如何界定“城区”的地理边界，在学术界和行政管理工作中一直存在争议。针对遥感影像判读主观性强且缺少人文经济属性以及夜间灯光大数据精度低等不足，基于遥感影像、POI点、OSM道路网等多源数据，以市、区政府驻地为“种子”构建城区图斑连接条件，以公服设施密度为城区图斑筛选条件，采用点、面缓冲的连接方法界定南宁市的“城区”空间。结果表明，“种子”建立3 km缓冲连接扩张7次的结果最符合实际，成功识别出29个城中村，识别率达到82.85%。

How to define the geographical boundary of“urban area”has always been controversial in academic circles and administrative work.In view of the strong subjectivity of remote sensing image interpretation, the lack of humanistic and economic attributes and the low accuracy of nighttime light big data, based on remote sensing images, POI points, OSM road network and other multi-source data, taking the city and district government station as the“seed”to construct the urban spot connection conditions, taking the density of public service facilities as the urban spot screening conditions, we used the connection method of point and area buffers to define the“urban area”space of Nanning City. The results show that the“seed”establishes a 3 km buffer connection and expands it 7 times, which is the most practical. 29 urban villages are successfully identified, with a recognition rate of 82.85%.