<div dir="ltr"><br><div class="gmail_extra">On Wed, Apr 17, 2013 at 2:33 AM, André Pirard <span dir="ltr"><<a href="mailto:A.Pirard.Papou@gmail.com" target="_blank">A.Pirard.Papou@gmail.com</a>></span> wrote:<br><div class="gmail_quote">
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    From OSM-talk-be, with best regards.  I put the questions before the
    replies ;-)<br>
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                  <div>On Sun, Apr 14, 2013 at 2:31 PM, André
                    Pirard <span dir="ltr"><<a href="mailto:A.Pirard.Papou@gmail.com" target="_blank">A.Pirard.Papou@gmail.com</a>></span>
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                        <div>On 2013-04-13 23:02, Marc Gemis wrote :<br>
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                          <div dir="ltr">... [ <a href="http://lists.openstreetmap.org/pipermail/talk-be/attachments/20130413/9baee2b4/attachment.html" target="_blank">full
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                              <div><font face="arial, sans-serif">So why
                                  two lines for an abandoned railway and
                                  the cycleway/footway on it ? Can't
                                  they be combined ?</font></div>
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                        What to do is explained in the OSM wiki at ... <a href="http://wiki.openstreetmap.org/wiki/Railways" target="_blank">Railways</a><br>
                        <blockquote type="cite">Abandoned - The track
                          has been removed and the line may have been
                          reused or left to decay but is still clearly
                          visible, either from the replacement
                          infrastructure, or purely from a line of trees
                          around an original cutting or embankment. Use
                          <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:railway" title="Key:railway" target="_blank">railway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:railway%3Dabandoned" title="Tag:railway=abandoned" target="_blank">abandoned</a></tt>. Where
                          it has been reused as a cycle path then add <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:highway" title="Key:highway" target="_blank">highway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:highway%3Dcycleway" title="Tag:highway=cycleway" target="_blank">cycleway</a></tt>.
                          Consider adding a <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:end_date" title="Key:end date" target="_blank">end_date</a>=*</tt>
                          tag or more specifically a <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/w/index.php?title=Key:railway:end_date&action=edit&redlink=1" title="Key:railway:end date (page does not
                              exist)" target="_blank">railway:end_date</a>=*</tt>
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                        On Sun, Apr 14, 2013 at 9:03 PM, Marc Gemis <span dir="ltr"><<a href="mailto:marc.gemis@gmail.com" target="_blank">marc.gemis@gmail.com</a>></span>
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                          <div dir="ltr">This means that the separate
                            track should be removed for the 3 cases I
                            listed, or not ?</div>
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                        <div>On 2013-04-14
                          23:11, Ben Laenen wrote :<br>
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                            <div>No, highway and cycleway should not
                              share any ways. The only thing which may
                              be acceptable is reusing the same nodes
                              for two different ways, but only if they
                              are on exactly the same location, which is
                              actually quite rare. In quite a lot of
                              cases there will be an offset, or it will
                              diverge a little bit from the original
                              railway track.<br>
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                            Ben<br>
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                <div text="#000000" bgcolor="#FFFFFF">IMVHO, there is no
                  railway if there are no rails, just a cycleway, just
                  one way.<br>
                  And the intention may be to add information that there
                  <b>was</b><b></b> a railway there, the genesis.<br>
                  How then explain the wiki rules: "<tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:railway" title="Key:railway" target="_blank">railway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:railway%3Dabandoned" title="Tag:railway=abandoned" target="_blank">abandoned</a></tt>"
                  and "add <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:highway" title="Key:highway" target="_blank">highway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:highway%3Dcycleway" title="Tag:highway=cycleway" target="_blank">cycleway</a></tt>
                  to <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:railway" title="Key:railway" target="_blank">railway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:railway%3Dabandoned" title="Tag:railway=abandoned" target="_blank">abandoned</a></tt>"
                  instead of "add ...???... to <tt style="background-color:rgb(224,224,240);white-space:pre-wrap" dir="ltr"><a href="http://wiki.openstreetmap.org/wiki/Key:highway" title="Key:highway" target="_blank">highway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:highway%3Dcycleway" title="Tag:highway=cycleway" target="_blank">cycleway</a></tt>"?<br>
</div></div></div></div></div></div></div></div></blockquote><div><br></div><div>Hi. I have a bit of an interest in rail trails. For those not well versed in them, these are where an old train line has been decommissioned, the rails have been pulled up, and a bike path runs where the trains used to. Usually the bike path has to diverge from the original alignment at certain points, where the land has been sold, or there's a bridge missing or something.<br>
<br></div><div>So, there are few options for tagging:<br><br></div><div>1) A single way: "railway=abandoned | highway=cycleway | name=Blah Rail Trail | surface=unpaved" (usually with a cycle route relation as well)<br>
</div><div>Advantages:<br></div><div>-  easy, can quickly convert a mapped train line into a rail trail<br></div><div>- preserves the relationship between bike path and train line (eg, it's easy for a data consumer to pull out ways that are rail trails)<br>
</div><div>- can use this information for rendering (eg, show the bike path in a special way when it's a rail trail, and don't render the train line directly)<br></div><div><br></div><div>Disadvantages<br></div><div>
- tag clashes, particularly "name=" - is this the name of the bike path, or of the former train line?<br><br></div><div>2) Two ways, not sharing nodes<br></div><div>Advantages:<br></div><div>- keep information separate, retain everything about the train line<br>
</div><div>Disadvantages:<br></div><div>- messy for editing, rendering<br><br></div><div>3 Two ways, sharing nodes<br></div><div>Advantages:<br></div><div>- "clean", most precise<br></div><div>Disadvantages:<br>
</div><div>- really bad for editing (hard to select between multiple colinear ways)<br>- really bad for rendering (totally unpredictable which of the two ways will show, maybe they both will and will look terrible)<br><br>
</div><div>Steve<br></div></div></div></div>