草地资源遥感调查方法的研究

七十年代以来,遥感技术发展十分迅速,它广泛地应用于地质、地理、土壤、森林、草地等多种学科。草地资源遥感调查就是利用遥感技术调查草地的数量、质量和分布,它更新了常规调查的方法和手段,缩短了调查周期,改变了草地资源图件的制图工艺和流程,提高了总体调查的准确性。新一代陆地资源卫星遥感影像的应用,明显提高了地类的可判性和判读精度,增加了各类草地面积数据的可靠性,特别是经过 TM 波段比较值处理和 TM 缨帽变换等处理后的影像,质量较高,其解译精度完全符合大面积草地资源调查的精度要求。

THE METHODS OF GRASSLAND RESOURCE INVESTIGATION USING REMOTE SENSING

Since 1970s,remote sensing techniques have developed fast and have been applied to a lot of subjects,such as geology,geography,soil,forestry and gra-ssland science.The application of it to grassland resource investigation is to sur-vey the types,distributions,quantities and qualities of grassland.Comparing to the post methods of investigation,there are many advantages to investigate grassland resource using remote sensing techniques.First,it,can shorten the investigation period.Second,it,can simplify the technological processes ofgrassland resource mapping and sparingly use manpower and material resources.Third,it can increse the accuracy of grassland investigation.The identifying possibility of grassland types and the interpretation reliability of areas have been incresed with the development and application of the Landsat 4-5 image data.In particular,the treated images using Ratio of TM Original Bands and TM Tasseled Cap have very high resolution,and the interpretation percision of them completely accords with the demands of large grassland investigation.