[request] How far could a human realistically travel by launching himself from a catapult and then unfurling a wingsuit?

By this I mean. Assuming effort is put into getting the best launcher money can buy and it does not need to be a traditional catapult at all. As long as the human is being launched mechanically. By unfurling I just mean that the person is straightening in the air such that one is trying to glide as far as possible.

Edit:

Was assuming that the launch point is on flat ground, but I am happy with any answer. For example from a hill or vantage point.