Demarcation of land

It is believed that the share of deceased wife has been mutated in the name of her legal heirs.

While you can approach the demarcation might be per decision of pending matter in the court. 

Mutation is not a title deed by itself, and maximum it may establish your physical possession.  Every thing ultimately depends on Court decision in on going suit and attracts injunction orders and lis pendency.

It appears that there are deeper issues. Please post the complete facts.

The issue before court shall be decided by court.

In case of death of owner/co-sharer the share devolves upon legal heirs per provisions of personal law and is reflected by updation in mutations record say; Virasat Ka Intkaal.

For the same demarcation by boundaries is not the requirement.

As pointed by Mr. P.Venu the querist may post the issues.

It takes more time to get the justce from the court. According to the rushmyessay review, most of the cases are in pending state. You should ask your lawyer to find another way to get success in the case.