<div dir="ltr">Good to hear. I did run it through an online color accessibility checker, so I guess that has worked out.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 18, 2022 at 7:20 PM Jim Klassen <<a href="mailto:klassen.js@gmail.com">klassen.js@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>
It looks a lot better to me.<br>
<br>
<div>On 4/18/22 16:52, Martin Davis wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Is this any better?
<div><br>
</div>
<div><a href="https://postgis.net/docs/manual-dev/using_postgis_query.html#DE-9IM" target="_blank">https://postgis.net/docs/manual-dev/using_postgis_query.html#DE-9IM</a><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Apr 18, 2022 at 2:31
PM Jim Klassen <<a href="mailto:klassen.js@gmail.com" target="_blank">klassen.js@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> As an aside, I am noticing these graphics probably
aren't very accessible to people with vision impairments.
There is a lack of meaningful alt-text, a general
fuzziness/soft edges, and use of several colors of similar
lightness. In particular, the red is hard to separate out
in grayscale and the red is the part that is most important
as it is describing the part of the image that applies to
that grid cell.<br>
<br>
I'm not sure if it will come through on the list, but I've
converted the 3x3 grid image from [1] to grayscale below as
an example. I know I'd have a very hard time picking out
which section was what if I didn't already know the answer
ahead of time.<br>
<br>
<img src="cid:1803fbdc30d1ab77e641" alt=""><br>
<br>
[1] <a href="https://postgis.net/workshops/postgis-intro/_images/de9im3.jpg" target="_blank">https://postgis.net/workshops/postgis-intro/_images/de9im3.jpg</a><br>
<br>
<div>On 4/15/22 15:08, Shaozhong SHI wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">This is very interesting.
<div><br>
</div>
<div>However, this needs to be further detailed with a
table to explain a variety of cases and uses.</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 Fri, 15 Apr 2022 at
02:48, Paul Ramsey <<a href="mailto:pramsey@cleverelephant.ca" target="_blank">pramsey@cleverelephant.ca</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"><a href="https://postgis.net/workshops/postgis-intro/de9im.html" rel="noreferrer" target="_blank">https://postgis.net/workshops/postgis-intro/de9im.html</a><br>
<br>
> On Apr 14, 2022, at 4:35 PM, Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com" target="_blank">shishaozhong@gmail.com</a>>
wrote:<br>
> <br>
> The use of ST_Relate appears very attractive.
However, there appears not yet a table detailing
DE_9IE patterns and types of topological relations.<br>
> <br>
> There also appears that not much literature on
the use of it for data quality assurance or things
like deriving quality data from raw data.<br>
> <br>
> Can anyone enlighten me?<br>
> <br>
> Regards,<br>
> <br>
> David<br>
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