City Walls 2021
收藏数据链接：
官方服务：
资源简介：
Georeferenced areas of five thousand city walls from five thousand years about 20 hectares and greater. Ready for GIS-import in two parts. I would prefer the free QGIS. The area-file is displayable after double-clicking via installed Google-Earth. The readme-section contains some additional information.
提供机构：
Zenodo创建时间：
2021-08-15
