Question
You have been asked by a mining company to fly an aerial survey for them.The area to be imaged is a 30 km (E-W) by
You have been asked by a mining company to fly an aerial survey for them.The area to be imaged is a 30 km (E-W) by 40 km (N-S) rectangle. The mining company would like the aerial digital images to be captured at 10 cm ground sample distance (GSD) with a Vexcel Ultracam X digital mapping camera [sensor size: 6 cm (H) x 10 cm (W), 9400 (H) x 14400 (W) pixels]. The focal length of the camera is 104 mm. The aerial images should have an average forward overlap of 60% and an average sidelap of 30%.
The number of required flight lines is a product of the required amount of sidelap, the lateral distance covered by a single image (swath width) and the total width of the rectangular area to be imaged. Assuming an average sidelap of 30% (or 0.3), the lateral gain from one line to another is 70% (or 0.7) of the swath width of an image.
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