![]() ![]() Where agriculture is involved, the movement of crops in the wind blurs imagery even more. Drones - especially lighter models - have difficulty staying steady during periods of high wind, which greatly affect image quality, which in turn affects a map’s overall accuracy. The high winds and rolling cloud cover should be avoided during mapping. This can artificially cause problems in your map and you might think that those problems are a problem with the plant themselves. Under partly cloudy conditions, you might be flying with your drone and you're taking pictures and then a big cloud comes. Strive to fly while the sun is highest in the sky and avoid weather patterns such as high winds and cloud cover. So the best practice is really to map under consistent lighting conditions, either consistently sunny or consistently cloudy. So if you're mapping under partly cloudy conditions, you're going to have variable light conditions. And we use those differences in light to determine how healthy the plants are, and how productive they are. And so when we are mapping vegetation out in the field we care about how much light is coming down from the sky and bouncing off of the plants. Problem number two that I see all the time is really has to do with lighting conditions. Many drone operators adjust the overlap depending on the needs of a particular project, striking a balance that creates the right amount of accuracy for the project’s outputs. Good default overlap is set at 60/70 in order to find a balance between accuracy and large image quantity. Sidelap is the percentage of overlap between each leg of a flight, while frontlap refers to the percentage of overlap between one image and the next. Overlap refers to the percentage of both sidelap and frontlap. Increasing the overlap for a flight is another way to create more matched points and greater accuracy. And the reason for that has to do with the engines, the photogrammetry engines that are processing the imagery from the camera. And that can be one of the biggest reasons that a project will fail to process. So that, it's getting 50-60% overlap in the imagery. So some folks want to reduce the amount of overlap. And it can limit the area that you can map on a given fly or given battery or even within a day. And as it comes back around, you want around 75% sidelap or so. So, when you are flying with your drone and you have a camera on it and you're mapping, in general you want 80% frontlap when the drone is flying forward. The first mistake is not getting enough overlap in imagery. ![]()
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