草图直接成图的外业房产测量算法研究

Research on Algorithm of Real Estate Surveying Based on Generating Map Directly from Sketches

传统的房屋测量外业纸质草图无法被计算机直接处理,内外业分离,效率低,易出错。针对上述问题,首先研究了触摸功能生成草图的方法,系统将草图自动规整并生成规则且符合实际情况的房屋图形;然后研究了基于矢量图形的轮廓跟踪算法,设计了水平和垂直两个复合链表动态构建尺寸链,实现了草图约束的求取和自动参数化重绘,从而实现了房屋面积的自动计算、图文自动关联和报表自动生成,并确保外业成果可直接导入计算机。最后在Android系统上开发了一个支持上述功能的软件系统,并验证了前述算法的有效性。

The traditional paper-based sketch of external house survey can not be processed directly by the computer.And the separation of internal and external businesses is inefficient and error-prone.Considering the above problems,the method of generating sketch by touch function is studied firstly.The system automatically generates the regular house graphic which is consistent with the actual situation based on the sketch.Then,the contour tracking algorithm based on vector graphics is studied,and the horizontal and vertical compound linked lists are designed to build dimension chain dynamically,which realizes the construction of sketch constraints and automatic parametric redrawing.In this way,the automatic calculation of the house area,the automatic correlation of graphic and data and the automatic generation of reports are realized,and the results can be imported directly into the computer.Finally,a software system that supports the above functions is developed in the Android platform,and the effectiveness of the aforementioned algorithm is verified.