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<p>Simon,</p>
<p>epsg.io is not a reference site. You should rather consult
epsg.org</p>
<p>For CRS EPSG:29902, it refers to extent
<a class="moz-txt-link-freetext" href="https://epsg.org/extent_3767/Ireland-onshore.html">https://epsg.org/extent_3767/Ireland-onshore.html</a> which has -5.93°
as east longitude</p>
<p><a class="moz-txt-link-freetext" href="https://epsg.org/extent_1305/Europe-Ireland-Republic-and-Ulster-onshore.html">https://epsg.org/extent_1305/Europe-Ireland-Republic-and-Ulster-onshore.html</a>
has -5.34° as east longitude. So epsg.io is perhaps confused by
which extent to use, or an update has occured between the last
state of the database it used and today.<br>
</p>
<p>Even<br>
</p>
<div class="moz-cite-prefix">Le 03/01/2023 à 18:33, Simon Wright a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:LO3P123MB3291E46B21AFE558854859E390F49@LO3P123MB3291.GBRP123.PROD.OUTLOOK.COM">
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<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">Dear
All<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">Happy
New Year!<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">I’m
trying to use the GetAreaOfUse() method on a
osgeo.osr.SpatialReference to check the validity of
coordinates.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">With
the following for the Irish National Grid (EPSG:29902) I get
the WGS84 bounds – west, east, south, north - of the spatial
reference system to be -10.56, -5.93, 51.39, 55.43:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">>>>
from osgeo import osr<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">>>>
srs = osr.SpatialReference()<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">>>>
srs.ImportFromEPSG(29902)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">0<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">>>>
aou = srs.GetAreaOfUse()<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">>>>
aou.west_lon_degree, aou.east_lon_degree,
aou.south_lat_degree, aou.north_lat_degree<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">(-10.56,
-5.93, 51.39, 55.43)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">However,
at
<a href="https://epsg.io/29902%20the%20WGS84"
moz-do-not-send="true">https://epsg.io/29902 the WGS84</a>
bounds are listed as -10.56, -5.34, 51.39, 55.43.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">How
is the GetAreaOfUse() method implemented? And is there a bug
in the values stored for the EPSG:29902 projection? Or is
there another reason why the values differ to those listed
at epsg.io.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:black">Many
thanks, best wishes, Simon.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-family:"Arial",sans-serif;color:#F6A124;mso-fareast-language:EN-GB"
lang="EN-US"><o:p> </o:p></span></b></p>
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style="font-family:"Arial",sans-serif;color:#F6A124;mso-fareast-language:EN-GB"
lang="EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-family:"Arial",sans-serif;color:#F6A124;mso-fareast-language:EN-GB"
lang="EN-US">Simon Wright<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
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<p class="MsoNormal"><span
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