基于ETM+的深圳市绿地信息提取方法研究

针对深圳市生态绿地信息系统的规划需求，利用Landsat ETM+影像通过对3种图像增强方法(原始波段组合、差值运算、NDVI与其它波段组合)进行比较，集中探讨了深圳市绿地信息提取的最佳方法。结果表明，NDVI与其它波段组合法对于深圳市绿地信息的提取，可以得到比较理想的绿地分布信息，达到了城市生态绿地监测的要求。

A Study on Methods of Obtaining Greenland Information Based on ETM+ in Shenzhen City

With characteristics of "synthesis,multi band and rapid message updating",ETM image has been regarded as a most important technology in the study of resources and environments.Aiming at the need of constructing ecology Greenland information system in Shenzhen city,this paper focuses on the best methods of obtaining Greenland information of Shenzhen city.Because optimal bands selection is the most important parts in remote sensing image enhancement,we introduce three methods in image enhancement,such as basic bands combination,minus operation,NDVI combination with other bands.Studies show that NDVI combination with other bands is an ideal method for extracting Greenland information in Shenzhen city,meet the need of monitoring ecology Greenland of city,using this method to analyze distribution of urban Greenland cover can help government to plan and manage green land.