Take-off and landing spots depend on the height and the type or profile (for example, vertical or oxer) of the obstacles. Different types of obstacles lead to different trajectories. With a vertical, the highest point of the flight curve is perpendicularly above the fence and thus, with a vertical, the ideal take-off point is generally a little further away from the fence than is the case with an oxer. This is because the width of an oxer means that the highest point of the flight curve is further back (ideally halfway between the front and back poles) than is the case for a vertical. Therefore, the take-off point for an oxer should be closer than for a vertical. It thus follows that a horse should arrive at an oxer closer than it would at a vertical. For the same reason, the landing point after a vertical is generally a little further away than it is after an oxer.