Table 2 Influencing factors for VTV and their measurement
Dimension | Code | Indicator | Unit | Measurement method | Â |
|---|---|---|---|---|---|
Terrain | X1 | Topographic relief | ° | The number of altitude changes between the highest and lowest points within a unit (Bayesian change-point analysis showed that the best statistical unit for Lishui region is 0.176 km2) | (1) |
X2 | Elevation | m | The altitude of the village | (1) | |
Facility | X3 | Distance to primary education | km | Distance from the village to the nearest kindergarten or primary school | (2) |
X4 | Distance to medical facility | km | Distance from the village to the nearest clinic, health station, and hospital | (2) | |
X5 | Distance to transportation facility | km | Distance from the village to the nearest gas station and parking lot | (2) | |
Industry | X6 | Distance to agricultural bases | km | Distance from the village to the nearest agricultural bases (bases of farm, forestry, animal husbandry, and fishery) | (2) |
X7 | Distance to industry | km | Distance from the village to the nearest industrial factory | (2) | |
X8 | Distance to scenic spots | km | Distance from the village to the nearest to the scenic spots above AAA level | (2) | |
| Â | X9 | Distance to commercial industry | km | Distance from the village to the nearest commercial facility | Â |