Table 1 Evaluation indicator system of military settlement heritage in Liaoxi Corridor

Historical value

Settlement area/m²

The actual area of each settlement

Defense level

Zhen city (10), Lu city (8), Wei city (6), Suo city (4), Bao city (2)

Troop size/person

The number of soldiers stationed in each settlement

Number of nearby military facilities

The number of military facilities near each settlement is obtained through GIS neighbor analysis

Scientific value

Build time

Hongwu–Xuande period (1368–1435) (10), Zhengtong–Tianshun period (1436–1521) (8), Jiajing–Chongzhen period (1522–1644), (6) others (4)

Cultural relics protection level

National (10), provincial (8), municipal (6), county (4), none (2)

Tangible relics

Many tangible relics and in good condition (10), some relics in general condition (8), Few tangible relics, but well preserved (6), poor preservation (4), almost no relics (2)

Social value

Elevation

The elevation values of each settlement

Horizontal distance from the Ming Great Wall or coastline

The horizontal distance from the Ming Great Wall (Land defense), the average horizontal distance from the Ming Great Wall and the coastline (Land-coastal defense)

Current location conditions

Municipal (10), county (8), town (6), village (4), other (2)

Land use type

Forest land (10), grass land (8), wetland (6), cultivated land (4), construction land and others (2)

Cultural value

Intangible relics

Many intangible relics and in good condition (10), some relics in general condition (8), few relics, but well preserved (6), poor preservation (4), almost no relics (2)

Historical events

The importance and the number of historical events

Cultural continuity

The preservation of traditional cultural

Artistic value

Architectural forms

The preservation of architectural forms

Materials

The use of traditional materials

Decorations

The preservation of architectural decoration