AN OBJECT-ORIENTED MODEL FOR REPRESENTATION LIFESPAN OVER SCALE SPACE
Multiple representation of spatial data, which means obtaining different detailed representation of geographic phenomena based on the same spatial database or different data versions, is one of the key technologies for digital earth. It plays an important role in such applications as seamless data navigation, progressive web transfer and self-adaptable visualization. Multiple representation technology meets the contradiction between data volume and high granularity representation. This paper aims at the objective by small size of data volume to realize high granularity representation, presenting a concept, namely representation lifespan over scale space to describe that the spatial data has different representation scene in scale space. The scale transformation is represented as tij: < fi, [si1],[si2],{gij}>, where fi is the transformation function, [si1],[si2] the scale range controlled by two key scale points si1 and si2 and {gij} the base representation status associated with the key scale point of si1 of si2. the study summaries that there are four transformations, namely generalization, LOD accumulation, morphing and extraction.
Cartography Generalization Multi-Scale Representation Spatial Resolution Progressive Transformation
Tinghua Ai Jingzhong Li
School of Resource and Environmental Science, Wuhan University, 129 Luoyu Road, Wuhan, China, 430079
国际会议
北京
英文
1671-1677
2008-07-03（万方平台首次上网日期，不代表论文的发表时间）