摘要
以 1∶2 .5万比例尺TM卫片为主要信息源进行二类调查 ,在内蒙古大兴安岭林区 ,已全面实行两年。由于TM卫片与基本图比例尺一致 ,且TM卫片为多中心投影 ,近似于垂直投影 ,图面精度可达 98 1%。但是 ,在TM卫片处理过程中 (线性拉伸 ,边缘增强等人为因素使带状地物 (河流、道路等 )宽度增加 ,造成卫片上带状地物面积误差较大 ,精度较低 ,从而影响二类调查质量。文章通过对毕拉河林业局境内河流、道路、带状林地转绘面积误差进行研究 ,找出误差规律性 ,以便在带状地物面积求算时加以调整 ,提高二类调查面积精度 ,从而保证二类调查质量。
Taking the information from the TM satellite film(1∶2.5),forest management has been getting on for 2 years in Great Xing′an Mountains area,Inner Monolia.In this paper,using rato;Tm satellite film and based map,some factors influenced the interpreting precision have been discussed. In the process of interpreting TM satellite film,Man-made errors,such as stretched line,reinforced edge,may take down the interpreting precision.In this paper,the date form.Bilahe district has been analysed to find the regularity for the river,roadand belt-spot.Form the experiment,the precision is up to 98.1%.
出处
《内蒙古林业调查设计》
2001年第2期50-52,共3页
Inner Mongolia Forestry Investigation and Design
