Martins example that the "<span class="Apple-style-span" style="font-family: Arial; ">Faroe Islands have 1 small airport/aerodrome with 1 short runway (1250m) with few small buildings in the whole country" shows that just because an airport is small doesn't mean it isn't important. </span><div>
<span class="Apple-style-span" style="font-family: Arial; "><br></span></div><div><span class="Apple-style-span" style="font-family: Arial; "></span><span class="Apple-style-span" style="font-family: Arial; ">Compare the number of airports rendered at Mapnik zoom 10 in the <a href="http://www.openstreetmap.org/?lat=42.032&lon=-88.238&zoom=10&layers=B000FTF">greater Chicago area</a> to the number of airports at the same zoom when looking at the <a href="http://www.openstreetmap.org/?lat=62.159&lon=-6.902&zoom=10&layers=B000FTF">Faroe Islands</a> both at zoom 10. In my opinion the Faroe Islands map is very user friendly, showing the one airport in the area. The Chicago map on the other hand is very cluttered with more airports than I can count, and two most important ones (Midway & O'Hare) are drowned out by all the others. Ideally I would say that the Vagar Airport in Farhoe should render with the same prominence as Midway and O'Hare in Chicago. O'Hare is much, much bigger but Vagar is the only airport in the entire country. To a person looking at a map of each area, they should have the same importance -- they are each the biggest airport in their respective areas. Many of the other airports in the Chicago area may be of a similar size to Vagar Airport, but they should render with much less prominence since there are much bigger, more important airports near by. </span></div>
<div><span class="Apple-style-span" style="font-family: Arial; "><br></span></div><div><span class="Apple-style-span" style="font-family: Arial; ">This is similar to the concept that the definition of highway=primary can vary greatly depending on the area of the world you are looking at. I'm not sure how we can use things like runway length, size of airport polygon, or annual air traffic to calculate this kind of relative importance. In my opinion it really requires the input of a local mapper. Thoughts?</span></div>
<div><font class="Apple-style-span" face="Arial"><br></font></div><div><font class="Apple-style-span" face="Arial">Zeke</font></div><div><font class="Apple-style-span" face="Arial"><br></font></div><div><font class="Apple-style-span" face="Arial"><br>
</font><div><br><div class="gmail_quote">On Tue, Jun 15, 2010 at 12:07 AM, Martin Fossdal Guttesen <span dir="ltr"><<a href="mailto:mguttesen@hotmail.com">mguttesen@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div style="padding-left:10px;padding-right:10px;padding-top:15px" name="Compose message area">
<div><font size="2" face="Arial">What about this example<br>62.06, -7.27 (sorry cant
get the link, <a href="http://openstreetmap.org" target="_blank">openstreetmap.org</a> is down)<br><br>it is in Faroe Islands, we
only have 1 small airport/aerodrome with 1 short runway (1250m) with few
small buildings in the hole country</font><br></div>
<div style="font:10pt Tahoma">
<div><br></div>
<div style="background:#f5f5f5">
<div><b>From:</b> <a title="mailto:ezekielf@gmail.com
CTRL + Click to follow link" href="mailto:ezekielf@gmail.com" target="_blank">Zeke Farwell</a> </div>
<div><b>Sent:</b> Tuesday, June 15, 2010 4:33 AM</div>
<div><b>To:</b> <a title="mailto:tagging@openstreetmap.org
CTRL + Click to follow link" href="mailto:tagging@openstreetmap.org" target="_blank">Tag discussion, strategy and related
tools</a> ; <a title="mailto:talk-us@openstreetmap.org
CTRL + Click to follow link" href="mailto:talk-us@openstreetmap.org" target="_blank">talk-us</a> </div><div class="im">
<div><b>Subject:</b> Re: [Tagging] Aeroway=Aerodrome Modifier
Tags?</div></div></div></div>
<div><br></div><div><div></div><div class="h5">
<div>Steve,</div>
<div><br></div>I like this as a possible solution as well. Perhaps the
admin_level tag could be used? Same as for boundaries. The
challenges in my eyes are not making the tagging scheme overly complicated, and
making if verifiable based on physical characteristics. In my opinion OSM
only needs three levels max, and maybe two would do it.
<div>
<ul>
<li>One would encompass all commercial passenger airports from small to
gigantic. Generally even smaller airports are fairly well spaced out,
except in very large metropolitan areas where there may be more than one
(Chicago has O'Hare and Midway), so these could be rendered at a high zoom
level.
</li><li>Another level would encompass minor aerodromes and airfields that don't
serve commercial passenger flights but are more than a simple landing strip.
They have some buildings and are still sizeable. These could
probably be rendered at one or two levels lower.
</li><li>A third level would be only for the most basic aerodromes. Basic
runways or landing strips with only very small buildings if any. These
would only be of local interest and should be rendered at a relatively low
zoom only. </li></ul>
<div>We could certainly call these levels 1, 2, and 3 instead of Airport,
Airfield, and Landing Strip. I'm just sick of seeing lots of extremely
minor landing strips rendered at the same importance as O'Hare International
Airport at zoom 15 on the map. Do you think more than three levels are
needed? Maybe just two: Large and Small. </div>
<div><br></div>
<div>Zeke</div>
<div><br></div>
<div><br><br>
<div class="gmail_quote">On Mon, Jun 14, 2010 at 10:56 PM, Steve Bennett <span dir="ltr"><<a href="mailto:stevagewp@gmail.com" target="_blank">stevagewp@gmail.com</a>></span> wrote:<br>
<blockquote style="border-left:#ccc 1px solid;margin:0px 0px 0px 0.8ex;padding-left:1ex" class="gmail_quote">
<div><br></div>IMHO, if the only distinction between them
is<br>size/importance/hierarchy, then it just creates pain and confusion
to<br>create all these extra words, particularly for non-english
speakers.<br>Why
not:<br><br>aeroway=aerodrome<br>importance=1<br>importance=2<br>etc.<br><br>Make
5 intercontinental airports and 1 tiny amateur airfields. This<br>also avoids
the problem when Podunck Airfield is actually an<br>international airport (yet
"aerodrome=airfield" seems more intuitive),<br>and removes a whole bunch of
subjective issues to do with the<br>connotations of each name.<br><font color="#888888"><br>Steve<br></font>
<div>
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