Are you using this for , or were you looking for a different "Metro" related file (like a game mod or a transit data set)?

It can generate error maps to show exactly where a model deviates from the original.

Evaluating different mesh processing algorithms against one another.

This specific file is a tool used for comparing the difference between two triangular meshes (often used in 3D modeling and computer graphics to measure simplification error). Key Details for Download