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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"
type="cite">
<div dir="ltr">
<div>
<div><br>
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<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>
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<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"
type="cite">
<div dir="ltr">
<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>
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<div>
<div>
<div>Ian.<br>
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<div><br>
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<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
solid;padding-left:1ex">
<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">
<blockquote class="gmail_quote"
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>
</div>
<div><br>
</div>
<div>Ian.</div>
</div>
</div>
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