Abstract: As an example, the method of land subsidence monitoring by GPS was introduced in Jiangyin area, Jiangsu Province, China. The result stated that the precision of GPS data was able to satisfy the requirement of land subsidence monitoring. The authors discussed how to analyse the spatial and temporal law of subsidence based on GIS according to the GPS monitoring data. The GIS-based spatial and temporal analysis system for GPS data provided an advantaged method to analyze the law and correlation with the groundwater exploitation of the land subsidence.

Key words: GPS, land subsidence, spatial and temporal law, GIS

摘要： 以江阴市地面沉降研究为例，讨论了地面沉降的GPS监测技术，测量结果能够满足地面沉降监测的精度要求。并着重探讨了利用GIS处理GPS监测数据进行地面沉降时空规律分析的方法。

关键词: GPS, 地面沉降, 时空规律, GIS