According to the difference of dimension and shape of parts, the dissertation identifies and orients them by position, area, circularity, and rectangularity.

根据零件之间的尺寸和形状差异性，利用位置、面积、圆形度和矩形度等特征参数对它们进行识别和定位。

Based on figure characteristics of building-polygon, two models of simplification and rectangularity of building-polygon in map generalization were presented in the paper.

依据建筑物多边形的图形特点分析了其在地图综合中两类处理模型：化简与直角化。