<div dir="ltr"><div>Mike, Thanks for your post. Indeed by assigning srid to the geom, we were back in business!</div><div><br clear="all"></div><div dir="ltr"><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span style="color:rgb(105,105,105)"><span style="font-size:12px"><span style="font-family:arial,helvetica,sans-serif"><b>Bo</b></span></span></span></div><div>
<br></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 23, 2023 at 6:25 PM Mike Taves <<a href="mailto:mwtoews@gmail.com">mwtoews@gmail.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">On Thu, 24 Aug 2023 at 13:08, Bo Guo <<a href="mailto:bo.guo@gisticinc.com" target="_blank">bo.guo@gisticinc.com</a>> wrote:<br>
> But we ran into severe (15 times) performance degradation when making CS transformation calls such as st_transform (geom, proj4, 4326)<br>
<br>
Note the docs say the geometry ST_Transform(geometry geom, text<br>
from_proj, text to_proj) is not optimized.<br>
<br>
Are you able to assign SRIDs to the geometries and use<br>
ST_Transform(geometry g1, integer srid)? Are there specific SRIDs that<br>
are slower?<br>
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