Dear Mr. Om Parkash,
As stated by author her uncle is in occupation of "government land" since 1970, what is your query qua title of the land under cultivation ? What do you propose and advise to seek information via RTI application? What would you like to do for a google map of the piece of land which is in the possession of her uncle as there is no ambiguity?
As per query of Ms. Manju "some" outsiders claiming to be owners are objecting to the occupation/ possession of said "government land". on the strength of "patta" issued in their favour. However, the person-in interest (uncle of author) is having document of adjecent land/ survey number but not of that particular survey number, which he is cultivating since 1970..
It would be better to give some help to the author for specific question, if you can contribute.