加拿大论文格式：GIS数据库技术的改变作用
加拿大论文格式：GIS数据库技术的改变作用
大约20年前,所有数据库系统是用来面对的问题数据完整性、数据安全、数据恢复和备份数据库的数据和并发的巨大变化。很难处理这些数据库的问题在不同的应用程序之间共享信息和不同的服务器(Batty,1992)。
早些时候GIS信息被存储在一个两步。图形信息分别存储在专门的数据结构,而字母数字数据存储在关系数据库中。这主要是由于性能问题。这被称为非数据库的方法,面临的最大问题,图形和图形方式保存在两个不同的数据结构。
在这一点上的时候,IBM进入图片与面向对象的方法。根据这种方法,管理的对象是软件和工具由IBM和所有对象的属性,如字母数字,图形表示等存储在关系数据库中。工具是地理经理的名字。这种方法被用来存储和管理GIS数据,没有进行分析和操作数据。
加拿大论文格式：GIS数据库技术的改变作用
About 20 years ago, all database system was used to face the problem of data integrity, data security, data recovery and back up of databases because of the enormity of data and concurrent changes. It was difficult to handle these databases along with the problem of sharing information among different applications and different servers (Batty, 1992).
Earlier GIS information was stored in a two-step way. Graphical information was stored separately in dedicated data structure, whereas alphanumeric data was stored in relational database. This was mostly done because of performance issues. This was known as non-database approach, which faces the biggest problem that graphical and non-graphical was kept in two different data structure.
At this point of time, IBM came into picture with an object oriented approach. According to this approach, the objects were managed by software and tool launched by IBM and all the attributes of an object such as alphanumeric, graphical representation, etc. are stored in relational database. The name of the tool was geoManager. This approach was used to store and manage GIS data, not for analysis and to manipulate data.
