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<div class="moz-cite-prefix">Power poles, wires, wind, trees are
usual dangers for multirotor aircraft too. There is also an issue
of a large bird attack. These risks could be mitigated via sport
flying.<br>
<br>
I usually train sport flying at a stadium very early in the
morning when there no people there. I have got a small trainer
quadcopter, several foldable Air Gates, and Air Flags. There are
also gates at an American football field with high poles, which
are good for learning to fly in narrow spaces.<br>
<br>
I have an impression that birds being excellent fliers themselves
can immediately see the level of piloting skills of a RPAS
(Remotely Piloted Aircraft System) pilot. If they see that it is
an friendly experienced pilot they usually do not attack. In any
case I regularly train diving and other <a
href="https://en.wikipedia.org/wiki/Basic_fighter_maneuvers">BFM</a>
.<br>
<br>
In addition to aerial images I also film aerial video. Video
provides an additional information. For example, recently I filmed
a medieval Bilhorod-Dnistrovskyi fortress [1] in Ukraine. I upload
a video to Wikimedia, add a video link to the Wikidata page, and
add wikidata tag to the OSM map for this object.<br>
<br>
Wikimedia accepts videos only in open OGG and WEBM formats.
Unfortunately, some quality is always lost during conversion to
these formats. You can see the same HD video at youtube and
compare the quality [2]; I tried all convertors which I could find
for Mac.<br>
<br>
[1] <a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Bilhorod-Dnistrovskyi_fortress">https://en.wikipedia.org/wiki/Bilhorod-Dnistrovskyi_fortress</a><br>
[2] <a class="moz-txt-link-freetext" href="https://youtu.be/C-kQjmzlY7A">https://youtu.be/C-kQjmzlY7A</a><br>
<br>
On 27/07/16 23:42, <a class="moz-txt-link-abbreviated" href="mailto:hyances@gmail.com">hyances@gmail.com</a> wrote:<br>
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<div>Yes, ballons and kites is a good community-engaged method;
in my particular case we face problems with the
public-lab-ballon-kit because irregular power poles/wires at a
low height, plus some wind present during the activity, so it
wasn't possible (and a little insecure). Regarding stiching
it was not so easy to deal with 89 pictures using the
MapKnitter (version 1 1/2 years ago), so by the moment aerial
orthophotomosaics software seems to be the option. Another
point regarding ballons is the cost of the helium.<br>
<br>
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<div>About security (and mobile apps) you should consider to
create a previous relationship with the community, so start
with workshops or other activities. In my particualr case for
the replication in other slums in Colombia, the conclution to
my proposal was "not recommended". If your focus is
catastral, ultra-high-res aerial imagery is the better way,
mobile apps can create ancyllary pictures, very useful <a
moz-do-not-send="true"
href="https://hotosm.org/updates/2016-07-27_introducing_the_mapillary_humanitarian_mapping_kit_in_partnership_with_hot">indeed</a>.
<br>
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