<div dir="ltr"><div dir="ltr"><div dir="ltr">Hi, Phil,<div><br></div><div>Have a read of the article - A Novel Robust Approach for Computing DE-9IM Matrices</div><div>Based on Space Partition and Integer Coordinates,</div><div><br></div><div><p class="MsoNormal">Please look at Figure 12 and Table 5. I have trying to find more information on these.<span></span></p><p class="MsoNormal"><br></p><p class="MsoNormal">What are presented in Figure 12 and Table 5 can lead to a widespread realisation of what uses and applications can be made.</p><p class="MsoNormal"><br></p><p class="MsoNormal">The detailed background working will not, as it may well be beyond most people's imagination and understanding.</p><p class="MsoNormal"><br></p><p class="MsoNormal">Regards,</p><p class="MsoNormal"><br></p><p class="MsoNormal">David</p></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 30 Mar 2022 at 08:56, Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com">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">Hi, Phil,<div><br></div><div>Thanks.</div><div><br></div><div>I am thinking of their applications. It appears that these are useful in the context of testing data and finding errors to start with.</div><div><br></div><div>There appear not yet much literature on the practical applications of these.</div><div><br></div><div>Regards,</div><div><br></div><div>David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 29 Mar 2022 at 23:24, Phil Bartie <<a href="mailto:philbartie@gmail.com" target="_blank">philbartie@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">Hi David,<div><br></div><div>There are a large number (6561) of theoretical possible relationships between 2 features which can be expressed by DE-9IM. Not sure what you mean by 'type of errors', but from what I understand the DE-9IM is a mathematically complete set of all options for how 2 features can interact. </div><div><div><br></div><div>As well as the wiki page Martin mentioned there's also some examples here: <a href="https://docs.tatukgis.com/DK11/doc:de9im" target="_blank">https://docs.tatukgis.com/DK11/doc:de9im</a></div><div>These slides are quite useful too for some more background - <a href="https://event.cwi.nl/eswc2015-geo/02-background.pdf" target="_blank">https://event.cwi.nl/eswc2015-geo/02-background.pdf</a> - check slides 14 to 20.<br></div><div><br></div><div>A key paper from Clementini et al on the theory behind all this is: <a href="http://delab.csd.auth.gr/~alex/sdb/artSSD93.pdf" target="_blank">http://delab.csd.auth.gr/~alex/sdb/artSSD93.pdf</a> </div><div><br></div><div>best<br></div></div><div>Phil</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 29 Mar 2022 at 22:43, Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com" target="_blank">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">I saw that one, but could not find a table of DE-9IM, type of intersection, type of errors.<div><br></div><div>Some may not be errors. </div><div><br></div><div>It will nice to get hold of a confirmed table.</div><div><br></div><div>Regards,</div><div><br></div><div>David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 29 Mar 2022 at 22:03, Martin Davis <<a href="mailto:mtnclimb@gmail.com" target="_blank">mtnclimb@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">The first thing that shows up on a web search is a good resource:<div><br></div><div><a href="https://en.wikipedia.org/wiki/DE-9IM" target="_blank">https://en.wikipedia.org/wiki/DE-9IM</a><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Mar 29, 2022 at 1:27 PM Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com" target="_blank">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">Where a full list of DE-9IM pattern can be found for ST_Relate?<br></div><div dir="ltr"><br></div><div>Regards,</div><div><br></div><div>David</div></div>
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