摘要
针对大比例尺地形图中建筑物面数据自动拉伸为三维模型时,无法体现屋脊特征的问题,提出了通过对建筑物轮廓进行特征分析,自动识别直线形、L形、U形等特殊形状,过滤建筑物凸窗等细小特征,采用构建三角网实现自动提取建筑物屋脊线的算法。算法可对单坡、双坡、四坡、四角攒顶等屋脊类型加以区分,根据提取后的屋脊线,可通过SuperMap等GIS平台,自动将建筑物矢量面自动拉伸为表现细节的三维模型。
When the data of the building surface in the large-scale topographic map is automatically stretched into a three-dimensional model,the problem of the roof feature cannot be reflected.It is proposed to identify the linear,L-shaped,U-shaped and other special shape by analyzing the contour of the building.To filter small features such as building bay windows,an algorithm for automatically extracting the roof line of a building is constructed by constructing a triangulation network.The algorithm can distinguish the types of ridges such as single slope,double slope,four slopes and four corner domes.According to the extracted ridge line,the vector plane of the building can be automatically stretched into a three-dimensional model with detailed expression through SuperMap and other GIS platforms.
作者
赵鹏飞
林占云
杨继文
ZHAO Pengfei;LIN Zhanyun;YANG Jiwen(The Fifth Surveying Mapping and Geographic Information Engineering Institute of Heilongjiang Province,Harbin 150081,China)
出处
《测绘与空间地理信息》
2020年第S01期231-233,共3页
Geomatics & Spatial Information Technology
关键词
建筑物轮廓
屋脊线
三维模型
building outline
ridge line
three-dimensional model
