The above is the analysis of the factors that affect the accuracy of industrial drone aerial surveys. While drone aerial surveys bring various conveniences to field work, field surveys also have certain requirements. Collected by MMC:www.mmcuav.com

1. Analysis of Factors Affecting the Precision of Aerial Survey of Industrial
UAV
Analysis of factors affecting the accuracy of aerial surveying of industrial
drones. With the development of surveying and mapping, new
technologies are slowly replacing traditional surveying and mapping
methods. At the same time, it has brought a huge change to the
surveying and mapping workers. The most notable one is the drone
mapping technology that has only recently emerged in recent years.
Surveying and mapping drones are characterized by maneuverability,
flexibility, efficiency, speed, precision and accuracy, low operation cost,
wide application range, and short production cycle.
In the process of mapping, drones will also have a lot of external factors
that have a great impact on the accuracy of the data. While using new
technology, we must also avoid the impact of these external factors on
the results. What are the factors that affect the accuracy of drone aerial
surveys?
1.A layout of image control points
The layout of the image control points plays a key role in the later
mapping. At least 5 phase control points are required for each sort. If the
terrain changes are relatively large, image control points need to be
encrypted even in areas with complex numbers and vegetation. If it is
not encrypted or the distribution is not uniform enough to cover the

2. flight area, it will cause warpage and the adjustment data will not meet
the accuracy requirements. .
The factors that affect image quality are divided into weather factors and
camera factors; weather factors are mainly wind and haze. When the
wind speed is too high (generally, the control point distribution error
situation does not exceed level 5), you should consider stopping the
flight. The wind assembly caused excessive changes in the aircraft's flight
speed and attitude, resulting in excessive distortion of the photos taken
from the air, and the final image was blurred. At the same time, the
kinetic energy consumption of the aircraft will be accelerated, resulting
in shortened flight time, and eventually the planned area may not be
completed within a limited time.
The camera's own factors are mainly the camera's pixels and exposure
time. The pixels are mainly determined by the camera itself. The exposure
time selection has a close relationship with the weather. When the light
conditions are not good, you should increase the exposure time as much
as possible. The two exposure times are taken separately and compared
by the camera's ISO value. The smaller the ISO value, the better the
quality of the photo, so choose the exposure time corresponding to the
photo with a smaller ISO value.
3. Overlapping rate books

3. The overlap rate is an important guarantee for improving the connection
points of photos, but sometimes the overlap rate is lowered in order to
save flight time or expand the flight area. If the overlap rate is low, each
feature point will only appear in a small amount of aerial photos, and the
amount of extracted connection points will be small. Naturally, fewer
connection points of photos will cause the photos of the aircraft to be
rough, and eventually the extracted connection points will be flat. Poor
structure is weak. A high overlap ratio avoids these problems.
4.Flying altitude
The flight height mainly affects the GSD (the actual size of each pixel) in
the flight film. A change in flight height will necessarily affect the size of
the flight film. The closer the aircraft is to the ground, the smaller the
GSD value and the accuracy The higher. It can also be found out that
selecting a suitable flying height for areas with large fluctuations on the
ground is also a very important part to improve accuracy.
The above is the analysis of the factors that affect the accuracy of
industrial drone aerial surveys. While drone aerial surveys bring various
conveniences to field work, field surveys also have certain requirements.
In the field, we must strictly pay attention to the factors of aerial survey
in terms of phased point layout, weather reasons, flying height and
overlap rate, so as to obtain higher surveying and mapping results.
Collected by MMC:www.mmcuav.com