3.4. Criteria Maps Generation and Classification
The related factors and criteria as seen in Table 2 were created and kept as GIS layers. Firstly, visibility factor was generated from a digital elevation model integrated with location of natural uniqueness by View-shed analysis on the basis of visible or not visible. Land used/cover factor was classified and reclassified from 2007 land use map according to bio-physical vegetation characteristics of ecotourism potential resources. Reservation/protection factor was classified by type of protected areas, which are suitable for habitat with regards to wildlife reserve, rare species, and newly found species. In this study, Wildlife Sanctuary (WS) and Non Hunting Area (NHA) are ranked as high, National Park (NP) areas are ranked as medium, and Non Forest Reserve (NFR) areas are ranked as moderate. On the other hand, the areas outside of the protected area are ranked as not suited for ecotourism. Species diversity factor was classified from the number of recorded species (mammals, birds, reptiles and amphibians) in order to consider wildlife population abundance in the area. Elevation factor was generated from digital elevation model. Slope factor was classified by degree measurement unit. Proximity to cultural sites factor was classified by Euclidean analysis according to the nearby cultural sites. Distance from roads factor depends on the transport condition by access types and distance from the road types. Settlement size factor was classified by population size