Alpine iLX-507 Owners Manual - Page 64
Distance guidance mark, Error between the screen and the actual road, surface
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■ Distance guidance mark The distance guides represent the ground level distance from the rear bumper. It is difficult to accurately estimate the distance to objects above ground level. In the following example, the distance to A is 0.5 m and the distance to B is 1 m. ■ When there is a steep upward slope behind the car (example) about 1 m C B A (about 0.5 m) Distance guidance marks Actual distances In the screen, according to the distance guidance marks, the truck seems to be parked about 1 m away (at the position B). In actual fact, however, if you reversed to position A, you would collide with the truck. In the screen, positions A, B and C seem to be located in order of proximity. However, in actual fact, the position A and C are the same distance, and B is farther away than positions A and C. • The car width extension mark represents the distance to the road surface. The distance to an object on the road is not accurately represented by the guides. Error between the screen and the actual road surface In the following conditions, errors are produced between the screen guidance and the actual road surface. (The illustrations represent a case when the camera is installed in the standard position.) Error Error The distance guidance mark represents the distance to a flat road surface. Therefore in the case of an upward slope behind the car, the distance guides are displayed closer to the rear bumper than the actual distance. For example, if there is an obstacle on the upward slope, it may appear farther away than its actual position. Also, an error may occur between the guidance and the actual path of the car on the road surface. 64-EN