基于公路GIS的中线里程值实时显示算法  

Real Time Display Algorithm of the Centerline Mileage Based on Highway GIS

作　　者：李爱民[1] 赵远方[1] 姚付良[1] 

机构地区：[1]信息工程大学测绘学院,河南郑州450052

出　　处：《北京测绘》2007年第3期27-29,26,共4页Beijing Surveying and Mapping

摘　　要：在公路GIS中,隧道、桥梁、涵洞、排水槽等的具体位置都是通过公路中线里程桩(桩号)来确定的,为将这些目标标定在图上或在图上实时显示出公路里程值,必须将桩号换算成地图坐标或将公路在地图上的坐标换算成桩号。本文结合某一公路地理信息系统的开发实例,探讨了公路中线里程值实时显示功能实现的原理和算法,并利用编程语言VB6.0与MapX控件实现了这一功能。Accurate location of some highway installations, such as tunnels, bridges,culverts or drains are labeled through the highway centerline mileage in Highway Geography Information System （GIS）. The highway centerline mileage must be conreted to map coordinates for these objects, then the map coordinates must be conreted to mileage number for real time display on the electronic map. In this paper, the principle and algorithm of real time display of highway centerline mileage are discussed with an example of a certain highway based on VB6.0 and MapX controls.

关 键 词：GIS AtiveX控件 MAPX 事件 方法 

分 类 号：P208[天文地球—地图制图学与地理信息工程]