摘要
地物是数字地形图的十分重要的要素之一。数字地形图中的地物是通过连接地物轮廓特征点组成轮廓线绘制而成的,地物轮廓特征点是测量获得的,由于测量存在误差,导致同一地物的轮廓线、不同地物的轮廓线之间可能存在的平行、垂直、直圆相切等条件不能严格成立。为解决此问题,本文以地物轮廓特征点的坐标为观测值,提出了一种基于地物几何关系的平差模型。实验证明,基于地物几何关系的平差方法较好地解决了这类问题。
Surface features are one of the important elements to digital topographic map.The surface features of digital topographic map are drawn by connecting features contour lines composed of feature points.These points are measured with measurement errors so that the contour lines between same surface features or different objects may exist non-strict geometric condition of parallel,perpendicular and tangent of circle and straight.To solve this problem,the paper took the coordinates of feature points as observations to propose an adjustment model based on geometric relationship of surface features.Experimental results showed that the method was effective.
出处
《测绘科学》
CSCD
北大核心
2012年第1期92-93,118,共3页
Science of Surveying and Mapping
关键词
地物
条件平差
矢量
条件方程
surface features
condition adjustment
vector
condition equation
