摘要
本文以山西汾河水库为研究区域,利用高分一号卫星影像,分别选择阈值分割法、归一化差异水体指数法和面向对象法对研究区水体信息进行提取,并对3种方法提取结果进行精度检查。通过试验得出如下结论:阈值分割法对水体先验知识要求低,简单易用;归一化差异水体指数法由于未能消除阴影与水体的混淆问题,使得提取水体信息精度较低;面向对象法提取水体信息结果精度较高,但易丢失人工水塘与沟渠信息。该研究结果对利用高分一号卫星影像进行其他土地利用信息的提取具有一定借鉴意义。
The Fenhe Reservoir in Shanxi Province is taken as the research area in this article,and Gaofen No.1 satellite images are used to extract water body information in the study area by using threshold method,normalized difference index method and objectoriented method.Meanwhile the accuracy of the extracted results from the three methods gets checked.The following conclusions have been drawn from experiments:the threshold method requires low prior knowledge of water bodies and is simple and easy to be used;the normalized difference water index method has low accuracy in extracting water information due to its failure to eliminate the confusion between shadows and water bodies;the object-oriented method has higher accuracy in extracting water body information,but it is prone to losing information about artificial ponds and ditches.The research results have certain reference significance for extracting other land use information by using Gaofen No.1 satellite images.
作者
贾波
JIA Bo(Shanxi Institute of Surveying and Mapping Geographic Information,Taiyuan 030001,China)
出处
《经纬天地》
2024年第3期6-10,共5页
Survey World
关键词
水资源信息提取
高分一号卫星
阈值分割法
归一化差异水体指数法
面向对象法
water resource information extraction
Gaofen No.1 satellite
threshold method
normalized difference water index method
object-oriented
