Hi,
I observed the Spacing and pitch of the metal lines values in the lef file .Whats the purpose of mentioning two ?Is any one is not sufficient to Place & Route tool?
The distance between middle metal to middle metal is called as the pitch that is suppose u have two metal layers M1 to M2 or M1 to M1 so the pitch will be the distance between M1/2 to M1/2 and this is needed to make a P and R boundary perfect Otherwise u will get DRC violations and these are the design rules which we need to follow in the design..Hope it is clear for u
Bye take care