基于Landsat 8数据的城市不透水面及其与热环境的关系研究

利用Landsat8数据,以成都市为研究对象,采用光谱混合分解模型研究估算成都市的不透水面分布信息。通过MNF变换和PPI指数运算,确定高、低反照率,植被及土壤四类光谱端元,并利用Landsat8新增的卷云波段去除云、土壤、沙地等噪声和MNDWI指数去除水体。修正后的高、低反照率组分含量之和即为不透水面含量的估计值。通过将不透水面信息与利用TIRS11波段反演的地表温度进行回归分析,发现两者呈正相关。

An Analysis on Urban Impervious Surface and Its Relation with Thermal Environments Based on Landsat8

The traditional artificial acceptance is commonly adopted for flight quality inspection in most surveying and mapping produc-tion unit.Because of its inefficiency, it cannot quickly form quality inspection report or adapt to the technical requirements of informa-tion surveying and mapping production.This paper, from the perspective of production practice, summarizes a method of quality in-spection and develops a prototype system to inspect the flight quality in the process of aerial photography based on automatic fast mosa-ic in digital aerial image.According to the validation of 103 aerial images from three air strips in the southeast coastal area of Zhejiang Province, the experimental results show that the above prototype system is able to accomplish a quick inspection of the aerial flight quality and automatically output flight quality evaluation report, thus basically replacing the traditional manual inspection.