宗地的封闭性检查①

作为GIS基础数据来源的数字地籍图大多都是基于AutoCAD平台的。和GIS数据不同。它们不注重实体间的闭合性，拓扑关系等问题。宗地的封闭性检查是CAD数据与GIS数据进行数据转换以及地籍数据入库前矢量数据标准化的重要组成部分。从进行宗地封闭性检验的技术基础、理论基础以及宗地不闭合的成因出发，探讨了进行宗地封闭性检验的技术流程，并阐述了利用AutoCADVBA作为开发语言，采用AutoCAD ActiveX技术，在AutoCAD2005平台上进行二次开发，实现了宗地封闭检验和人机互动修改的方法；解决了在AutoCAD平台下进行地籍数据入库及地籍成果输出等问题。

A New Approach of Enclosure Test for Ancestor Parcel

A number of digital cadastral maps that act as the GIS data sources are based on the AutoCAD platform. Different from GIS data, they do not pay much attention to closure property, topological property and other issues. The closure property test of ancestor parcel is an important component of the conversation of CAD data and of Standardization GIS data and that of Vector Data before cadastral data populated the database. In this paper, the ancestor parcel closure property test is conducted from the technological and theoretical base and the reason is investigated why the ancestor parcel is not closed. It also discusses the flow of testing ancestor parcel closure property, and introdnces a new method by using the technology of AutoCAD ActiveX. The second development is made under AutoCAD 2005, and the ancestor parcel test and the human-computer interaction revision are illuminated. And the problem of results output and ancestor data entering under AutoCAD is addressed. The discussion and research on ancestor parcel test has practical significance for GIS data standardization, and can accelerate cadastre information system construction.