利用遥感和GIS技术监测城镇用地的扩展

Monitoring the City Extension Using the Techniques of Remote Sensing and GIS

采用基于主成分分析的假彩色合成、IHS融合及其关键技术、差值比值综合处理和缓冲区分析等遥感与GIS技术 ,对南京市城镇用地扩展进行了动态监测。充分利用了TM多光谱影像和SPOT全色光影像的光谱信息。在利用多源遥感影像实现计算机自动解译方面作了有益的探索。发现南京城镇的扩展速度加快与道路建设的发展具有同向性。

Dynamic monitoring of Nanjing city extension was conducted by using the technology of remote sensing and GIS which include pseudo color composite based on principal components analysis,integrated processing of subtraction and quotient,IHS fusion and the analysis of buffer.Full use of the information of multi spectral data of landsat TM and SPOT panchromatic by operation was made.It was a valuable study on fulfilling computer automatic classification by taking advantage of multi source and multi phase remotely sensed data.It was found that the direction of Nanjing city extension is similar to the direction of road building by technology of GIS.The results of the study will provide references in directing layout of Nannjing City.