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--></style></head><body lang=EN-AU link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Hi- I am seeking help with this.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>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.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have been successful with similar maps that use WGS 84, but can’t work this one out.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I am figuring this out /doing this in my spare time for ametuer use in Avenza by the local bushwalking club.</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Attached are screen shots<o:p></o:p></b></p><p class=MsoNormal><b><o:p> </o:p></b></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Error message is about a Ballpark transformation. Also says : <i>Used a ballpark transform EPSG: 4202 to EPSG: 3426<o:p></o:p></i></li></ul><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Project Properties<o:p></o:p></li></ul><p class=MsoListParagraph><o:p> </o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Transformation settings<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>GCP table -as with previous success maps I am using the UTM Grid for coordinates: <i>Example 501000 / 8258000<o:p></o:p></i></li></ul><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Map Info<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Map details are Beasley Knob 4766 3 which I downloaded here:<o:p></o:p></p><p class=MsoNormal><span lang=EN-US><a href="https://geoscience-au.maps.arcgis.com/apps/opsdashboard/index.html#/b5deb336a04f456da5eb904f3e146f0d">GeoScience Aust 1:50 Maps</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So any guidance appreciated- I image it’s a simple mistake.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Kind regards<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10<o:p></o:p></p><p class=MsoNormal>42<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>