基于OpenGIS CityGML的外观模型探讨  

Discussion on the Appearance of the Model Based on OpenGIS CityGML

作　　者：关颖[1] 童凌飞[1] 张旭冬[2] 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000 [2]苏州工业园区测绘有限责任公司,江苏苏州215021

出　　处：《城市勘测》2013年第1期51-55,共5页Urban Geotechnical Investigation & Surveying

摘　　要：根据当前三维城市GIS中的虚拟城市模型中存在的不足提出了CityGML的外观模型,它是虚拟3D城市模型中除去语义和几何特性之外的重要特性,探讨分析了外观模型中外观与要素和几何关系,与外观模型相关的表面数据的作用以及材质、纹理和纹理映射的使用,研究了纹理坐标、纹理包装模型、纹理映射函数及其转换矩阵,同时给出了外观模型的具体应用实例。This article proposes the appearance model of CityGML fl＇om the lack of a virtual city model of the current 3 Deity GIS, il is important characteristics in a virtual 3D city model except semantic and geometric characteristics, analy- zes the relationship between feature and geometry in the appearance model and the function of the surface data related to the appearance mold related and make use of material, texture and texture mapping, studies the texture coordinates, the texture of packaging model ,texture mapping function and its transformation matrix,and the concrete application example of Ihe al）pearance model is given simultaneously.

关 键 词：CITYGML 外观模型 纹理 

分 类 号：P208.2[天文地球—地图制图学与地理信息工程]