地理信息系统中的矢量数据及投影算法运用

Application of Vector Data and Projection in GIS

地理信息系统在应用于航空、航海等活动场景时,需要加载对应的二维航空矢量地图、二维航海矢量地图。在地理信息系统中,二维矢量地图的运用离不开投影算法,不同的投影算法也应用于不同的使用场景。首先,介绍了在地理信息系统二维地图中常使用的地图矢量数据和相关的投影算法;然后,简要地分析了使用不同投影、不同矢量数据的地理信息系统在协同作业方面存在的问题;最后,指出在不同投影、不同矢量数据情况下,不能简单地基于显示效果来判断目标的位置,而应该根据计算结果来详细分析,对于目标位置的准确确定具有一定的指导意义。

When GIS is applied to aviation,navigation and other activity scenarios,it is necessary to load the corresponding two-dimensional aviation vector map and two-dimensional navigation vector map.In GIS,the application of two-dimensional vector map is inseparable from the projection algorithm,and different projection algorithms are also used in different usage scenarios.Firstly,the map vector data and the associated projection algorithms that are frequently used in GIS are introduced.Then,the problems of collaborative operation of GIS with different projections and different vector data are analyzed.Finally,it is pointed out that in the case of different projection and different vector data,the position of the target should not be judged simply based on the display effect,but should be analyzed in detail according to the calculation results,which has certain guiding significance for the accurate determination of the target position.