地理实体模型视角下的建筑物多粒度表达

Multi-granular representation of buildings from perspective of geographical entity model

新型基础测绘中地理实体建模是一个重要任务,地理实体建模有别于传统的图形化、目标化建模,其中多粒度表达为显著特征之一。本研究以建筑物实体为例,基于实体多层次构造的part-of关系和被表达的细节层次(LOD)特征,提出了一种建筑物实体多粒度表达模型,将尺度变换行为封装在面向对象模型中,构建不同比例尺段的尺度操作,研究提出了全面表达建筑物地理实体的思路,有助于丰富用户使用地图产品时的体验感,满足对地理实体不同层次、不同尺度认知和分析的需求。

Geographic entity modeling is an important task in new fundamental surveying and mapping.Geographic entity modeling is different from traditional graphical and object-based modeling,in which multi-granularity representation is one of the obvious characteristics.Taking the building entity as an example,this paper proposed a multi-granularity representation model of the building entity based on the part-of relationship of the entity’s multi-level structure and the expressed level of detail(LOD)features.The model encapsulated the scale transformation behavior in the object-oriented scheme,and it constructed scale operations of different scale segments.This paper proposed an idea to comprehensively express the geographical entities of buildings,which helps to enrich users’experience when using map products and meets the needs for cognition and analysis of geographical entities at different levels and scales.