Rick Bishop <<a href="mailto:rickbish@bigpond.com" rel="nofollow" target="_blank">rickbish@bigpond.com</a>><br></div><div dir="ltr">To: "<a href="mailto:qgis-user@lists.osgeo.org" rel="nofollow" target="_blank">qgis-user@lists.osgeo.org</a>" <<a href="mailto:qgis-user@lists.osgeo.org" rel="nofollow" target="_blank">qgis-user@lists.osgeo.org</a>><br></div><div dir="ltr">Subject: [Qgis-user] FW: Help with georeferencing AGD66 Topo map<br></div><div dir="ltr">Message-ID: <<a href="mailto:5E8A564B04F6241C@smtp.telstra.com" rel="nofollow" target="_blank">5E8A564B04F6241C@smtp.telstra.com</a>> (added by<br></div><div dir="ltr"> <a href="mailto:postmaster@smtp.telstra.com" rel="nofollow" target="_blank">postmaster@smtp.telstra.com</a>)<br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Hi- I am seeking help with this.<br></div><div dir="ltr"><br></div><div dir="ltr">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.<br></div><div dir="ltr"><br></div><div dir="ltr">I have been successful with similar maps that use WGS 84, but can’t work this one out.<br></div><div dir="ltr"><br></div><div dir="ltr">I am figuring this out /doing this in my spare time for ametuer use in Avenza by the local bushwalking club.<br></div><div dir="ltr"><br></div><div dir="ltr">Attached are screen shots<br></div><div dir="ltr"><br></div><div dir="ltr">• Error message is about a Ballpark transformation. Also says : Used a ballpark transform EPSG: 4202 to EPSG: 3426<br></div><div dir="ltr"><br></div><div dir="ltr">• Project Properties<br></div><div dir="ltr"><br></div><div dir="ltr">• Transformation settings<br></div><div dir="ltr"><br></div><div dir="ltr">• GCP table -as with previous success maps I am using the UTM Grid for coordinates: Example 501000 / 8258000<br></div><div dir="ltr"><br></div><div dir="ltr">• Map Info<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Map details are Beasley Knob 4766 3 which I downloaded here:<br></div><div dir="ltr">GeoScience Aust 1:50 Maps<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">So any guidance appreciated- I image it’s a simple mistake.<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Kind regards<br></div><div dir="ltr"><br></div></div></div></div></body></html>