<p>Hello, <br>
I posted this question on the mapnik gitgub, but it seems not to be the right place <br>
I have some trouble with the shapes of my polygons using mapnik when these polygons are representing very very small area (at zoom 29 for example) The shape of the obtained polygon (see below) makes me think that the lat/lon coordinates are somehow cut or rounded <br>
Is there a way to increase precision of lat and long at osm2pgsql import ? Or is it something related to PostGis? Or to Mapnik? </p>
<p>Any suggestions would be very welcome, </p>
<p>Thanks</p>
<p><a href="https://camo.githubusercontent.com/e6bf0f25bc9a0b9cfd91b453bf117798ffb0085c/68747470733a2f2f636c6f756467697468756275736572636f6e74656e74636f6d2f6173736574732f31353031313332382f31313839393839352f38656434356261382d613561322d313165352d396263382d313836363830656234396334706e67" target="_blank"><img src="https://camo.githubusercontent.com/e6bf0f25bc9a0b9cfd91b453bf117798ffb0085c/68747470733a2f2f636c6f756467697468756275736572636f6e74656e74636f6d2f6173736574732f31353031313332382f31313839393839352f38656434356261382d613561322d313165352d396263382d313836363830656234396334706e67" alt="image" data-canonical-src="https://cloudgithubusercontentcom/assets/15011328/11899895/8ed45ba8-a5a2-11e5-9bc8-186680eb49c4png" style="max-width:100%;"></a></p>
<p>NB: I checked that the precision of my input (xml osm) data was ok (in the file I load with osm2pgsql)</p>
<p>Here are the coordinates of the polygon on the right in the figure:</p>
<div class="highlight highlight-text-shell-session"><pre><span class="pl-mo">lat lon</span>
<span class="pl-mo">368593577908583469593 -1364353178351570328175</span>
<span class="pl-mo">368593577762137325493 -1364353178072946803923</span>
<span class="pl-mo">368593577646674175341 -1364353177780122727825</span>
<span class="pl-mo">368593577563547691867 -1364353177476531620016</span>
<span class="pl-mo">368593577513732517659 -1364353177165732589060</span>
<span class="pl-mo">368593577497812585619 -1364353176851369475742</span>
<span class="pl-mo">368593577515974635261 -1364353176537128042867</span>
<span class="pl-mo">368593577568005725809 -1364353176226692276884</span>
<span class="pl-mo">368593577653295811913 -1364353175923701755323</span>
<span class="pl-mo">368593577770844937902 -1364353175631709014226</span>
<span class="pl-mo">368593577919274961729 -1364353175354137093223</span>
<span class="pl-mo">368593578096845675418 -1364353175094240633314</span>
<span class="pl-mo">368593578301475188752 -1364353174855066264115</span>
<span class="pl-mo">368593578530764487411 -1364353174639418320169</span>
<span class="pl-mo">368593578782025321772 -1364353174449825090164</span>
<span class="pl-mo">368593579052311914879 -1364353174288509329415</span>
<span class="pl-mo">368593579338455334948 -1364353174157362325047</span>
<span class="pl-mo">368593579637100843271 -1364353174057921691542</span>
<span class="pl-mo">368593579944747151700 -1364353173991353251893</span>
<span class="pl-mo">368593580257787323262 -1364353173958437537294</span>
<span class="pl-mo">368593580572551227093 -1364353173959560194817</span>
<span class="pl-mo">368593580885348615084 -1364353173994708257055</span>
<span class="pl-mo">368593581192512198541 -1364353174063469786859</span>
<span class="pl-mo">368593581490440769244 -1364353174165038318222</span>
<span class="pl-mo">368593581775641343512 -1364353174298223159155</span>
<span class="pl-mo">368593582044770284867 -1364353174461462891998</span>
<span class="pl-mo">368593582294672206245 -1364353174652843669890</span>
<span class="pl-mo">368593582522417317904 -1364353174870121776507</span>
<span class="pl-mo">368593582725335489059 -1364353175110749738508</span>
<span class="pl-mo">368593582901047689404 -1364353175371906523594</span>
<span class="pl-mo">368593582901047689404 -1364353175371906523594</span>
<span class="pl-mo">368593582926684426582 -1364353175448112409640</span>
<span class="pl-mo">368593582922754592346 -1364353175540891882633</span>
<span class="pl-mo">368593582889304238748 -1364353175649157101645</span>
<span class="pl-mo">368593582826725496560 -1364353175771638682079</span>
<span class="pl-mo">368593582735752089974 -1364353175906900794701</span>
<span class="pl-mo">368593582617450588046 -1364353176053357330488</span>
<span class="pl-mo">368593582473207970196 -1364353176209291440557</span>
<span class="pl-mo">368593582304715328135 -1364353176372875076083</span>
<span class="pl-mo">368593582113948103895 -1364353176542189949316</span>
<span class="pl-mo">368593581903142863965 -1364353176715251336759</span>
<span class="pl-mo">368593581674771098022 -1364353176890030105994</span>
<span class="pl-mo">368593581431510308732 -1364353177064477229408</span>
<span class="pl-mo">368593581176212392592 -1364353177236547409734</span>
<span class="pl-mo">368593580911870599692 -1364353177404223416147</span>
<span class="pl-mo">368593580641584050994 -1364353177565539176896</span>
<span class="pl-mo">368593580368521589463 -1364353177718603404855</span>
<span class="pl-mo">368593580095884654213 -1364353177861621801981</span>
<span class="pl-mo">368593579826869621741 -1364353177992917487416</span>
<span class="pl-mo">368593579564630502432 -1364353178110951070323</span>
<span class="pl-mo">368593579312241770296 -1364353178214338768726</span>
<span class="pl-mo">368593579072662480556 -1364353178301868574351</span>
<span class="pl-mo">368593578848701497463 -1364353178372514108219</span>
<span class="pl-mo">368593578642984498472 -1364353178425447055133</span>
<span class="pl-mo">368593578457923332081 -1364353178460047111287</span>
<span class="pl-mo">368593578295687729351 -1364353178475908379141</span>
<span class="pl-mo">368593578158179724369 -1364353178472845051772</span>
<span class="pl-mo">368593578047011449783 -1364353178450893011586</span>
<span class="pl-mo">368593577963486307425 -1364353178410309475055</span>
<span class="pl-mo">368593577908583469593 -1364353178351570328175</span></pre></div>
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