Getting the location is very easy but getting the rotation is not.

I don't know if you need the leaves to be rotated exactly as sapling generates them, but there is another way to achieve a very similiar result (if not even better) and have all leaves instanced.


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Go into edit mode -> select all faces -> press P -> By loose paths
![Go into edit mode -> select all faces -> press P -> By loose paths][1]


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To recalculate origins, press Shift+Ctrl+Alt+C and select Origin to Center of Mass
![To recalculate origins, press Shift+Ctrl+Alt+C and select Origin to Center of Mass][2]


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Now link all the objects to one leaf with Ctrl+L
![Now link all the objects to one leaf with Ctrl+L][3]


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Before the next step, it is important to hide everything because we will be using Proportional editing in object mode to randomize the rotations
![Before the next step, it is important to hide everything because we will be using Proportional editing in object mode to randomize the rotations][4]


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Turn on Proportional editing (blue circle or shortcut O) and set it's Falloff to Random
![Turn on Proportional editing (blue circle or shortcut O) and set it's Falloff to Random][5]


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You also need to set the Pivot Point to Individual Centers
![You also need to set the Pivot Point to Individual Centers][6]


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Then it's time to rotate either way you wish, rotation of the other visible objects will be randomized. This is the result after hitting Alt+H to unhide the trunk
![Then it's time to rotate either way you wish, rotation of the other visible objects will be randomized. This is the result after hitting Alt+H to unhide the trunk][7]


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This step is just an extra, to hide all the dotted black lines (relationship lines) you can uncheck them in the 3D View's N menu under Display tab
![This step is just an extra, to hide all the dotted black lines (relationship lines) you can uncheck them in the 3D View's N menu under Display tab][8]

This is it!

Could you elaborate why are you needing this? Maybe there's a different solution to the problem and this is an unnecessary step. For example you can get the rotation data through Geometry -> Normal in node editor for setting up materials.


  [1]: https://i.sstatic.net/Uvtbe.jpg
  [2]: https://i.sstatic.net/ENd92.jpg
  [3]: https://i.sstatic.net/HyIin.jpg
  [4]: https://i.sstatic.net/cGGyh.jpg
  [5]: https://i.sstatic.net/WkB2z.jpg
  [6]: https://i.sstatic.net/E9fvj.jpg
  [7]: https://i.sstatic.net/aj3BX.jpg
  [8]: https://i.sstatic.net/2WSFG.jpg