# 3.3.10. Active Tiles File¶

The active tiles file contains a vector of 1s and 0s, where 1 is used to denote a tile (local forward mesh) that is used in the inversion and 0 is used to denote a tile that is not. For example:

1
1
1
1
1
0
0
1
1

Note that the 6 $$\!^{th}$$ and 7 $$\!^{th}$$ tiles specified in the forward mesh file (and their associated data) will not be used in the inversion.