摘要
元江县山区面积占全县总面积的96.8%,垂直高差达2253m,地形复杂,植被类型存在明显的垂直分布熏只用一个解译体系来解译这一有较大差异地区的影像是有困难的。因此本研究为提高影像解译的准确性熏在对2002年2月9日覆盖元江全景的TM卫星影像进行数据校正、影像融合、影像分层、计算机自动监督分类的基础上,利用全球卫星定位系统穴GPS雪,结合野外踏察及地形图、土地利用相关信息对机读结果进行目视检验和GIS分析校正,最终划分出18类植被类型、9类土地利用类型。判读结果经检验,土地利用的判读精度为84.2%熏植被类型的判读精度为80.6%。
Yuanjiang County has complex topography, mountain area takes the 96.8% of whole county total area, elevation spatial difference reach to 2 253 metre, vegetation type has obvious vertical distribution. It is usually difficult to obtain accurate image information in use only one interpretation system. Landsat/ TM image data on Feb. 9,2002 that covers Yuanjiang County was used as data source in the study. The image data was processed with the support of methods-geometric correction, image merge, image stratification, and computer automatic supervised classification that using global positioning system(GPS) and some geographic information data established interpretation sign between field and TM image. To improve the accurate of auto-interpretation, the research have carried out visual interpretation and geographic information system(GIS) analysis correction based on auto-interpretation, combination with field survey, GPS fixed position,topographic map and land use information. As result, 18 kinds of vegetation type and 9 kinds of land use type were divided. Land use type precision is 84.2%, vegetation type precision is 80.6% by inspection.
出处
《云南地理环境研究》
2004年第4期35-40,共6页
Yunnan Geographic Environment Research
基金
玉溪市环保局"玉溪市生态环境规划"项目.
关键词
元江县
遥感
植被/土地利用类型
判读方法
Yuanjiang County
remote sensing
vegetable and land use types
interpretation method
