This sanctuary has been extensively surveyed by Prof. C.P. Kala for distribution of plants and their indigenous uses as established by the amchis - the practitioners of tibetan medical systems.

Mul Dwarka, the third site, which has been considered as Dwarka of Mahabharata period has been surveyed extensively for any submerged archaeological remains.

Although Guatemalan macrofungi have not been as yet extensively surveyed, a preliminary checklist encompasses some 350 species of macromycetes (31 ascomycetes and 319 basidiomycetes) occurring in 163 genera and 20 ascomycetous and basidiomycetous orders.

This Wildlife Sanctuary has been extensively surveyed by Prof. Chandra Prakash Kala for distribution of vegetation, including plants of medicinal values, across the environmental gradient and habitat types.

The needle detector and cylindrical geometry (wire) have also been extensively surveyed.

The 11 Group Operations Room was extensively surveyed in order for a replica to be built at Pinewood Studios for the 1969 film Battle of Britain.

Land was surveyed extensively and classified.

The old-growth forestlands throughout Green Lakes State Park were extensively surveyed in 2001-2002 by members of the Wildwood Ancient Forest Alliance.

In 1997, a work crew extensively surveyed trail locations and known campsites for shells.

The site was extensively surveyed and documented to support its mission.