<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Question that comes to mind: how big are these TINs of which you speak?<div class=""><br class=""></div><div class="">I mean, we have a TIN object now, but as with POLYGON and LINESTRING, the expectation is that the TIN fits in-memory. Which means the API is pretty simple, no? Just ST_Something(TIN) returns POLYGON. ST_Union(TIN, TIN) returns TIN? I mean, write out your list of functions, and what they do, I cannot imagine they’ll be too terrible. It only gets terrible when we need to model something larger than memory (ala topology)</div><div class=""><br class=""></div><div class="">P</div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 27, 2019, at 10:02 AM, Darafei Komяpa Praliaskouski <<a href="mailto:me@komzpa.net" class="">me@komzpa.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Let's imagine I have a bunch 2.5D TINs representing some measurement - say, a travel time to a central point. I want to perform operations on top of these:<br class=""><br class=""></div><div class=""> - for each TIN in the group I would like to get a 2D polygon of bounds where it is the lowest in the group - "here is delivery area for this office" if you wish;</div><div class=""><br class=""></div><div class=""> - combine two TINs into a new one defining a lowest part of surface - "here is our delivery time map".<br class=""><br class="">I understand the maths of this, but how an API for that can look like? Any examples to look at?<br class=""><br class=""><br class=""></div></div>-- <br class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class="">Darafei Praliaskouski<br class="">Support me: <a href="http://patreon.com/komzpa" class="">http://patreon.com/komzpa</a></div></div>
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