<div dir="ltr">Tackle this a bit on the proposal page, which notes that holding_position as currently formulated has two limitations. First, it's fairly broad. It includes runway holding position markings, ILS critical holding position markings, and interim holding position markings. Each of these markings is used in a different way, and if I were to pull OSM data into a flight simulation environment, the lack of distinction would be a huge problem. Second, it's defined as a node rather than a way, but to be useful, the full hold line (holding position marking) needs to annotated as it can't be assumed that the line is either straight or perpendicular to the taxiway centerline. If the second issue were the only problem, I'd be inclined to just modify the existing tag to include ways (which appears to be used in 20% of all cases anyway). But, if I change the tag to apply only to runway holding position markings, I imagine that would create all sorts of downstream problems. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 28, 2019 at 2:34 PM Mark Wagner <<a href="mailto:mark%2Bosm@carnildo.com">mark+osm@carnildo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">On Thu, 28 Mar 2019 13:27:23 -0400<br>
Steven Estes <<a href="mailto:tapestes@gmail.com" target="_blank">tapestes@gmail.com</a>> wrote:<br>
<br>
> <a href="https://wiki.openstreetmap.org/wiki/Proposed_features/runway_holding_position" rel="noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Proposed_features/runway_holding_position</a><br>
> <br>
> Proposing the addition of runway holding position markings (commonly<br>
> called hold lines). Runway holding position markings are painted<br>
> markings on an airport surface that identify the runway safety area.<br>
> At controlled airports, these markings indicate where an aircraft is<br>
> to stop if the aircraft does not have permission to enter the runway.<br>
> When exiting a runway, an aircraft is not considered clear of that<br>
> runway until all parts of the aircraft have crossed the holding<br>
> position marking. The runway holding position is painted across the<br>
> runway or taxiway and consists of two solid lines on the side that is<br>
> clear of the runway safety area and two dashed lines on the other<br>
> side.<br>
> <br>
> Greatly appreciate any comments folks have.<br>
<br>
How does this differ from aeroway=holding_position<br>
(<a href="https://wiki.openstreetmap.org/wiki/Tag:aeroway%3Dholding_position" rel="noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Tag:aeroway%3Dholding_position</a>),<br>
with 9300 uses<br>
(<a href="https://taginfo.openstreetmap.org/tags/aeroway=holding_position" rel="noreferrer" target="_blank">https://taginfo.openstreetmap.org/tags/aeroway=holding_position</a>)?<br>
<br>
-- <br>
Mark<br>
<br>
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</blockquote></div>