TM影像在热带林林地资源调查中的应用

Utilization of LANDSAT TM Image on Survey of Tropical Forest Land Resources

利用TM影像对滇西南 7个地 (州 ) 2 7个县 (市 )开展了调查 ,并按 2级分类的要求进行目视解译 ,其结果为 :研究区热带林覆盖率为 46 0 9% ,郁闭林面积占研究区总面积的 10 46 % ,破坏林面积占总面积的35 6 3% ,常绿阔叶林面积占总面积的 32 6 1% ,热带雨林和季雨林面积占总面积的 0 2 0 % ,判读精度 81 5 3%。表明TM影像能满足热带林宏观林地资源调查的需求 ,既快速 ,又省力、省钱 。

The forest resources of 27 cities and counties in South western Yunnan were surveyed by LANDSAT TM image and visual interpretation The results indicated that the tropical forest coverage of these areas was 46 09%, with 10 46% of closed forests, and the other 35 63% was destroyed 32 61% of the total areas were covered with evergreen broad leaved forests, and 0 20% was tropical rain forests and tropical seasonal rainforests The interpretation rate of 81 53% indicated that LANDSAT TM image could satisfy the forest land resources investigation It was a fast, labor saved and economical method The difficulties for interpreting the broad leaved species, mixed broadleaf conifer forests, open forest areas, brush fields, non timber forests, unformed forest lands were proposed