<div dir="ltr">Anyone who have experiences to share about the <u><b>QGIS Indicatrix mapper</b></u>. I wish to use it for illustrating some of the map projections distortions highlighted in the article.<span class="gmail-Apple-style-span" style="border-collapse:separate;color:rgb(0,0,0);font-family:verdana;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"></span></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 14, 2017 at 3:37 PM, Zoltan <span dir="ltr"><<a href="mailto:zoltans@geograph.co.za" target="_blank">zoltans@geograph.co.za</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Hi Heidi,<br>
Yes, I also "stumbled across it" during some google researches
yesterday.<br>
It's a good read, and thanks for making the extra effort to tell me
about it.<br>
Kind r<br>
egards,<br>
Zoltan<div><div class="h5"><br>
<br>
<div class="m_2904608779006909314moz-cite-prefix">On 2017/12/14 15:13, Heidi Van Deventer
wrote:<br>
</div>
<blockquote type="cite">
<div class="m_2904608779006909314GroupWiseMessageBody" id="m_2904608779006909314GroupWiseSection_1513257154000_HvDeventer@csir.co.za_866D0300043C0000A636680E0C43D79B_">
<div>Coincidently I stumbled upon this article after you sent
this communication earlier this week:</div>
<div><br>
</div>
<div>Waywell T 2009 The effect of various map projections on
surface area. PositionIT July: 49 - 55</div>
<div><br>
</div>
<div><a href="https://www.ee.co.za/wp-content/uploads/legacy/PositionIT%202009/VisT-The-effect-of-various.pdf" target="_blank">https://www.ee.co.za/wp-<wbr>content/uploads/legacy/<wbr>PositionIT%202009/VisT-The-<wbr>effect-of-various.pdf</a></div>
<div><br>
</div>
<div>Kind regards,</div>
<div>Heidi<br>
</div>
<div class="m_2904608779006909314GroupWiseMessageBody" id="m_2904608779006909314GroupWiseSection_1513257153000_HvDeventer@csir.co.za_866D0300043C0000A636680E0C43D79B_"><span class="m_2904608779006909314GroupwiseReplyHeader">>>> Zoltan
<a class="m_2904608779006909314moz-txt-link-rfc2396E" href="mailto:zoltans@geograph.co.za" target="_blank"><zoltans@geograph.co.za></a> 12/12/2017 16:35 >>><br>
</span>
<div><span style="background-color:rgb(255,255,255)" bgcolor="#FFFFFF" text="#000000">> Hi Heidi,
<div><br>
</div>
<div> Thanks for the confirmation.</div>
<div> </div>
<div> Regards,</div>
<div> Zoltan</div>
<div> </div>
<div class="m_2904608779006909314moz-cite-prefix">On 2017/12/12 15:57, Heidi
Van Deventer wrote:<br>
</div>
<blockquote type="cite">
<div class="m_2904608779006909314GroupWiseMessageBody" id="m_2904608779006909314GroupWiseSection_1513085720000_HvDeventer@csir.co.za_866D0300043C0000A636680E0C43D79B_">
<div>Hi Zoltan</div>
<div><br>
</div>
<div>we use the Albers Equal Area conical projection
for South Africa with the central meridian at 25°E,
parallels 24°S and 33° S, spheroid and datum = WGS84
for calculating the extent of ecosystems at a
national scale in the National Biodiversity
Assessment for 2018.</div>
<div><br>
</div>
<div>Kind regards,</div>
<div>Heidi<br>
</div>
<div><span class="m_2904608779006909314GroupwiseReplyHeader">>>>
Zoltan <a class="m_2904608779006909314moz-txt-link-rfc2396E" href="mailto:zoltans@geograph.co.za" target="_blank"><zoltans@geograph.co.za></a>
12/12/2017 14:39 >>><br>
</span>
<div><span style="background-color:rgb(255,255,255)" bgcolor="#FFFFFF" text="#000000">> Hi
Africa-listers,
<div><br>
</div>
<div> I want to set an informal assignment for
my candidates, to help them recognise common
CRSes used in South Africa (South, not
Southern).</div>
<div> </div>
<div> Off the top of my head I can think of:</div>
<ul>
<li>Non projected Lat Long</li>
<li>Lo system (North and/or South facing)
projected from either Clarke 1880 [if very
old] or WGS84</li>
<li>UTM33-36S</li>
</ul>
Are there any others<u> in common</u> use?
<div><br>
</div>
<div> If so, by whom?</div>
<div> </div>
<div> Thanks and keep well,</div>
<div> Zoltan</div>
<div> </div>
--
<pre class="m_2904608779006909314moz-signature" cols="72">==============================<wbr>===============
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services
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==============================<wbr>===============</pre>
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<pre class="m_2904608779006909314moz-signature" cols="72">--
==============================<wbr>===============
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services
P.O. Box 7, Muizenberg 7950, South Africa.
Mobile: <a href="tel:083%20600%204028" value="+27836004028" target="_blank">+27-83-6004028</a>
Fax: <a href="tel:086%20611%205323" value="+27866115323" target="_blank">+27-86-6115323</a> <a class="m_2904608779006909314moz-txt-link-abbreviated" href="http://pta-smg2.csir.co.za:32224/?dmVyPTEuMDAxJiZkYWFjMWZiY2EyM2E4ZGZkOD01QTJGRTkxQ18yMDA3OV8xMjI5OF8xJiY0MmVmNzhhZWYxODczNTY9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZ3d3clMkVnZW9ncmFwaCUyRWNvJTJFemE=" target="_blank">www.geograph.co.za</a>
==============================<wbr>===============</pre>
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<pre class="m_2904608779006909314moz-signature" cols="72">--
==============================<wbr>===============
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services
P.O. Box 7, Muizenberg 7950, South Africa.
Mobile: <a href="tel:083%20600%204028" value="+27836004028" target="_blank">+27-83-6004028</a>
Fax: <a href="tel:086%20611%205323" value="+27866115323" target="_blank">+27-86-6115323</a> <a class="m_2904608779006909314moz-txt-link-abbreviated" href="http://www.geograph.co.za" target="_blank">www.geograph.co.za</a>
==============================<wbr>===============</pre>
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</div>