2.1 Aerial Photographs of Unmanned Aerial Vehicles

This segment explains how to use consumer-grade uncrewed aerial vehicles to collect flight data. Note: The content below is for reference only.

Precautions for flight

Operating unmanned aerial vehicles carries certain risks. Always prioritize safety while flying and avoid crowds.
Before the unmanned aerial vehicle flies, please verify the local laws, regulations, and relevant national regulations to ensure that the flight mission is conducted in a manner that is both legal and safe. Additionally, please review the appropriate policies and safety guidelines for Xinjiang.
Before the flight, we should thoroughly understand the site conditions (including building height, wires, buildings, and crowds) of the area where the route passes.
Before flying, inspect the UAV equipment, including the aircraft, remote control, and connecting devices, to ensure that sufficient power is available.
signals

Flight acquisition tutorial

The degree of overlap between flight and high-quality photos is a key factor that influences the quality of the final 3D model. Data collection for three-dimensional modeling using consumer-grade uncrewed aerial vehicles is divided into two categories: surround and route shooting.

Surround shooting involves capturing objects layer by layer at various heights based on the flying mode of interest points. This process entails manually flying around and capturing photos of surrounding buildings, which is suitable for three-dimensional models of a single building.

Surround shooting:

Surround the shooting objects layer by layer at varying heights based on the flying mode of interest points. This involves manually flying around and capturing photos of the surrounding buildings, which is suitable for three-dimensional modeling of individual building.

Precautions

Surround shooting is generally used for a single building or a single building.
Ensure the aircraft and remote controller signals are good during flight
In manual photos, ensure that the overlap between the left and right adjacent images, as well as the upper and lower adjacent photos, is at least 2/3
Take a series of downward-facing photos of the object to be photographed.

Procedure

Take the Dajiang Genie 4 Series as an example; the flight software is DJI GO 4.T

Set the return altitude in the DJI GO (or DJI GO 4) to a safe height, typically not lower than the height of the buildings in the flight area. Ensure that the remote control is set to your preferred operation mode.
The takeoff aircraft hovers near the photographed object and adjusts its camera angle accordingly. Adjust the aircraft's angle so that one-third to two-thirds of the shot includes the ground (this ground photo is taken to ensure the integrity of the ground information), while the rest features the object to be captured.
Move the aircraft horizontally along the object to be photographed, and operate the camera to capture images simultaneously. The camera's picture controls the degree of overlap between the two images, which is typically at least two-thirds. After the first round of shooting, raise the aircraft to a height where the image overlaps two-thirds with that from the first round, and perform the second round of surrounding shots at this height.
Repeat the above steps to capture photos from different heights until the camera frame includes a top view of the object being photographed.
After tilting the camera angle to 45 °, take the photos. Adjust the camera to a 90° angle facing downward, ensuring the aircraft is 10 to 50 meters higher than the object being photographed (if the object is taller, fly higher). Then, begin taking photos of the object from above. The overlap between the two adjacent images should be at least two-thirds.

Route shooting:

The route is planned according to specific parameters, and the aircraft autonomously collects photos along the route, primarily aiming to achieve three-dimensional digitization of large areas such as city modeling, site modeling, park modeling, measurement, and other application fields.

Precautions

Ensure the aircraft and remote controller signals are strong during flight.
In parameter setting, the height is usually set to 30 to 100 meters above the tallest building in the test area.
When many tall buildings are in the test area, increase the course overlap rate and side overlap rate.

Procedure

This example utilizes a Dajiang Genie 4 Series uncrewed aerial vehicle, with the flight software executing route shooting for the DJI GS PRO.

Open the DJI GS PRO software and click in the lower-left corner to access the flight task list.
Click the plus sign in the lower-left corner to create a task and select the 'Mapping Aerial Photography Area' mode.

Click on the map to select a point, and then click the area displayed on the screen. At this moment, a quadrilateral will appear, outlining the flight path. Drag the corners of the quadrilateral to adjust the flight area.
In the basic settings on the right side of the screen, configure the camera model, camera orientation, camera mode, route generation mode, and flight height. The general parameter settings are displayed in the following table.

Select Advanced Settings to adjust the course overlap rate, side overlap rate, central route angle, margin, pan-tilt angle, and task completion action. The general parameter settings are displayed in the table below:

Press the "Upload Route" button to begin uploading the route, as illustrated in the figure below:

Note：

The Upload route page must verify that the completed action is automatically returned and the out-of-control action is continued. After the route upload is completed, manually take the uncrewed aerial vehicle to a safe range and then click the button to start execution on the remote-control screen. If the takeoff site is mainly empty, the ground of the takeoff point of the crewless aerial vehicle is flat, and there are no obstacles on the ascending route, you can also directly click the Start button to enable the UAV to take off automatically.

Last updated 1 month ago

2.1 Aerial Photographs of Unmanned Aerial Vehicles

This segment explains how to use consumer-grade uncrewed aerial vehicles to collect flight data. Note: The content below is for reference only.

Precautions for flight

Operating unmanned aerial vehicles carries certain risks. Always prioritize safety while flying and avoid crowds.
Before the unmanned aerial vehicle flies, please verify the local laws, regulations, and relevant national regulations to ensure that the flight mission is conducted in a manner that is both legal and safe. Additionally, please review the appropriate policies and safety guidelines for Xinjiang.
Before the flight, we should thoroughly understand the site conditions (including building height, wires, buildings, and crowds) of the area where the route passes.
Before flying, inspect the UAV equipment, including the aircraft, remote control, and connecting devices, to ensure that sufficient power is available.
signals

Flight acquisition tutorial

Surround shooting:

Precautions

Surround shooting is generally used for a single building or a single building.
Ensure the aircraft and remote controller signals are good during flight
In manual photos, ensure that the overlap between the left and right adjacent images, as well as the upper and lower adjacent photos, is at least 2/3
Take a series of downward-facing photos of the object to be photographed.

Procedure

Take the Dajiang Genie 4 Series as an example; the flight software is DJI GO 4.T

Set the return altitude in the DJI GO (or DJI GO 4) to a safe height, typically not lower than the height of the buildings in the flight area. Ensure that the remote control is set to your preferred operation mode.
The takeoff aircraft hovers near the photographed object and adjusts its camera angle accordingly. Adjust the aircraft's angle so that one-third to two-thirds of the shot includes the ground (this ground photo is taken to ensure the integrity of the ground information), while the rest features the object to be captured.
Move the aircraft horizontally along the object to be photographed, and operate the camera to capture images simultaneously. The camera's picture controls the degree of overlap between the two images, which is typically at least two-thirds. After the first round of shooting, raise the aircraft to a height where the image overlaps two-thirds with that from the first round, and perform the second round of surrounding shots at this height.
Repeat the above steps to capture photos from different heights until the camera frame includes a top view of the object being photographed.
After tilting the camera angle to 45 °, take the photos. Adjust the camera to a 90° angle facing downward, ensuring the aircraft is 10 to 50 meters higher than the object being photographed (if the object is taller, fly higher). Then, begin taking photos of the object from above. The overlap between the two adjacent images should be at least two-thirds.

Route shooting:

Precautions

Ensure the aircraft and remote controller signals are strong during flight.
In parameter setting, the height is usually set to 30 to 100 meters above the tallest building in the test area.
When many tall buildings are in the test area, increase the course overlap rate and side overlap rate.

Procedure

This example utilizes a Dajiang Genie 4 Series uncrewed aerial vehicle, with the flight software executing route shooting for the DJI GS PRO.

Open the DJI GS PRO software and click in the lower-left corner to access the flight task list.
Click the plus sign in the lower-left corner to create a task and select the 'Mapping Aerial Photography Area' mode.

Click on the map to select a point, and then click the area displayed on the screen. At this moment, a quadrilateral will appear, outlining the flight path. Drag the corners of the quadrilateral to adjust the flight area.
In the basic settings on the right side of the screen, configure the camera model, camera orientation, camera mode, route generation mode, and flight height. The general parameter settings are displayed in the following table.

Select Advanced Settings to adjust the course overlap rate, side overlap rate, central route angle, margin, pan-tilt angle, and task completion action. The general parameter settings are displayed in the table below:

Press the "Upload Route" button to begin uploading the route, as illustrated in the figure below:

Note：

Last updated 1 month ago