Object styles of spatial entity for field geological mapping based on object - oriented method 面向野外地质填图的空间实体对象表达
The formation of certain clan accompanies with the process in which the settlement of sanxi shaped as a spatial entity 宗族的形成与三溪作为空间聚落的形成过程彼此一致。
The system adopts spatial data model based on the vector data model ; topology relation model uses spatial data model combined with spatial data index ; and makes use of relation database to save spatial entity data 本系统采用基于矢量数据模型的空间数据模型;拓扑关系模型采用空间数据模型与空间数据索引结合;采用关系数据库存储空间对象数据。
The second and third chapters , each discusses the process of which the settlements of sanxi formatting a spatial entity gradually from a diachronic vision , and on the other hand , finds the cultural characteristics of the settlement as a whole , are the core of the entire narrative 第二章与第三章为全文的核心部分,分别从纵向的历史的角度讨论三溪聚落空间逐渐形成的过程;并以聚落作为整体,讨论其自身的文化特质。
Gis ' s essential idea lies in combining the spatial geography graphic data with their expressed information , so realize to update graphic data and property information of spatial entities synchronously , to query bidirectionally , and to edit and operate graphic data Gis的基本思想在于把空间地理图形数据和其代表的地理信息有机地结合起来,从而实现了空间实体的图形数据与属性信息的同步更新,双向查询,以及图形数据的操作与编辑。
Originated from geographic information technique , spatial decision supporting technique can offer corresponding spatial knowledge and decision supporting for information management , process control and scientific research , etc . this thesis addresses itself to the basic conception and development of the current spatial decision supporting technique , analyzing the characteristics of spatial data and spatial entity and spatial decision supporting and discussing the realizing methods of spatial decision supporting 源于地理信息系统的空间决策支持技术,可以为信息管理、过程控制、科学研究等提供相应的空间知识与决策支持。本文首先对当前空间决策支持技术的基本概念和进展作了论述,对空间数据、空间实体、空间决策支持的特点进行了分析,讨论了空间决策支持的实现方法。
As far as model is concerned , the forth generation software should be characterized with spatial entity - oriented . the paper established the geographic spatial model based on the thinking of object - oriented ; studied the structure of the model " s elementary unit - - geographic entity ; brought forward the concept of geometric data type which characterize entity ' s spatial feature in the structure ; defined five kinds of geometric data types such as point , arc , area , composite arc , composite area ; and formalized their collective operation using hypergraph . at the end of this paper writer studied preliminarily the method of entity query and analysis based on the model 本论文从面向对象的基本思想出发,建立了面向对象的地理空间模型;研究了地理空间模型中的基本单位? ?地理实体的结构,针对实体结构中用来表征实体空间特性的组成部分? ?几何对象,提出了其取值范围,即几何数据类型的概念;对点、弧、面、复合弧和组合面五种几何数据类型进行了定义;并使用超图工具对几何数据类型的集合操作进行了形式化描述;对基于面向对象的地理空间模型的实体查询和分析方法也做了初步研究。