Hello Mishari,
I use DJI Phantom 3 Advanced [1]. There is already Phantom 4 which has
got slightly better camera, but a bit shorter flight range. Phantom has
got intelligent flight modes, from which I use the Point of Interest. In
this mode aircraft flies automatically around an object, and it is
impossible to pilot so precisely manually (an example is on the video
below).
There is also DJI Inspire quad but it weighs 2.9 kg (two times more than
Phantom's 1.2 kg). All DJI quads has got a GPS navigation and a GPS
enabled camera, so there will be exact geographical coordinates in
produced JPG images, and an aircraft has got a Return Home feature.
Return Home means that if a pilot lost a quad from the LOS (line of
sight) in the sky, or a radio control signal is lost for some reason, it
still can return and land automatically via this feature. It is an
useful security function.
I would recommend to fly early in the morning on a sunny and quiet day
(see local weather forecast beforehand), as the light is better [2], the
air is clear, but also there are less people and less vehicles on the
streets early in the morning. I usually wait for good weather as long as
it takes for flying in a town or a city.
Also it makes sense to check local regulations [3] (but better from an
official source), and try to follow them as much as possible. As much as
possible, because, for instance, it is allowed normally to fly only in
the LOS mode, but fly-always may happen unintentionally, in this case a
pilot may still return either via FPV (first person view), or Return
Home feature.
[1] http://www.dji.com/product/phantom-3-adv
[2] https://en.wikipedia.org/wiki/Golden_hour_(photography)
[3]
http://www.richardbarrow.com/2015/08/quick-look-at-the-new-and-updated-drone-law-in-thailand/
brgds
O.M.
On 09/08/16 09:55, Mishari Muqbil wrote:
Hello,
I'm just trying to track down a drone provider but I'm not sure if
anyone here has ideas of the kind of specifications I should be asking
for. I assume that it should have a GPS enabled camera and some sort
of path following feature. Anything else?
Thank you everybody for your input so far.
Best regards
Mishari
On Jul 28, 2016 12:29 PM, "Oleksiy Muzalyev"
<oleksiy.muzal...@bluewin.ch <mailto:oleksiy.muzal...@bluewin.ch>> wrote:
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.
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.
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 BFM
<https://en.wikipedia.org/wiki/Basic_fighter_maneuvers> .
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.
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.
[1] https://en.wikipedia.org/wiki/Bilhorod-Dnistrovskyi_fortress
<https://en.wikipedia.org/wiki/Bilhorod-Dnistrovskyi_fortress>
[2] https://youtu.be/C-kQjmzlY7A
On 27/07/16 23:42, hyan...@gmail.com <mailto:hyan...@gmail.com> wrote:
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.
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 indeed
<https://hotosm.org/updates/2016-07-27_introducing_the_mapillary_humanitarian_mapping_kit_in_partnership_with_hot>.
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