7.7 Corridor Plan

This type of flight plan is used for surveying roads, canals, rivers, pipelines, etc. Especially for long distance. Flight lines should always run lengthwise through your corridor.

  • Set the altitude mode to "Relative" mode or "Terrain" mode. The best photogrammetrical results are possible when terrain mode is used and an expected elevation change during the flight. To maintain a constant ground sampling distance throughout the plan, terrain mode automatically modifies the drone's altitude.

  • Set the altitude and speed of the drone.

  • Click "Next" to proceed with a flight.

7.7.1 Camera Settings

Various parameters are to be set at the desired values as follows:

  • Camera Type: Select the type of camera to be used from the dropdown menu.

  • Sensor Height and Width: The size of the image sensor of the camera will be calculated and displayed here for the selected camera except a custom camera.

  • Image Height and Width: The height and width of the images will be displayed for the selected camera type except for the custom camera.

  • Focal Length: The length of the camera lens. Focal length is determined by a combination of sensor size, effective distance from mirrors within the lens, and glass curvature. Drone cameras come with a variety of lens options that range in effective focal length from 10mm to 1200mm. Long focal lengths are typically associated with lower resolution and are utilized for visual inspections, not surveys or 3D generated asset inspections.

  • Corridor Width: Adjusting the corridor width will increase the area processed. Increase the width to create a wider corridor with more passes.

  • Front and Side Overlap: set the front overlapping, side overlapping value to the images also in the respective text boxes. By default, the front overlap value is 0. Image overlapping overlap occurs between each image.

  • Altitude: Select the proper altitude for capturing clear and sharp images with good quality.

  • Turnaround Distance: An amount of additional distance to add outside the area for flight turnaround. Users can set the turnaround distance to the survey pattern by entering the required value in the given text box. By default, turnaround distance is 0.

  • Add Rally: This is an additional security provided for landing the drone safely and smoothly.

7.7.2 Corridor Survey Statistic

  • Corridor Area: The area to be mapped is defined by the width of the corridor. This value is used to calculate the number of flight lines. The standard corridor width is 121 m, which corresponds to three sweeps.

  • Survey Distance: The total distance of the corridor plan is denoted by distance. It depends on the length of the corridor plan.

  • Survey Time: The time taken to complete the flight on the defined corridor plan is indicated by the parameter called "Time".

  • Ground Resolution (GSD): The distance between two adjacent pixel centers as measured on the ground is known as resolution or average GSD (Ground Sampling Distance). The low GSD values provide better accuracy.

  • Image Count: The Number of images to be captured is denoted by image count. The count of images to be captured depends upon the area of the corridor. More the images more efficient is the data set obtained for processing.

Fence: Mark the points for providing the fence to the drone. It is mandatory to all the types of flight plans.

After setting all these parameters and adding the fence move further for a flight by saving the plan.

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