Javascript技术在遥感影像铁路专题制图自动化中的应用

Application of Javascript Technology in Railway Remote Sensing Image Thematic Mapping Automation

由于专题制图的非标准化、需求个性化等原因,基础地理信息数据处理效率一直没有得到有效提升。基于Photoshop遥感影像铁路专题制图技术已经得到广泛应用,将Javascript技术应用于制图二次开发,调用Windows及Photoshop的API接口,将常用绘图功能、制图函数、主要参数以及快捷键进行封装,以实现遥感影像的批处理,以及专题地图要素处理的自动化以及地图要素修改的人机交互。研究分为3个部分,(1)介绍Javascript二次开发的环境配置、编译平台以及成果调用。(2)提出Javascript技术的4种应用场景:①图像批处理;②自动绘制专题地图要素;③图内要素的批量全自动修改;④图内要素的人机交互处理。(3)以欧洲某铁路遥感影像专题制图为例,验证该方法的可行性。研究结果表明,该方法可以大幅提高制图效率,实现地图符号绘制的规范化,解决了全自动批处理脚本运行数据冗余大、执行效率低等问题。

Due to the non-standardization and the personalized need of thematic mapping,the processing efficiency of basic geographic information data has not been effectively improved.The thematic mapping technology based on Photoshop has been adopted in railway industry widely.This paper applied the JavaScript technology to the secondary development of mapping,called the API of Windows and Photoshop,and used common mapping modules,mapping functions,main parameters,and hotkeys to encapsulate packages.It realized batch processing of remote sensing images,automatically processing of features on thematic map,and modification of map features in human-machine interaction manner.The research includes three parts:(1)The introduction of the configure environment,compile platform,and result of secondary development based on Javascript.(2)The application of four application scenarios for JavaScript technology:①Image batch processing to achieve automatic spectral enhancement of remote sensing image.②Automatic mapping for thematic map elements.③Batch and automatic modification of features on maps.④processing of elements on the map in human-machine interaction manner.(3)The example of the thematic mapping of a railway project in Europe using remote sensing image for the verification of the feasibility.The results show that the technology can significantly improve the mapping efficiency,make it easier to standardize drawing map symbol,and solve the problems on high redundancy of data and low efficiency of execution during batch and automatic processing scripts.