<div dir="auto">I would work with ST_startpoint and ST_endpoint</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">A segunda, 9/05/2022, 20:05, Martin Davis <<a href="mailto:mtnclimb@gmail.com">mtnclimb@gmail.com</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">The DE-9IM model isn't able to express line direction.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, May 9, 2022 at 11:42 AM Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com" target="_blank" rel="noreferrer">shishaozhong@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"><div dir="ltr"><div dir="ltr">The DE-9IM pattern string for two lines meeting at both end is found to be FF1F0F1F2.<div><br></div><div>Is it possible for DE-9IM to have a pattern string for end of a line meeting start of another line? Namely, they share a node.</div><div><br></div><div>Regards,</div><div><br></div><div>David</div></div></div>
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