基于3S的巴彦县农村居民点内农地测算研究

Measurement and Estimation of Farmland in Rural Residential Spots of Bayan County based on 3S

研究目的:在ArcGIS及ERDAS平台上应用SPOT5遥感影像,结合GPS实地样点测量,研究农村居民点内农地数量的测算方法。研究方法:3S技术与典型样点实测相结合。研究结果:巴彦县农村居民点内农地面积占居民点面积的10.1%。研究结论:影像解译获取农村居民点面积及其内农地所占比重,实地抽样量测农村居民点内农地获取影像解译面积校正系数,测算农村居民点内农地准确值的方法,在东北农村有推广价值。

The purpose of the paper is to study the measurement and estimation method of farmland in rural residential spots using SPOT5 remote sensing image on the platforms of ArcGIS and ERDAS and supplemented with GPS field sampling. Method is to combine 3S technologies with typical sampling. The results indicate that farmland area in the residential spots of Bayan County is 10.1% of the total area. It is concluded that the proposed measurement and estimation method in the paper can be recommended for rural areas in northeast China. The proposed method includes three steps： （1） to obtain areas of rural residential spots and the ratio of inner farmland through image interpretation; （2） obtain area correction factors for image interpretation through field sampling and measurement on farmland in typical rural residential spots; （3） calculate the accurate value of farmland in rural residential spots.