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<DIV><FONT size=2 face=Arial>Likewise happen in hundreds of airstrips in Latin
America, that are out of the ICAO definition of Airport and more into the
Airstrip.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>By definition these airstrip are Not controlled
neither approved by the Aeronautical Authorities but some of them are depicted
in the Aeronautical Visual Charts without data of the Landing Strip
Characteristics...</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=daveswarthout@gmail.com href="mailto:daveswarthout@gmail.com">Dave
Swarthout</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=tagging@openstreetmap.org
href="mailto:tagging@openstreetmap.org">Tag discussion, strategy and related
tools</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, October 09, 2017 9:35
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Tagging] airstrip vs
runway</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>Just to add some observations about Alaska to this conversation.
Alaska has hundreds of long strips whose surface is gravel or grass long ago
cleared of woods and brush that served as landing strips for small airplanes.
The small airplane is almost as common in rural Alaska as automobiles are in
other areas. That's a bit of an exaggeration but as I scan the satellite
imagery I'm constantly amazed at the sheer number of these landing strips that
are scattered here and there. And if one checks the USGS Topo maps as I do
while adding geographical features to Alaska, one can see where airstrips
existed in the past but when inspecting the location with satellite imagery,
no trace of them can be found. Years ago, airplane and airport aficionados
using sources such as "<A href="http://ourairports.com"
target=_blank>ourairports.com</A>", have added hundreds (thousands?) of them
to OSM as though they were actual airports.
<DIV><BR></DIV>
<DIV>I also add an admission that, not being aware of any other tagging or any
need for differentiation as to type, I've mapped dozens of these as runways,
sometimes adding a surface tag, other times not.</DIV>
<DIV><BR></DIV>
<DIV>But they are surely different than one would expect to find at a "real"
airport facility. The more remote variety offer no services, not even fuel,
and are suitable for use by small planes only (bush planes). Many are
abandoned or in need of maintenance. I would not want to give the erroneous
impression that these runways are actually the same sort of beast an
official airport provides.</DIV>
<DIV><BR></DIV>
<DIV>I think therefore that there is a definite need to tag such landing
strips differently.</DIV>
<DIV><BR></DIV>
<DIV>AlaskaDave</DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>
<DIV class=gmail_extra><BR>
<DIV class=gmail_quote>On Mon, Oct 9, 2017 at 7:47 PM, Christoph Hormann <SPAN
dir=ltr><<A href="mailto:osm@imagico.de"
target=_blank>osm@imagico.de</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote><SPAN>On Monday 09 October 2017, Martin Koppenhoefer
wrote:<BR>><BR>> I am not aware that OSM in any way defines what an
“aircraft” is.<BR>><BR>> Why is “aircraft” objective and verifiable,
but “airport” is not?<BR><BR></SPAN>Now discussion is drifting into the
ridiculous.<BR><BR>Depending on your perspective it can obviously be
considered inherently<BR>impossible to fully define the meaning of every
word of a language<BR>using just words of this language. The purpose
of verbal definitions<BR>is to create a consistent framework of
interrelationships between the<BR>words that allows you to interpret them in
a way that is consistent<BR>with other users of the language and identify
misinterpretations<BR>because they create inconsistencies.<BR><BR>You used
the term 'airport' in a segregative way, i.e. to distinguish<BR>between
runway-like features on an airport and runway-like features on<BR>a
non-airport. The use of the term 'aircraft' is merely
descriptive.<BR>It does not not aim to distinguish runways from non-runways
(runway<BR>tagging according to the definition for example can be equally
used for<BR>runways for manned and unmanned aircrafts).<BR><BR>So even if
you have no real idea what an aircraft is you will probably<BR>be able to
mostly map runways correctly based on that definition using<BR>your
understanding of the terms 'air' and 'craft'.<BR><BR>And in general you
should as much as possible be able to decide on tags<BR>based on *local*
observations. If the same runway-like feature needs<BR>to be tagged
differently depending on if it is located within an<BR>airport of not (by
whatever definition of airport) that is not a very<BR>good idea for
tagging. A mapper is for example very likely able to<BR>reliably
identify a "strip of land on which aircraft can take off and<BR>land" from
high resolution imagery but specific classification of the<BR>area this
strip is located in can be much less reliable.<BR><SPAN
class="m_-3849479211850525536im m_-3849479211850525536HOEnZb"><BR>--<BR>Christoph
Hormann<BR><A href="http://www.imagico.de/" rel=noreferrer
target=_blank>http://www.imagico.de/</A><BR><BR></SPAN>
<DIV class=m_-3849479211850525536HOEnZb>
<DIV
class=m_-3849479211850525536h5>______________________________<WBR>_________________<BR>Tagging
mailing list<BR><A href="mailto:Tagging@openstreetmap.org"
target=_blank>Tagging@openstreetmap.org</A><BR><A
href="https://lists.openstreetmap.org/listinfo/tagging" rel=noreferrer
target=_blank>https://lists.openstreetmap.or<WBR>g/listinfo/tagging</A><BR></DIV></DIV></BLOCKQUOTE></DIV><BR><BR
clear=all>
<DIV><BR></DIV>-- <BR>
<DIV class=m_-3849479211850525536gmail_signature
data-smartmail="gmail_signature">
<DIV dir=ltr>Dave Swarthout<BR>Homer, Alaska<BR>Chiang Mai, Thailand<BR>Travel
Blog at <A href="http://dswarthout.blogspot.com"
target=_blank>http://dswarthout.blogspot.com</A></DIV></DIV></DIV></DIV>
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