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<div class="moz-cite-prefix">Hi Nick,<br>
<br>
the recommended GraphHopper-way is to prepare graphhopper files
for an area and setup a server which hosts that files. Another
more developer-intense approach would be to have the complete
graph already loaded and then create such 10x10km slices
on-demand. Personally I would suggest to avoid triggering Overpass
API for such bulk requests or setup your own servers with that
API.<br>
<br>
What I do not understand: if the user has online access why would
you need the full graphhopper files on the device? Why not use
e.g. our Directions API or host your own graphhopper server? This
way the user just needs a very small path to download and you
avoid hitting the Overpass API.<br>
<br>
Regards,<br>
Peter<br>
<br>
On 16.04.2015 20:22, Nick Whitelegg wrote:<br>
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<blockquote cite="mid:1429208545721.34339@solent.ac.uk" type="cite">
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<p>Hi,</p>
<p><br>
</p>
<p>As a few of you might know I am developing an augmented
reality hikers' app for Android. As part of this I would like
to develop route finding (including AR signposts) facilities,
using GraphHopper.</p>
<p><br>
</p>
<p>However I don't want users to have to download a huge OSM or
GraphHopper file covering the whole of England and Wales: I
would prefer users to download small tiles of OSM data (say
10km x 10km) of their local area, which could then be cached
on their device. The conversion to GraphHopper format could be
done on the device.<br>
</p>
<p><br>
</p>
<p>Overpass seems good for this: the usage policy suggests up to
10000 hits/day is acceptable. I can't see more than a small
number of people using the app for now: furthermore I could
route requests through a proxy on my own server which ensures
that no more than 5000 (to be safe) requests to Overpass per
day are made.</p>
<p><br>
</p>
<p>Does this sound an acceptable use of the Overpass API?</p>
<p><br>
</p>
<p>Thanks,</p>
<p>Nick<br>
</p>
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<br>
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