yes we use existing algorithms

what exactly is novel in this paper?

"There is no justification and evaluation on their proposed work" - What?!?!

"No implementations described in the paper"
  - WHAT?!?!

"The author needs to add more technical detail in the paper to demonstrate
 the novelty and the sigificance of their work"
  -  ...okayyyy...

"Virtual reality has already been employed in geographic exploration by
 researchers and scientists"
  - was has already been virtual reality-ized??
  - has this?
  - for this purpose?

"Results are not sufficient to prove the claim of the paper, like
 'interactive visualization'"
  - What claim?!?!

present timing numbers compared to other systems like ArcGIS & ArcScene

explain figures 7 and 8, why colors aren't important, or what they can represent