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    It looks a lot better to me.<br>
    <br>
    <div class="moz-cite-prefix">On 4/18/22 16:52, Martin Davis wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAK2ens1Y6_s53G9c7cy7oUNCa9Zi5paGyxv4tOhBrn=xXBvcmg@mail.gmail.com">
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      <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"
            moz-do-not-send="true" class="moz-txt-link-freetext">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"
            moz-do-not-send="true" class="moz-txt-link-freetext">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:part1.d1AFV9HH.TmzGGpZJ@gmail.com" alt=""
              class=""><br>
            <br>
            [1] <a
              href="https://postgis.net/workshops/postgis-intro/_images/de9im3.jpg"
              target="_blank" moz-do-not-send="true"
              class="moz-txt-link-freetext">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" moz-do-not-send="true"
                    class="moz-txt-link-freetext">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"
                    moz-do-not-send="true" class="moz-txt-link-freetext">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"
                    moz-do-not-send="true" class="moz-txt-link-freetext">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>
                  > _______________________________________________<br>
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