<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="">Sorry, forgot to mention that provinces have different standard parallels and longitudes of centres, of course!<div class=""><br class=""></div><div class="">— Charles.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 12 Dec 2017, at 16:18, Charles Rethman <<a href="mailto:rethman@telkomsa.net" class="">rethman@telkomsa.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear Zoltan,<div class=""><br class=""></div><div class="">I also used AEA with standard parallels at 24 and 33 and the longitude of centre at 25 for national maps (mostly livelihoods zoning) as well. I also used it for working on whole provinces as well, because most provinces don’t fit into the bounds for SACRS or UTM.</div><div class=""><br class=""></div><div class="">Charles.<br class="">
<br class=""><br class="">
<br class=""><br class=""><div class="">
<div style="letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Charles Rethman</span><br style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">19 Sans Souci Road, Newlands, 7700<div class=""><a href="mailto:rethman@telkomsa.net" class="">rethman@telkomsa.net</a> <a href="mailto:rethman@me.com" class="">rethman@me.com</a></div><div class=""><i class="">skype</i>: cwrethman</div><div class=""><i class="">mobile</i>: +27 71 6735502</div><div class=""><i class="">home</i>: +27 21 6861510<br class=""><br class=""></div></div>
</div>
<div class=""><br class=""><blockquote type="cite" class=""><div class="">On 12 Dec 2017, at 16:08, Zoltan <<a href="mailto:zoltans@geograph.co.za" class="">zoltans@geograph.co.za</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Sorry Dave - I missed acknowledging you on my previous response.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Yes,... I had forgotten about the Goldfields one (having worked with it in the eighties!) - but I'm not going to toss that one into the pile.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">I'm aiming at producing a guideline for recognising common RSA CRSes by the numeric values of the coords, and if necessary (like the 2-Deg Lo bands) some knowledge of the approx location of the AOI.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Thanks for your input.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Regards,</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Zoltan</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><div class="moz-cite-prefix" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);">On 2017/12/12 15:11, david wrote:<br class=""></div><blockquote type="cite" cite="mid:005101d3734a$a8d40e00$fa7c2a00$@kirchhoffsurveyors.co.za" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Some of the mines still use the various Goldfields systems but few and far between, maybe more important to go from a local coordinate system(sides and angles) to a commonly used coordinate system such as the LO system as many of the properties in SA were surveyed on a local system with no coordinates.<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""> </o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Regards<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Dave<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" 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 0in 0in;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: windowtext;" class="">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: windowtext;" class=""><span class="Apple-converted-space"> </span>Africa [<a class="moz-txt-link-freetext" href="mailto:africa-bounces@lists.osgeo.org" style="color: purple; text-decoration: underline;">mailto:africa-bounces@lists.osgeo.org</a>]<span class="Apple-converted-space"> </span><b class="">On Behalf Of<span class="Apple-converted-space"> </span></b>Zoltan<br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Tuesday, 12 December, 2017 2:40 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Africa local chapter discussions<span class="Apple-converted-space"> </span><a class="moz-txt-link-rfc2396E" href="mailto:africa@lists.osgeo.org" style="color: purple; text-decoration: underline;"><africa@lists.osgeo.org></a><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>[OSGeo Africa] CRS in use in South Africa<o:p class=""></o:p></span></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Hi Africa-listers,<br class="">I want to set an informal assignment for my candidates, to help them recognise common CRSes used in South Africa (South, not Southern).<br class=""><br class="">Off the top of my head I can think of:<o:p class=""></o:p></div><ul type="disc" style="margin-bottom: 0in;" class=""><li class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">Non projected Lat Long<o:p class=""></o:p></li><li class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">Lo system (North and/or South facing) projected from either Clarke 1880 [if very old] or WGS84<o:p class=""></o:p></li><li class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">UTM33-36S<o:p class=""></o:p></li></ul><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Are there any others<u class=""><span class="Apple-converted-space"> </span>in common</u><span class="Apple-converted-space"> </span>use?<br class="">If so, by whom?<br class=""><br class="">Thanks and keep well,<br class="">Zoltan<br class=""><br class="">--<span class="Apple-converted-space"> </span><o:p class=""></o:p></div><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""> </o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">=============================================<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">Zoltan Szecsei GPrGISc 0031<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">Geograph (Pty) Ltd.<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">GIS and Photogrammetric Services<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""> </o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">P.O. Box 7, Muizenberg 7950, South Africa.<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""> </o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">Mobile: +27-83-6004028<o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">Fax: +27-86-6115323 <a href="http://www.geograph.co.za/" moz-do-not-send="true" style="color: purple; text-decoration: underline;" class="">www.geograph.co.za</a><o:p class=""></o:p></pre><pre style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">=============================================<o:p class=""></o:p></pre></div><br class=""><fieldset class="mimeAttachmentHeader"></fieldset><br class=""><pre wrap="" style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">_______________________________________________
Africa mailing list
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You can UNSUBSCRIBE at <a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/africa" style="color: purple; text-decoration: underline;">https://lists.osgeo.org/mailman/listinfo/africa</a></pre></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><pre class="moz-signature" cols="72" style="margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: "Courier New"; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);">--
=============================================
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services
P.O. Box 7, Muizenberg 7950, South Africa.
Mobile: +27-83-6004028
Fax: +27-86-6115323 <a class="moz-txt-link-abbreviated" href="http://www.geograph.co.za/" style="color: purple; text-decoration: underline;">www.geograph.co.za</a>
=============================================</pre><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">Africa mailing list</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><a href="mailto:Africa@lists.osgeo.org" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">Africa@lists.osgeo.org</a><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); float: none; display: inline !important;" class="">You can UNSUBSCRIBE at<span class="Apple-converted-space"> </span></span><a href="https://lists.osgeo.org/mailman/listinfo/africa" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">https://lists.osgeo.org/mailman/listinfo/africa</a></div></blockquote></div><br class=""></div></div></div></div></blockquote></div><br class=""></div></body></html>