Geographic information system ( gis ) is a branch of information technology , which integrates computer science , topography , remote sensing and mathematics to collect , measure , analyze , store , manage and display all the data related to geographic spatial distribution 地理信息系统则是应用计算机、测绘、遥感以及应用数学技术，来采集、测量、分析、存储、管理和显示与地理空间分布有关的数据的一门信息科学和技术。
Webgis i s a new technology which using the internet technology to expend and consummate the geography information system . man can use it to find the geography spatial d ata , picture and image they need , and also can use it to do some geographical sp atial analysis Webgis是利用互联网技术来扩展和完善地理信息系统的一项新技术，人们可以利用它寻找他们所需要的各种地理空间数据、图形和图像，而且可以进行地理空间分析。
Post logistics general in the city with the distribution line choice faces many complex customer information and complex urban road traffic information and customer complex geospatial information ; this is the need for a support system to provide the data 邮政物流一般是在城区进行的,配送路线的选择面临着多个客户的复杂信息以及城市复杂的交通道路信息和客户复杂的地理空间信息,这时就很需要一个能够提供这些数据的支持系统。
In geography space , compared with spatial topological relations , spatial direction relations without doubt have more abroad applications and more closed to the human ’ s life , they should occupy more important position and exert greater effect in spatial information field 在地理空间中,与空间拓扑关系相比较,空间方位关系无疑是用途更广泛、更贴近人们生活的一种空间关系,在空间信息领域应该占有更重要的地位和发挥更大的作用。
