ground truth data meaning in Chinese

地面实况数据

The background database containing rs , gis , gps , statistical and ground truth data is classified to spatial database and attribute database . management function of the background database is important to other functions such as data gathering , data searching etc . the background database offers powerful working platform and reliable data collected rapidly
以系统管理为核心功能，以数据采集、编辑、检索等为扩展功能的数据库可为运行化作物遥感识别提供强大的工作平台和快速、全面、可靠的数据支持。