The explanation and interpretation of these stats can be found in my article about evaluating shooting in the NBA. Additionally, the top 25 players for each of these stats can be found in the created stats page.
Shooting Above Average
FG% = FG / FGA
Dist = average shot distance
ASTD = proportion of field goals assisted
AvgSC = average shot clock remaining at time of shot
AvgTT = average touch time between catching the ball and the shot
AvgCD = average distance of closest defender for shots (in feet)
exp FG% = 0.7874 – 0.0072*Dist – 0.139*ASTD + 0.0071*AvgSC – 0.048*AvgTT – 0.0238*AvgCD
SAA = FG% – exp FG%
Field Goals Above Average
FGAA = SAA*FGA
Adjusted Spacing
Spacing = Dist – AvgCD
3P% = 3P / 3PA
Adjusted Spacing = 3P% * Spacing