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<div class="moz-cite-prefix">On 4/30/15 7:45 AM, SK53 wrote:<br>
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<div>Hi Richard,<br>
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I've always presumed that you would create different
ways for surface=clay, surface=asphalt with
appropriate time intervals. This gets potentially
very messy for city streets which may go
surface=dirt =>gravel
=>compacted=>cobblestone=>asphalt along
with changes in lighting, width, lanes etc. (Not to
mention names). I deliberately avoided this type of
issue when I looked at <a moz-do-not-send="true"
href="http://sk53-osm.blogspot.co.uk/2014/05/editing-historical-road-layouts.html">Derby
Road as an example</a>.<br>
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These changes are far more frequent than the actual
geometry of the way.<br>
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given shared geometries, one could argue that we<br>
should share nodes between the ways. i usually avoid<br>
that in OSM but in this case it seems appropriate.<br>
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JOSM can support selecting one of the the stacked ways,<br>
but it's still obnoxious. still, it might do for now.<br>
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With respect to dates, I like the stuff suggested by
Trevor.<br>
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don't think i've seen that. pointer or link?<br>
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<div>Last thought would be: Would it be feasible to introduce
some feature to support temporal queries in the Overpass
stack?<br>
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by temporal queries do you mean date ranges and before/after on tags<br>
containing dates? probably, but i haven't looked at the actual
overpass<br>
code yet so i don't have any way of assessing difficulty. i can add
it to the list.<br>
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<div dir="ltr">PS. This is worth mentioning in your talk to show
that examples are the way to discover issues/ways of doing
things.<br>
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i was planning on discussing things that have been exposed that<br>
we don't know how to do yet and potential approaches.<br>
<br>
richard<br>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-abbreviated" href="mailto:rwelty@averillpark.net">rwelty@averillpark.net</a>
Averill Park Networking - GIS & IT Consulting
OpenStreetMap - PostgreSQL - Linux
Java - Web Applications - Search</pre>
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