Abstract: Based on contour interpolation of DEM by way of 1:50000 scale relief maps in the Guide area, China, optimum size of analysis windows of local relief, which is 400×400m2, is defined by space analysis using ARCMAP software and curve estimation using SPSS software. Local relief of the Guide area has been extracted and mapped using this size of analysis windows, and relationship between elevation and local relief was analyzed, which accorded with the facts.