Fig 1.
The relationship between the toilet coverage, tourist consumption, and the proportion of ethnic minorities in 2017 (copyright hold by the authors).
Fig 2.
Study area (copyright hold by the authors).
Fig 3.
Tourism data of the 16 national ethnic regions in 2019 (copyright hold by the authors).
Fig 4.
Flowchart (copyright hold by the authors).
Fig 5.
Layout of current toilets in each districts of urban area (copyright hold by the authors).
Fig 6.
Service scope of current toilets in context of land use (copyright hold by the authors).
Fig 7.
Current layout of tourist toilets in key scenic areas (copyright hold by the authors).
Table 1.
Service data regarding tourist toilets in key scenic areas.
Fig 8.
The first and second location analysis process (copyright hold by the authors).
Fig 9.
Optimal layout scheme for tourist toilets in urban area (copyright hold by the authors).
Table 2.
Calculation of distance between tourist toilets.
Fig 10.
Optimal layout schemes for tourist toilets in scenic areas (copyright hold by the authors).
Fig 11.
Statistics of tourist toilets in scenic areas before and after optimization (copyright hold by the authors).