摘要
GIS以表示地理信息的数据库为核心 ,以同时描述空间数据和属性数据为最基本的特征。将不同尺度、不同时期、不同来源的地理数据精确定位于公共的地理基础之上 ,是实现GIS目标的基本要求。不同投影之间的互相转换以及投影类型或参数的选择对GIS数据的输出结果有极大影响。本文通过对地图投影的分类、经纬线特征、变形分布的分析 。
Taking geo-database as the core, GIS is characterized by describing spatial and attribute data simultaneously. Positioning multi-scale, multi-temporal or multi-source geo-datasets to a common geo-base is a basic requirement for the realizing of GIS purpose. The transformations between two different projections or the option of parameters have a great effect on the results of GIS. After an analysis on the classification and features of latitude and longtitude net and the distribution of distortion of map projections, this paper studies the transformation ways and the selecting methods of map projections.
出处
《东北测绘》
2001年第4期21-25,共5页
Northeast Surveying and Mapping
