适用oracle oci接口读写数据库中的几何实体，做gis开发的可以学习一下-applicable oracle database columns read and write interface to the geometric entities, do gis development can learn about

Abstract: Now we are in a high degree of expansion of the information age. People with more and more information, almost doubled compared to the past as the geometric growth. People on the information processing tools - computers increasingly demandi

摘要：现在我们处在一个信息量高度膨胀地时代。人们处理的信息越来越多，几乎比过去成几何倍数的增长。人们对信息处理工具－计算机的要求越来越高。本汽车销售管理系统是为满足企业汽车销售前期和后期的流程实践需求而作的，该系统是以vs2003为前台开发工具，Microsoft SQL Server 2000作为后台数据库开发的。 本文以管理信息系统建设中的汽车销售系统的开发为背景，论述了管理信息系统的概念、结构及系统开发的基本原理和方法，首先从系统的开发工具和主要技术进行论述，然后从系统的定位结构设计，

Another advantage is that geometric properties of the curve are easily determined from a particular level set of the surface . For example, the normal vector for any point on the curve C is given by: