土地利用现状遥感修编调查的必要性及技术可行性

Feasibility of Using Remote Sensing to Update Land Use Information

研究目的:目前欠缺对遥感技术在土地利用现状调查中产生的误差大小,以及其能否满足土地利用现状调查精度要求这方面的定量分析研究工作。从遥感混合像元成像原理、误差产生过程、随机误差的概率分布等方面分析了遥感调查误差的大小。研究方法:定量分析法。研究结果:采用SPOT-5遥感数据进行土地利用现状修编调查是一种经济有效的方法;同时提出了具体的工作方法步骤,以保证修编调查成果的精度。

The land use information investigated in 1980's is already out of date while fine land management is required in nowadays politic arena, and incapable of meeting urgent need of new round of land use planning. It is accepted to update land use information within a short period by means of remote sensing. However, few quantitative studies have been undertaking about errors formed in practical process of data dealing and transforming and whether remote sensing is suitable economically in mass investigation of land use. In this paper, quantitative study of errors has been made based on fundamentals of mixed-pixel image, error-generating process and stochastic distribution of errors. It comes to a conclusion that SPOT-5 data is an economical and effective option as data source for mass investigation of land use. Given precision demands of the deliverable in mass investigation, refined technique process and approaches have also been given as recommended.