TM图像土地利用分类精度验证与评估——以定西县为例

Verification and Assessment of Land Use Classification by Using TM Image-Taking Dingxi County as an Example

基于GIS技术,介绍一种数学重采样的遥感土地利用调查精度验证方法。利用该方法对定西县2000年土地利用调查结果的一级分类进行了分层验证,结果表明,定西县土地利用调查总体精度较高。人工用地的分类精度估计值为0.95,农业用地的分类精度估计值为0.99,自然/半自然植被的分类估计值为0.97,水体的正确分类估计值为1,未利用土地的分类估计值为0.94,总的分类精度估计值为0.9791。这说明复杂地区土地利用调查中用TM图像作为主要信息源是可行的。

Based on remote sensing and GIS technology, a mathematical method to verify the precision of remote sensing land use classification was introduced It was used to check the first grade classification result of land use of Dingxi County in 2000 The precision is relatively high The variance for correctly classifying the areas of man\|use\|land is 0000000027, of agricultural land is 0000021871, of natural and semi\|natural vegetation is 0000005427, of water body is 0, and of unused land is 0000009201 The total classification precision is 09791 The verification result reflects the reliability of using TM image as a main resource for land use investigation in complicated region