[OSM-talk] a sample panoramic aerial image for 3D mapping made with the new DJI Spark quad-copter
Darafei "Komяpa" Praliaskouski
me at komzpa.net
Sat Sep 2 07:38:12 UTC 2017
We're using DJI Mavic ($1000), Pix4D Capture application and Pix4D
($300/mo) to get orthorectified imagery in Belarus. It takes 1 battery, 20
minutes of flight time and several hours processing to get 1x1 km chunk in
DSM and 3D is also generated.
We upload it to OpenAerialMap. There are some issues in their pipeline that
make imagery not very crisp:
пт, 1 сент. 2017 г. в 18:42, Oleksiy Muzalyev <oleksiy.muzalyev at bluewin.ch>:
> On 9/1/2017 5:12 PM, Martin Koppenhoefer wrote:
> 2017-09-01 16:24 GMT+02:00 Oleksiy Muzalyev <oleksiy.muzalyev at bluewin.ch>:
>> But the advantage is that it weighs only 300 grams, very portable, and it
>> is ready to fly almost instantly as folding propellers are fixed
>> permanently, and smart-phone connects to the remote control via WiFi, no
>> cables are necessary.
> did you try how high/far you can get before loosing the wifi connection?
> Hello Martin and James,
> In this case was talking about Wi-Fi connection between smart-phone where
> runs DJI Go 4 app and the remote control radio, they remain close to one
> another all the time. But certainly the flight range of Spark is not as
> great as the one of the Phantom.
> There is a list of compatible smart-phones for the Spark at the very
> bottom of this page: http://www.dji.com/spark/info#specs . I read at the
> DJI forum that if one uses such a smart-phone the range is better.
> I flew Spark maximum about 700 meters away and 150 (legal limit for the
> region) meters high. The video & control signals was present all the time,
> though my old smart-phone is not in the list. I ordered already a
> compatible one.
> For me this range is OK. The best aerial photos are made from the altitude
> of 70 - 100 meters anyway, and besides in accordance with the regulations
> it is allowed to fly only LoS (line-of-sight) anyway (unless there is a
> special license).
> The Spark remote controller has got folding outside antennas, so the range
> of several hundred meters, or I would guess up to 1 - 1.2 km, is probably
> due to these antennas. The range of the Phantom is more than 2 km.
> Best regards,
> talk mailing list
> talk at openstreetmap.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the talk