基于SVG的空间定位模型

Spatial Location Model Based on SVG

空间定位是Web GIS的重要功能之一,可伸缩矢量图形(SVG)被认为是下一代WebGIS的重要开发工具,但它缺乏对空间定位信息的完整表达,无法在SVG地图上直接实现空间定位和转换。针对该问题,提出基于SVG的空间定位表达模型,定义形式化表达,设计并实现开放式、跨平台、可复用的SVG空间定位功能模块。应用实例证明,该模型能得到良好的可视化定位效果和精确的空间定位。

Spatial location is one of the most important functions in WebGIS.Scalable Vector Graphic（SVG） is considered an important developing tool of WebGIS,but it is lack of complete representation in spatial location,SVG can not realize spatial location and transformation in SVG map directly.Aiming at these problems,this paper proposes a SVG-based spatial location model and defines its formal representation.It designs and implements SVG spatial location function module,which is open,cross-platform and reusable.Applied example proves that the model can get good visualization location effect and accurate spatial location.