时空数据空间特征的动态可视化模型  

Dynamic visual model of spatio-temporal data spatial feature

作　　者：周平[1] 唐新明[1] 张晓[2] 

机构地区：[1]国家测绘地理信息局卫星测绘应用中心,北京100830 [2]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《测绘科学》2013年第5期61-65,共5页Science of Surveying and Mapping

基　　金：国家科技支撑(2011BAB01B01)

摘　　要：本文以多时态地理现象空间特征的连续变化过程的动态可视化表达为研究对象,借鉴Flash中逐帧动画和形状补间技术的设计思想,提出一种以时间为驱动的时空数据之空间特征的动态可视化模型:设计一组适用点、线、多边形地理实体的空间特征的图形变形算法,用于在"关键帧"之间插值生成足够多中间时刻的地理现象的空间特征状态作为"中间帧";采用合适的地图动画时间比例尺,连续播放各个"关键帧"和"中间帧",最终实现逼真动画效果的空间特征动态可视化。The paper took the dynamic visualization expression of the continuous change process of the spatial characteristics of the multi-temporal geographical phenomena as the research object, based on the design principle of the frame-by-frame animation and shape tweening technology of Flash, proposed a dynamic visualization model for the spatial characteristics of spatial-temporal data which is driven by the event-time. In this research, a group of graph morphing algorithms which is suited for the spatial characteristics of the geographical entity including the point, line and polygon was designed. According to the proposed algorithms, enough ＂in-between＂ that represented the status of the spatial characteristics of the geographical phenomena at middle points among the ＂key-frame＂ could be generated by means of the interpolation method. By calculating the accurate time scale factor of the map animation, each of the ＂key-frame＂ and the ＂in-between＂ could be continuously played. Finally, this paper realized the animation effects of the dynamic vi- sualization of the spatial characteristics on the media.

关 键 词：时空数据 空间特征 动态可视化模型 图形变形 关键帧线性插值 

分 类 号：P208[天文地球—地图制图学与地理信息工程]