<div dir="ltr">Looks like ArcGIS Pro 2.62. <br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jan 3, 2022 at 10:21 AM Zoltan <<a href="mailto:zoltans@geograph.co.za">zoltans@geograph.co.za</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
Hi Bas,<br>
Please say which version of ArcPro - I might be heading for these
type of issues in the next few months.<br>
<br>
Thanks and regards,<br>
Zoltan<br>
<br>
<div>On 2022-01-03 16:46, Sebastian Gutwein
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Ok to add to the fun I tried the calculations in
ArcPro and interestingly if I run it using calculate field with
this expression <b>!shape.geodesicArea@hectares!</b> I get the
QGIS 3.22 value of 31271112 but if I run Geoprossessing Add
Geometry Attributes I get the QGIS 3.16 value of 31271108. <br>
<div><img src="cid:17e20918638cb971f161" alt="image.png" style="margin-right: 0px;" width="202" height="180"></div>
<div>So if you want them to match I guess you should use the
python expression in ArcGIS Pro!</div>
<div><br>
</div>
<div>I guess we are back to the old adage of All Measuring is
Guessing. <br>
</div>
<div>-Bas<br>
</div>
<div><br>
</div>
<br>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jan 3, 2022 at 8:43 AM
Sebastian Gutwein <<a href="mailto:bas@rdgland.com" target="_blank">bas@rdgland.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">Yes that was my read as well except previously
it was the Grass method and now it is Geographic Lib method
because that is theoretically more accurate and is the same
method that is used in Postgis and other places. The
switched happened because someone noticed the difference
between QGIS’s calculations and Postgis’s calculations. If I
am reading the pull requests correctly even Grass has
switched to the Geographic Lib method. I’m surprised that
ArcGIS Pro uses the same method as the Grass method. </div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jan 3, 2022 at
2:57 AM Sadowski Jarosław <<a href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="PL">
<div>
<p class="MsoNormal"><span lang="EN-US">Sebastian,</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">thank you
very much for your precise answer and materials
sent - I have read them carefully.</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">So, as far
as I can understand, QGIS has moved in version
3.20 to a new way of counting areas (other
libraries? GRASS algorithm instead of Geographic
lib? I have actually noticed a different
nomenclature and definition of EPSG 2180 for
some time in new versions…), that will be more
accurate?</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">I must admit
that, for me as a GIS operator, it is surprising
and sounds like bad news - so far surfaces have
always been the same in various GIS software,
whether or not it was open-source or commercial
(ArcGIS Pro). So from this moment it will be
that I will get different surfaces depending on
the software it was calculated? :(<br>
<br>
with kind regards<br>
JS</span></p>
<p style="font-size:10pt;font-family:Arial">
</p>
<table style="width:790px" cellspacing="0" cellpadding="0" border="0">
<tbody>
<tr>
<td style="font-size:9pt;font-family:Arial;width:790px;padding-bottom:15px;color:rgb(16,43,77)" valign="top">
<p style="font-size:9pt;font-family:Arial"><font style="font-family:Calibri;color:rgb(0,0,0)" face="Calibri"><strong style="font-family:Calibri;color:rgb(16,43,77)">_____________________________</strong></font></p>
<p style="font-size:9pt;font-family:Arial;color:rgb(16,43,77)"><font style="font-family:Calibri;color:rgb(16,43,77)" face="Calibri"><strong style="font-size:10pt;font-family:Calibri;color:rgb(16,43,77)">Jarosław
Sadowski</strong><br>
<span style="font-family:Calibri;color:rgb(16,43,77)">Ekspert
ds. Baz Danych i Analiz Przestrzennych
| </span></font><em style="font-family:Calibri;color:rgb(87,87,87)">Biuro
Strategii i Planowania, Projektowania i
Inżynierii Podprogramu Kolejowego</em><br>
<span style="font-family:Calibri;color:rgb(16,43,77)"><em style="font-family:Calibri;color:rgb(16,43,77)">Database and Spatial
Analysis Expert |Railway Subprogramme
Strategy & Planning, Design &
Engineering Department</em><br>
</span><span style="font-size:9pt;font-family:Calibri;color:rgb(16,43,77)">e:
<a style="font-size:9pt;font-family:Calibri;color:rgb(16,43,77)" href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a></span></p>
</td>
<td><br>
</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<div>
<div style="border-style:solid none none;border-top-width:1pt;padding:3pt 0cm 0cm;border-top-color:rgb(225,225,225)">
<p class="MsoNormal"><b>From:</b> Sebastian
Gutwein <<a href="mailto:bas@rdgland.com" target="_blank">bas@rdgland.com</a>>
<br>
<b>Sent:</b> Saturday, January 1, 2022 7:13 AM<br>
<b>To:</b> Sadowski Jarosław <<a href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a>><br>
<b>Cc:</b> <a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a><br>
<b>Subject:</b> Re: [Qgis-user] Wrong area
count QGIS 3.20+?</p>
</div>
</div>
<p class="MsoNormal"> </p>
<table style="width:100%" width="100%" cellspacing="0" cellpadding="0" border="0" align="left">
<tbody>
<tr>
<td style="padding:5.25pt 1.5pt;background-color:rgb(166,166,166)"><br>
</td>
<td style="width:100%;padding:5.25pt 3.75pt 5.25pt 11.25pt;background-color:rgb(234,234,234)" width="100%">
<div>
<p class="MsoNormal">
<span>Nie otrzymujesz często
wiadomości e-mail z adresu
<a href="mailto:bas@rdgland.com" target="_blank">bas@rdgland.com</a>.
<a href="http://aka.ms/LearnAboutSenderIdentification" target="_blank">
Dowiedz się, dlaczego jest to ważne</a></span></p>
</div>
</td>
<td style="width:56.25pt;padding:5.25pt 3.75pt;background-color:rgb(234,234,234)" width="75">
<br>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div lang="PL">
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">There was some
discussion on this in the list serve back
in <a href="https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fpipermail%2Fqgis-user%2F2021-January%2F047638.html&data=04%7C01%7Cjaroslaw.sadowski%40cpk.pl%7Cf7cc24b07b7c42e8902a08d9ccedca61%7Cfa798250ca0b4a1bb47381cff4a1752b%7C1%7C0%7C637766145287655707%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bUHOuswrG6tPdkebzFYem%2BVsSrgjFhbSLVcKCiu6TW0%3D&reserved=0" target="_blank">
January</a> that resulted in this <a href="https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fqgis%2FQGIS%2Fissues%2F40888&data=04%7C01%7Cjaroslaw.sadowski%40cpk.pl%7Cf7cc24b07b7c42e8902a08d9ccedca61%7Cfa798250ca0b4a1bb47381cff4a1752b%7C1%7C0%7C637766145287655707%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dY89NsDscjybmwQPMV9PjPOwckPlcv%2B8TEWjl69rTtM%3D&reserved=0" target="_blank">
feature request</a> and this <a href="https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fqgis%2FQGIS%2Fpull%2F41726&data=04%7C01%7Cjaroslaw.sadowski%40cpk.pl%7Cf7cc24b07b7c42e8902a08d9ccedca61%7Cfa798250ca0b4a1bb47381cff4a1752b%7C1%7C0%7C637766145287655707%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=IRMFsaJYT7xpylDJCZNvXAUNzdmtTjNbI4VyQMKtedE%3D&reserved=0" target="_blank">
pull request</a>. I tested your polygon,
to the best of my limited ability, and the
areas were indeed different in QGIS 3.16
and 3.22 as would be expected from that
change . However it would be hoped that
the area measurement would be more
accurate in 3.22.
</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Fri, Dec 31, 2021 at
6:49 AM Sadowski Jarosław <<a href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a>>
wrote:</p>
</div>
<blockquote style="border-style:none none none solid;border-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class="MsoNormal"><span lang="EN-US">Dear
all,</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">I
am asking for help with QGIS
error/bug or verification of proper
usage of basic QGIS functionality
“$area”.</span></p>
<p class="MsoNormal"><span lang="EN-US">From
version 3.20 upwards, it counts
areas differently than before (3.18
calculated area is different than
3.20). Up to version 3.18 everything
was fine, equal to calculations from
ArcGIS Pro (geodesic mode).</span></p>
<p class="MsoNormal"><span lang="EN-US">Anyone
have an idea where the differences
come from?<br>
This is example vector <a href="https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcpkonline-my.sharepoint.com%2F%3Au%3A%2Fg%2Fpersonal%2Fjaroslaw_sadowski_cpk_pl%2FEVs0-TiEvPdBjMaqXrEvGfoBI0VussbJaYHdDVFfQnEYug%3Fe%3DVDY3rf-&data=04%7C01%7Cjaroslaw.sadowski%40cpk.pl%7Cf7cc24b07b7c42e8902a08d9ccedca61%7Cfa798250ca0b4a1bb47381cff4a1752b%7C1%7C0%7C637766145287655707%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=JlPtyjeeYHQxV0DdlGrsPwjTNy9FHqqyEqEpLNrian8%3D&reserved=0" target="_blank">
<span><img src="cid:17e209186394cff312" alt="Ikona zip" style="width: 16px; max-width: 100%;" border="0"> PL_2180.zip</span></a>:
Polish borders in EPSG: 2180, in the
table of attributes you can see the
areas (hectares) calculated for
different versions of the software.</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">with
wishes for more success in the new
year</span></p>
<p class="MsoNormal">Jarosław Sadowski</p>
</div>
<p class="MsoNormal"> </p>
<table style="width:592.5pt" width="790" cellspacing="0" cellpadding="0" border="0">
<tbody>
<tr>
<td style="width:592.5pt;padding:0cm 0cm 11.25pt" width="790" valign="top">
<p><b><span style="font-size:9pt;color:rgb(61,60,63)">_________________________________</span></b><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(61,60,63)"></span></p>
<p><b><span style="font-size:10pt;color:rgb(16,43,77)">Jarosław
Sadowski</span></b><span style="font-size:9pt;color:rgb(16,43,77)"><br>
Ekspert ds. Baz Danych i
Analiz Przestrzennych | </span><i><span style="font-size:9pt;color:rgb(87,87,87)">Biuro Strategii i Planowania,
Projektowania i Inżynierii
Podprogramu Kolejowego</span></i><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(16,43,77)"><br>
</span><i><span style="font-size:9pt;color:rgb(16,43,77)">Database
and Spatial Analysis Expert
| Railway Subprogramme
Strategy & Planning,
Design & Engineering
Department</span></i><span style="font-size:9pt;color:rgb(16,43,77)"><br>
e: <a href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank"><span style="color:rgb(16,43,77)">jaroslaw.sadowski@cpk.pl</span></a><br>
m: +48 532 720 230</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(16,43,77)"></span></p>
</td>
</tr>
<tr>
<td style="width:270pt;padding:0cm 0cm 3.75pt" width="360" valign="top">
<p><span style="font-size:5pt;font-family:Arial,sans-serif"><img src="cid:17e209186395b16b23" style="width: 192px; max-width: 100%;" border="0"></span><span style="font-size:5pt;font-family:Arial,sans-serif"></span></p>
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</div>
-- <br>
<div dir="ltr">Sent from a phone. Amazing! But possibly
garbled. Sebastian Gutwein
Regenerative Design Group
1 Chevalier Ave Greenfield MA
<a href="mailto:Bas@rdgland.com" target="_blank">Bas@rdgland.com</a>
(631) 241-1018</div>
</blockquote>
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<fieldset></fieldset>
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</pre>
</blockquote>
<br>
<pre cols="72">--
=============================================
Zoltan Szecsei GPrGISc 0031
Director, Geograph (Pty) Ltd.
GIS and Photogrammetric Services
Cape Town, South Africa.
Mobile: +27-83-6004028 (Signal, not WhatsApp)
<a href="http://www.geograph.co.za" target="_blank">www.geograph.co.za</a>
=============================================</pre>
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