Namaste,
Landscape in the Nāṭyaśāstra and clues to its spatial origin: A study in 2019 is the title of a paper which was presented at a National Seminar in Himachal Pradesh earlier this year.
Here is eminent historian of Indian-Kashmiri origin (पद्मश्री awardee) Dr. Subhash Kak's appraisal:
https://twitter.com/subhash_kak/status/1316778379610386434?s=20