CAD地图的快速发布及在移动设备中应用  

Rapid publication of CAD map and its applications to mobile device

作　　者：孙玉龙[1] 茅志兵[1] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098

出　　处：《测绘工程》2014年第3期50-54,共5页Engineering of Surveying and Mapping

摘　　要：以电子航道图为例,提出CAD地图快速发布及在移动设备中应用方案。首先使用ObjectARX将CAD图在服务端发布成文档矢量图切片,客户端加以下载并渲染成不同缩放级别的透明位图,然后和客户端本地栅格底图切片在相同的投影变换下叠加,实现不同缩放级别下CAD地图和底图的概览和细节展示。此方法与使用整幅CAD地图显示方式相比,所需的内存消耗、网络传输量及运算耗费都减小,达到移动客户端CAD地图的快速浏览的目的。One rapid CAD map publishing technique and its apphcanons to mobile clevlces is proposeu for electronic waterway map case study. Firstly the CAD drawings are sliced on the server by ObjectARX Api technique into document vector, which then are downloaded and dynamically rendered into transparent bitmap in a different zoom level for the client; secondly background raster maps which have been transformed into the same projection are superimposed for the client to achieve both overview and detailed display of the CAD maps in different zoom levels. Compared with whole sheet CAD map browsing method, this technique needs less memory consumption, less network traffic, reduced computing, and quick CAD map browsing for mobile client.

关 键 词：CAD 移动设备 发布 电子航道图 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]