文章基本信息

标题：FREEFORM CURVES AND SURFACES IN DBMS: A STEP FORWARD IN SPATIAL DATA INTEGRATION
本地全文：下载
作者：S. Zlatanova ; S. Pu ; W.F. Bronsvoort 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Spatial data integration is of great importance for many applications and particularly for emergency response. Besides the variety of challenges in 2D, increasing attention is given to integration of CAD and 3D GIS models. Many indoor models (needed for localisation and evacuation of people) or geological formations (needed for earthquakes or landslides) exist in CAD systems, but are often difficult (or impossible) to integrate with GIS models. Nowadays, a process of converging functionality is observed, but still many challenges remain. Amongst all these are the supported primitives. CAD software supports a broad range of primitives such as cone, sphere, cylinder and free-form curves and surfaces (NURBS, B-Splines, Bezier), which are not present in the GIS world. Open Geospatial Consortium has recognized the importance of freeform curves and surfaces and has included them in the Abstract Specifications, but no GIS software supports them. This paper presents our design of six new freeform data types to be considered for SQL Implementation Specifications
关键词：Databases; CAD; GIS; Data structures; Retrieval; Modelling; NURBS