<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Jordan and thanks FC<div class=""><br class=""></div><div class="">I’m not sure how FC did the projection / transformation but you can use QGIS, proj or a number of other tools.</div><div class=""><br class=""></div><div class="">An issue to be aware of is that no GIS will do an accurate datum transformation from Cape to WGS84/Hartebeeshoek94 since there are different errors all over the country, as much as 300m. If you need accuracy, rather speak to a land surveyor, who can do a local transformation taking into account the known errors. </div><div class=""><br class=""></div><div class="">Gavin<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 22 Mar 2024, at 09:25, Jordaan Fouche via qgis-za-user <<a href="mailto:qgis-za-user@lists.osgeo.org" class="">qgis-za-user@lists.osgeo.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt;" class="">Thank you FC, what software did you use to do the transformation?<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt;" class="">Could you explain in a bit more detail?<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Jordaan Fouche</span><span lang="EN-GB" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Portion 11<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Van Reenen Country Estate<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Van Reenen<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">3372<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Republic of South Africa<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span lang="EN-GB" style="font-family: Calibri, sans-serif;" class="">Tel: +27 (0)82 555 4227<o:p class=""></o:p></span></div></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt;" class=""><o:p class=""> </o:p></span></div><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><b class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="Apple-converted-space"> </span>FC Basson <<a href="mailto:FC.Basson@westerncape.gov.za" style="color: blue; text-decoration: underline;" class="">FC.Basson@westerncape.gov.za</a>><span class="Apple-converted-space"> </span><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Thursday, March 21, 2024 8:26 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span><a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:j.fouche9@gmail.com" style="color: blue; text-decoration: underline;" class="">j.fouche9@gmail.com</a><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [QGIS-ZA-user] Coordinate conversion from Cape Datum Lo27? to EGS 84<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class="">Just a slight edit to the Google Maps link:<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><a href="https://maps.app.goo.gl/VVS9XDfhjp88dXw97" style="color: blue; text-decoration: underline;" class="">https://maps.app.goo.gl/VVS9XDfhjp88dXw97</a><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class="">And if you prefer OSM:<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><a href="https://www.openstreetmap.org/?mlat=-26.82808180999955&mlon=28.591287809999518#map=12/-26.8281/28.5913" style="color: blue; text-decoration: underline;" class="">https://www.openstreetmap.org/?mlat=-26.82808180999955&mlon=28.591287809999518#map=12/-26.8281/28.5913</a><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class="MsoNormal" align="center" style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif; text-align: center;"><hr size="2" width="98%" align="center" class=""></div><div id="divRplyFwdMsg" class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""> qgis-za-user <<a href="mailto:qgis-za-user-bounces@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user-bounces@lists.osgeo.org</a>> on behalf of FC Basson via qgis-za-user <<a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a>><br class=""><b class="">Sent:</b> 21 March 2024 20:09<br class=""><b class="">To:</b> <a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a><span class="Apple-converted-space"> </span><<a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a>><br class=""><b class="">Cc:</b> FC Basson <<a href="mailto:FC.Basson@westerncape.gov.za" style="color: blue; text-decoration: underline;" class="">FC.Basson@westerncape.gov.za</a>>;<span class="Apple-converted-space"> </span><a href="mailto:j.fouche9@gmail.com" style="color: blue; text-decoration: underline;" class="">j.fouche9@gmail.com</a><span class="Apple-converted-space"> </span><<a href="mailto:j.fouche9@gmail.com" style="color: blue; text-decoration: underline;" class="">j.fouche9@gmail.com</a>><br class=""><b class="">Subject:</b> Re: [QGIS-ZA-user] Coordinate conversion from Cape Datum Lo27? to EGS 84</span><o:p class=""></o:p></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""> <o:p class=""></o:p></div></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class="">I was able to locate the farm and can confirm that the coordinate should be in LO 29. <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><span id="cid:image001.png@01DA7C3A.DEDC5520"><image001.png></span></span><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class="">For GIS purposes, we use the rotated coordinate system, so the coordinates should be X: -40600, Y: -<span style="background-color: white;" class="">2968350, which converts to geographic coordinate of Lat: -26.828082, Lon: 28.591288, if you assume the input datum is Cape. And here is a link to the location in Google Maps:<span class="Apple-converted-space"> </span><a href="https://maps.app.goo.gl/bEwU4pMa35Db2gpNA" style="color: blue; text-decoration: underline;" class="">https://maps.app.goo.gl/bEwU4pMa35Db2gpNA</a></span></span><span style="font-family: "Century Gothic", sans-serif;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: "Century Gothic", sans-serif;" class="">Regards<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: "Century Gothic", sans-serif;" class="">FC Basson<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-size: 11pt; font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><span style="font-family: "Century Gothic", sans-serif;" class=""><o:p class=""> </o:p></span></div></div><div class="MsoNormal" align="center" style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif; text-align: center;"><hr size="2" width="98%" align="center" class=""></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""> qgis-za-user <<a href="mailto:qgis-za-user-bounces@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user-bounces@lists.osgeo.org</a>> on behalf of Jordaan Fouche via qgis-za-user <<a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a>><br class=""><b class="">Sent:</b> 21 March 2024 17:14<br class=""><b class="">To:</b> <a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a><span class="Apple-converted-space"> </span><<a href="mailto:qgis-za-user@lists.osgeo.org" style="color: blue; text-decoration: underline;" class="">qgis-za-user@lists.osgeo.org</a>><br class=""><b class="">Cc:</b> <a href="mailto:j.fouche9@gmail.com" style="color: blue; text-decoration: underline;" class="">j.fouche9@gmail.com</a><span class="Apple-converted-space"> </span><<a href="mailto:j.fouche9@gmail.com" style="color: blue; text-decoration: underline;" class="">j.fouche9@gmail.com</a>><br class=""><b class="">Subject:</b> [QGIS-ZA-user] Coordinate conversion from Cape Datum Lo27? to EGS 84<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 12pt; font-family: Aptos, sans-serif;" class=""> <o:p class=""></o:p></div></div><div class=""><span style="font-size: 11pt;" class="">Have a set of old borehole data that I wish to plot in QGIS.<o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class="">They were clearly drilled pre 1994 (Hartebeesthoek) and I am really struggling to plot them on QGIS. I suspect they may be Cape Datum.<o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class="">The example that I am including is on the farm Rietvley 600 in the Balfour district.<o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class="">The coordinates are legible as X:2968350;Y: 40600.<o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class="">Can somebody please help me.<o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Jordaan Fouche</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Portion 11</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Van Reenen Country Estate</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Van Reenen</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">3372</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Republic of South Africa</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class=""> </span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-family: Calibri, sans-serif;" class="">Tel: +27 (0)82 555 4227</span><span style="font-size: 11pt;" class=""><o:p class=""></o:p></span></div><div class=""><span style="font-size: 11pt;" class=""> <o:p class=""></o:p></span></div><div class=""><span style="font-size: 8pt; font-family: "Century Gothic", sans-serif;" class="">"All views or opinions expressed in this electronic message and its attachments are the view of the sender and do not necessarily reflect the views and opinions of the Western Cape Government (the WCG). No employee of the WCG is entitled to conclude a binding contract on behalf of the WCG unless he/she is an accounting officer of the WCG, or his or her authorised representative.<br class="">The information contained in this message and its attachments may be confidential or privileged and is for the use of the named recipient only, except where the sender specifically states otherwise.<br class="">If you are not the intended recipient you may not copy or deliver this message to anyone."<o:p class=""></o:p></span></div><div class=""><span style="font-size: 8pt; font-family: "Century Gothic", sans-serif;" class="">"All views or opinions expressed in this electronic message and its attachments are the view of the sender and do not necessarily reflect the views and opinions of the Western Cape Government (the WCG). 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