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<font face="Calibri">Hello, <br>
<br>
Thanks for your answers. Based on the answers I got, I think we
should distinguish between 3 different related issues: <br>
- <font color="#ff0000"><b>ISSUE 1:</b></font> Get the date if
the imagery provides the information (applies e.g. for Bing, not
for Mapbox) --> Explain how to do this in iD, Potlatch, JOSM or
without editor<br>
- <b><font color="#ff0000">ISSUE 2:</font></b> Get the date if
the imagery does not provide the information (e.g. for MapBox)
--> Ask the data provider to add this information <br>
- <b><font color="#ff0000">ISSUE 3:</font></b> In case the date
of the imagery is provided, deal with the zoom level issue. <br>
<br>
Further details/questions to each issue: <br>
<br>
<b><font color="#ff0000">ISSUE 1: </font></b><b>Get the date if
the imagery provides the information</b><br>
I will try to summarise, based on the answers you sent to my post,
how to find out, given a specific feature (for instance way
58754640) the date of the most recent imagery (in this case Bing)
which was used to draw/validate this feature. Actually, this
describes how to reach the changeset page for the feature, but
from there I still don't know how to get the information I am
looking for. Could you correct/complete this? <br>
<br>
Notice that I don't use Potlatch, so I will limit this post to A)
nothing, B) iD editor and C) JOSM.<br>
<br>
<u>A) Nothing (directly in openstreetmap.org)</u><br>
1) In openstreetmap.org, go to the relevant location -->
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/#map=17/27.70641/85.29392">https://www.openstreetmap.org/#map=17/27.70641/85.29392</a><br>
2) Click on "Layers" (right sidebar) then "Map data" --> each
feature gets a blue line (for ways) or circle (for nodes) around
it<br>
3) Click on the relevant feature (here way 58754640) --> opens
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/way/58754640#map=17/27.70641/85.29446&layers=D">https://www.openstreetmap.org/way/58754640#map=17/27.70641/85.29446&layers=D</a><br>
4) Click on "View history" (link at the bottom of the left
sidebar) --> opens
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/way/58754640/history">https://www.openstreetmap.org/way/58754640/history</a><br>
I can see it was created 5 years ago and last updated 4 months
ago. Then I click on the latest changeset (which I could have done
directly in step 3) --> opens
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/changeset/28154865">https://www.openstreetmap.org/changeset/28154865</a><br>
In the tags I can read "created_by: iD 1.6.2" and
"imagery_used: Bing". <br>
But how can I get the date of the Bing image which was used?? <br>
<br>
<u>B) Using iD editor </u><br>
1) Click on the feature <br>
2) Click on "View on OpenStreetMap.org" in the bottom left -->
opens <a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/way/58754640">https://www.openstreetmap.org/way/58754640</a><br>
This brings me to the same step as A3 above. So the same question
applies. <br>
<br>
<u>C) Using JOSM</u><br>
1) Click on "Download", I select Bounding Box with e.g.
(27.70/27.71 - 85.29/85.30)<br>
2) Click on the way I am interested in (way 58754640)<br>
3) Click on View->History, which opens the window "History for
way 58754640"<br>
Again, I get the same information as in step A4 above. <br>
<br>
So is it the right way to go and how to find the date of the
imagery then?<br>
</font><br>
<font face="Calibri"><font face="Calibri"><b><font color="#ff0000">ISSUE
2: </font></b></font></font><font face="Calibri"><font
face="Calibri"><b><font face="Calibri">Get the date if the
imagery does not provide the information (e.g. for MapBox) </font></b></font><br>
Since MapBox does not provide the date information, would it be
possible to ask MapBox to add this? What would be the way to go to
do this request?<br>
</font><br>
<font face="Calibri"><font face="Calibri"><font face="Calibri"><b><font
color="#ff0000">ISSUE 3: </font></b></font></font></font><font
face="Calibri"><font face="Calibri"><font face="Calibri"><b><font
face="Calibri"><font face="Calibri">In case the date of
the imagery is provided, deal with the zoom level issue</font>
</font></b></font></font><br>
To be honest, I did not really understand the problem here. What I
am asking is the latest date of a single feature, not of an
overall image or area. This is an information I would expect to
find in the changeset of a feature or elsewhere with the data
associated to a feature. Which is not dependent of the zoom level,
right? <br>
<br>
Thanks a lot for your help! <br>
Chris <br>
</font><br>
<div class="moz-cite-prefix">On 02/05/2015 13:29, Pat Tressel wrote:<br>
</div>
<blockquote
cite="mid:CABT-+2qNdXe97mfY7BtkxPP7MJGsjJd4n6RtoCDfz0iiV2F9yA@mail.gmail.com"
type="cite">
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<div>
<div>Nicholas and Andre --<br>
<br>
</div>
Chris is asking about the date of the *imagery* used for
tracing, not the date of the traced elements.<br>
<br>
All --<br>
<br>
He makes an excellent point. If imagery is several years old,
then features being traced may well have changed, with the
likelihood being higher for more ephemeral human-made
structures. For this purpose, would be nice if imagery sets
had metadata that included a creation date, but I'm looking at
the TMS spec, and don't see it, or any field that could be
used for it:<br>
<a moz-do-not-send="true"
href="http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification">http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification</a><br>
<br>
</div>
-- Pat<br>
</div>
</blockquote>
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