Waterfronts (including lakes, rivers, bays, etc.) should be excluded from both the numerator and denominator in the calculation for edge development and infill. For example, if a home lot has a 400-foot border with previously developed land, a 200-foot border with previously undeveloped land, and a 400-foot border with lakefront, then the home should be treated as having (400 / (400+200)) = 67% bordering previously developed land.
Updated 10/1/13 for rating system applicability.