DJI is a Chinese tech giant dominating the consumer drone market. The Phantom 4 RTK multicopter is their answer to the professional mapping drone segment. Wingtra is a Swiss-based professional drone company that is focused solely on its high-accuracy survey and mapping VTOL drone WingtraOne. Here is your summary followed by the ultimate long-read comparison of the drones.
The summary: Multirotor vs. VTOL
Although they are both marketed as survey and mapping drones, WingtraOne and Phantom 4 RTK have little in common. As a VTOL drone, the WingtraOne is a hybrid between a fixed-wing and a multirotor. It lifts off and lands vertically, but for flight it transitions into a fixed-wing mode. Phantom 4 RTK is a typical multirotor, which behaves in the air like a helicopter. Because of this fundamental difference, WingtraOne delivers much broader coverage required by the majority of mapping projects, while multirotors like Phantom 4 RTK can only cover limited areas. In fact, according to our test flights for coverage, on a full battery, WingtraOne can cover almost 14 times more than Phantom 4 RTK at the same 1.2 cm (0.5 in)/px GSD. Phantom 4 RTK covered 8 ha (20 ac) and the WingtraOne covered 110 ha (272 ac) in one flight.
1 flight coverage at 1.2 cm (0.5 in)/px GSD
Results from our test flights at 1.2 cm (0.5 in)/px GSD reveal almost 14x the coverage for WingtraOne with its RX1R II payload option, vs. DJI’s Phantom 4 RTK with its built in payload.
Beyond coverage, WingtraOne outranks the Phantom 4 RTK in terms of image resolution that later determines absolute accuracy measures as well. With its flagship Sony RX1R II 42 MP payload, WingtraOne can achieve more than twice the image resolution as the Phantom 4 RTK. Higher image resolution equals better map quality, which defines the quality of the entire project.
Here is the test image comparison of the best possible GSD for WingtraOne’s RX1R II payload and Phantom 4 RTK’s fixed payload:
Test images at the lowest possible GSD of each drone. The 42MP full-frame sensor of the WingtraOne pays off with more than three times lower GSD and striking resolution lines** for the RX1R II. You can easily compare these lines by looking at the center of the Siemens Stars, which show the degree of clarity or blur. More test images at the same altitude and same GSD are below in the test image section. Note: all coverage figures in this report are theoretical and calculated based on listed coverage unless we list them as tested.
*In theory, Phantom 4 RTK would be able to achieve lower GSDs, however, at the location we conducted the tests, the environment did not allow us to fly lower than 65 m (213 ft), hence the “best GSD” in this situation is 1.8 cm (0.7 in)px.
**Real resolution for all images is based on measurements of the fine-lined Siemens Star, which reduces measurement errors.
If you need reliably high image quality and accuracy on medium to large-scale survey and mapping projects across industries, go for the WingtraOne. If you are on a tight budget and need an entry-level drone for smaller projects with reasonable resolution and absolute accuracy, the Phantom 4 RTK is worth a closer look. If you are new to drones, you can do what many people do and get this entry-level solution as a proof-of-concept for basic project needs. When you need to cover more area with better-quality images, you can switch to a more expensive system.
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