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    <div class="moz-cite-prefix">On 1/10/2015 4:50 PM, Ian Sergeant
      wrote:<br>
    </div>
    <blockquote
cite="mid:CALDa4Y+2CRP56owUdGzS6Fr38ys21zSNyn2cvqV34RPuC08gMg@mail.gmail.com"
      type="cite">
      <div dir="ltr">I guess I was talking about navigating there by
        aircraft.</div>
    </blockquote>
    A 'point' calculated for an aerodrome area would be good enough
    until you had to select a runway .. where you would want the end
    points of the runway .. not the node of the aerodrome (most of them
    look to be place on/near the main building anyway). <br>
    <blockquote
cite="mid:CALDa4Y+2CRP56owUdGzS6Fr38ys21zSNyn2cvqV34RPuC08gMg@mail.gmail.com"
      type="cite">
      <div dir="ltr"> For passengers, sure you'd want a passenger
        terminal location, and an entrance to the same.
        <div><br>
        </div>
        <div>Ultimately, regardless of what form of transport you use,
          you are going to be navigating to a point. The question is
          there an automated algorithm that can calculate a reasonable
          point, or does this need to be placed manually.  It seems not
          for passengers.  I'd argue there probably isn't in general.</div>
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    Agreed. <br>
    A person will (should that be a 'reasonable person'?) use their eyes
    to look for what they want .. not just follow the GPS thus any
    discrepancies of, say, 100 meters should not matter too much as the
    vision should direct them to the correct place.<br>
    One hopes the aircraft pilot has even more motive to use there
    senses to get to the correct place! They certainly have a better
    view of things. <br>
    <blockquote
cite="mid:CALDa4Y+2CRP56owUdGzS6Fr38ys21zSNyn2cvqV34RPuC08gMg@mail.gmail.com"
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        <div>
          <div><br>
          </div>
          <div>For Sydney Airport, they have just opened up all that
            land on the other side of the canal - and the runways
            themselves extend way into the bay.  It's complicated to
            calculate a reasonable point.</div>
        </div>
      </div>
    </blockquote>
    <br>
    But if you are landing at a major airport .. you won't be using a
    GPS .... certainly not alone!<br>
    <blockquote
cite="mid:CALDa4Y+2CRP56owUdGzS6Fr38ys21zSNyn2cvqV34RPuC08gMg@mail.gmail.com"
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        <div>
          <div><br>
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          <div>So, I do see it as roughly equivalent to the
            boundary/admin_centre.  Where a basic centre of gravity
            algorithm works to convert a way to a node, then you
            probably don't need a node.  Like a building.  Where this
            type of algorithm doesn't produce a reasonable point, then I
            think we should at least have the possibility of placing a
            point manually.</div>
          <div><br>
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              <div>Ian.<br>
              </div>
              <div><br>
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              <div>
                <div>
                  <div>
                    <div class="gmail_extra"><br>
                      <div class="gmail_quote">On 1 October 2015 at
                        16:06, Andrew Harvey <span dir="ltr"><<a
                            moz-do-not-send="true"
                            href="mailto:andrew.harvey4@gmail.com"
                            target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:andrew.harvey4@gmail.com">andrew.harvey4@gmail.com</a></a>></span>
                        wrote:<br>
                        <blockquote class="gmail_quote" style="margin:0
                          0 0 .8ex;border-left:1px #ccc
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                          <p dir="ltr">When travelling to an airport,
                            you normally travel to a terminal which are
                            separately mapped, ideally with an
                            entrance=main. Where would you put this
                            point at say Sydney where international and
                            domestic are on opposite sides? I think it's
                            not the same as admin_center for admin
                            boundaries. </p>
                          <div>
                            <div>
                              <div class="gmail_quote">On 01/10/2015
                                2:01 pm, "Ian Sergeant" <<a
                                  moz-do-not-send="true"
                                  href="mailto:inas66%2Bosm@gmail.com"
                                  target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:inas66+osm@gmail.com">inas66+osm@gmail.com</a></a>>
                                wrote:<br type="attribution">
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                                  style="margin:0 0 0
                                  .8ex;border-left:1px #ccc
                                  solid;padding-left:1ex">
                                  <div dir="ltr">
                                    <div>Certainly when navigating to an
                                      airport, you need a 'point' to
                                      navigate to.  An calculation of a
                                      valid airport point from a airport
                                      boundary that may often include
                                      industrial parks, etc, is
                                      problematic - verging on
                                      intractable.  Having this point
                                      500m off significantly breaks
                                      stuff.<br>
                                    </div>
                                    <div>
                                      <div><br>
                                      </div>
                                      <div>
                                        <div>It's a similar issue to
                                          admin boundaries, where this
                                          issue is addressed with a
                                          relation and an admin_centre
                                          tag.  <br>
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                                        </div>
                                        <div>Ian.</div>
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