城镇建设用地遥感影像提取方法的对比研究——以毕节市七星区为例

Comparative Study of Urban Construction Land Extraction from Remote Sensing——A Case Study of Qixing District,Bijie City

利用2013年11月15日的TM遥感影像,结合归一化建筑指数(NDBI)、改进的归一化建筑指数(IB)、新居民地提取指数(NBI)等建筑物提取指数对毕节市七星区城区建筑用地信息进行有效提取和分析,并用混淆矩阵和对应年份实际城镇用地面积对3种方法的提取精度分别进行了验证。结果表明,NBI指数算法比其他建筑指数算法提取建设用地信息的精度高且误差小,采用NBI指数能更准确地提取建设用地的信息。

The urban built-up information in Qixing District,Bijie City was extracted and analyzed using the NDBI index,IB index and NBI index from TM image on Nov. 15,2013. Besides,the corresponding year urban land area extraction accuracy was validated with confusion matrix array.The results showed that the NBI index algorithm is better than other construction index algorithms for extracting the construction land information with high accuracy and small error,which can be more accurate for extracting the information of construction land with NBI index.