[talk-au] Melbourne Airport (mapped as both node and way)

[Ian Sergeant]

I guess I was talking about navigating there by aircraft. For passengers,
sure you'd want a passenger terminal location, and an entrance to the same.

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.

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.

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.

Ian.


On 1 October 2015 at 16:06, Andrew Harvey <andrew.harvey4 at gmail.com> wrote:

> 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.
> On 01/10/2015 2:01 pm, "Ian Sergeant" <inas66+osm at gmail.com> wrote:
>
>> 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.
>>
>> It's a similar issue to admin boundaries, where this issue is addressed
>> with a relation and an admin_centre tag.
>>
>> Ian.
>>
>
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