DNA: What is the need of survey of Gyanvapi?

Regarding the Gyanvapi complex, the Hindu side always argues that it is clearly visible in Gyanvapi that there was an ancient temple there. And no evidence is needed to prove it. The Muslim side is preparing to go to the Supreme Court against the decision of the High Court, but the ASI and the administration have started preparations for the survey of the Gyanvapi campus...