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<p class="MsoNormal"><span lang="EN-GB">Hello everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I need some help in terms of splitting polygons based on the polygon area. I am using PostgreSQL 9.5.12/PostGIS 2.3 on Windows 10 (x64). I have two tables i.e. polygon (poly) and points (pts) in my Postgres db. Some of
the polygons contain points inside them while, some do not (sample scenario below):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><img width="262" height="308" style="width:2.7291in;height:3.2083in" id="Picture_x0020_1" src="cid:image001.png@01D40632.134FDF00"><span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The following query:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">/*Start of query*/<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Select <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> a.gid poly_id, count(b.geom) pt_cnt,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> st_area(a.geom)::int poly_area<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">FROM<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> poly a<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">LEFT JOIN<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> pts b <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">ON st_contains(a.geom, b.geom) <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">GROUP BY a.gid<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Order by a.gid;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">/*End of query*/<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Returns the area of polygons (from left to right) as 1079, 744, 340 square-meter, respectively. I need to split these polygons' geometry based on the area i.e. if area is above 100 meter-square, then each polygon needs
to be divided/split into “approximate equal” parts (assuming that majority of the polygons are
<i>straightforward</i> like above). The division does not have to be “strictly” equal. Does anyone know or have any idea how this can be achieved?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB">Side Notes:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">I earlier posted this question here at
<a href="https://gis.stackexchange.com/questions/286184/postgis-how-do-i-split-polygon-in-equal-parts-based-on-polygon-area">
GIS SE</a><o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Also, came across <a href="https://gis.stackexchange.com/questions/239801/how-can-i-split-a-polygon-into-two-equal-parts-along-a-n-s-axis">
this</a> relevant question but I guess my problem is different<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Any help or idea(s) would be highly appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">/Jibran<o:p></o:p></span></p>
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