Table 1 Classification and data sources of impact factors
Category | Impact factor | Description | |
|---|---|---|---|
Single defensive capability (A) | Military strength (A1) | Number of troops(A1-1) | Historical information of the Wei fort |
Defensive construction (A2) | Perimeter (A2-1) | ||
Wall height (A2-2) | |||
Wall thickness (A2-3) | |||
The width of the moat (A2-4) | |||
Number of gates (A2-5) | |||
Coordinated defensive capability (B) | Settlement accessibility (B1) | The nearest distance between a Wei fort and other Wei forts (B1-1) | Calculated in ArcGIS based on the geographical location |
The nearest distance between a Wei fort and other Suo forts (B1-2) | |||
Assistant settlements (B2) | Number of Bao (B2-1) | Historical information of the Wei fort | |
Number of Xunjiansi (B2-2) | |||
Information and material transfer (B3) | Number of post stations (B3-1) | ||
Number of beacon towers (B3-2) | |||
Jurisdictional control capacity (C) | Population (C1) | Population (C1-1) | The average for the state where the Wei fort is located. e.g. C1-1 = the population for the whole state/the number of Wei fort in this state |
Economics (C2) | Tax (C2-1) | ||
Food (C3) | Grain output (C3-1) | ||