A COM-based Framework for Management,Analysis and Visualization of Large Scope Digital Elevation Models  

作　　者：WANGYongjun GONGJianya 

机构地区：[1]StateKeyLaboratoryofInformationEngineeringinSurveying,MappingandRemoteSensing,WuhanUniversity,Wuhan430079,China,129LuoyuRoad [2]不详

出　　处：《Geo-Spatial Information Science》2003年第3期32-36,共5页地球空间信息科学学报（英文）

摘　　要：This paper presents a component object model (COM) based framework for managing, analyzing and visualizing massive multi-scale digital elevation models (DEMs). The framework consists of a data management component (DMC), which is based on RDBMS/ORDBMS, a data analysis component (DAC) and a data render component (DRC). DMC can manage massive multi-scale data expressed at various reference frames within a pyramid database and can support fast access to data at variable resolution. DAC integrates many useful applied analytic functions whose results can be overlaid with the 3D scene rendered by DRC. DRC provides view-dependent data paging with the support of the underlying DMC and organizes the potential visible data at different levels into rendering.This paper presents a component object model (COM) based framework formanaging, analyzing and visualizing massive multi-scale digital elevation models (DEMs). Theframework consists of a data management component ( DMC), which is based on RDBMS/ORDBMS, a dataa-nalysis component (DAC) and a data render component (DRC). DMC can manage massive multi-scale dataexpressed at various reference frames within a pyramid database and can support fast access to dataat variable resolution. DAC integrates many useful applied analytic functions whose results can beoverlaid with the 3D scene rendered by DRC. DRC provides view-dependent data paging with the supportof the underlying DMC and organizes the potential visible data at different levels into rendering.

关 键 词：component object models digital elevation model VISUALIZATION geographicinformation system (GIS) 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P224[天文地球—测绘科学与技术]