The pilot's improper decision to delay turning toward a suitable runway once he realized that an engine failure had occurred, which resulted in his having inadequate altitude to glide to a suitable runway, and the New York terminal radar approach control LaGuardia Airport area controller's provision of erroneous emergency divert airport information to the pilot. Contributing to the accident were (1) the Federal Aviation Administration's lack of a requirement to periodically review and validate radar video maps, (2) the failure of the engine crankshaft due to a bearing shift, and (3) the pilot's impairment due to his abuse of amphetamine and underlying medical condition(s).