3S集成技术在土地利用动态监测中的应用

Dynamic Monitoring of Land Use Changes Based on Integration of RS,GIS and GPS

针对基于RS和GIS的土地利用动态监测方法可靠性差，精度低，提出了RS，GIS和GPS集成技术．在2000年TM遥感影像解译数据的基础上，以2004年中巴资源卫星（CBERS-02）遥感影像数据为信息源，对2004年遥感影像进行了解译，修改了2000年数据库．在野外用手持GPS接收机对解译成果进行了验证，更新了解译的数据库；利用GIS技术的空间分析功能，提取出了2000～2004年间土地利用／覆被变化信息，得到了高精度的土地利用动态变化数据库，并在此基础上对土地利用动态变化信息进行了分析．实验结果表明，利用3S集成技术可以提高土地利用信息的可靠性和精度。

To improve the reliability and precision of land use dynamic monitoring based on RS （ remote sensing） and GIS （ geographic information system）, a method based on the integration of RS, GIS and GPS （globe positioning system） was given. Firstly, land use and land cover changes were interpreted in the light of the CBERS-02 images in 2004 and the database interpreted from TM （thematic mapper） in 2000. Secondly, the interpreted result was validated in the field with a GPS receiver and the database was updated. Finally, the dynamic changes of land use and land cover with a high precision from 2000 to 2004 were extracted and analyzed from the updated database by utilizing the spatial analysis function of GIS. An experiment for the dynamic changes of land use and land cover in Sichuan Province was carried out. The experimental result shows that the reliability and precision of land use based on the integration of RS, GIS and GPS can be improved.