土地利用现状遥感更新外业调查方法研究

Methods of External Investigation in Updating Land Use Information with Remote Sensing Data

以河南省偃师市为例,研究了土地利用现状遥感更新外业调查的方法。首先对原始影像进行预处理与校正,制作正射影像图;利用动态规划法确定最优调查路径;在严格的精度控制基础上,采用实地调绘的方法,分别调查境界与权属、地类图斑、线状地物、零星地类、耕地坡度与田坎系数。结果证明:外业调查能有效地解决内业判读过程中出现的多种问题。

This paper studies method of external investigation in updating land use information with remote sensing data, taking the city of Yanshi. As the foundational work of the investigation, firstly, high precision maps are drawn. Secondly, the optimum path of the investigation is chosen by dynamic programming. Finally ,the all-sided investigations are carried out so as to get the full and accu- rate and credible first-hand information.