摘要
现有模型对影像数据中的地理对象进行多尺度表达很困难,鉴于全球剖分模型在对地理对象表达时所具备的全球唯一性、层次性、多尺度性、编码具有地学含义等特点,提出了面向地理对象多尺度表达的剖分编码方法,目的是对地理对象赋予统一的剖分编码,使编码具有地学含义和多尺度特性。实验证明,面向地理对象多尺度表达的剖分编码方法可以满足地理对象多尺度剖分化表达的需要,为新一代GIS解决地理信息"尺度鸿沟"问题,向用户提供"连续"、"自适应"的表达尺度奠定了基础。
The traditional GIS lack theories and methods in multi-scale processing of spatial data.A new generation of GIS should have the capabilities of multi-scale,multi-resolution expression and application of geographic objects.The emergence of Global Subdivision Grid（GSG） offers a new insight for multi-scale encoding and the expression of geographic objects.Based on GSG,a new multi-scale expression oriented subdivisional encoding method is proposed,aiming to give the geographic object an integrated subdivisional code,which has geographical meaning as well as multi-scale feature.Experimental results demonstrate that subdivisional code based on GSG can efficiently organize and management geographic objects,and therefore can be utilized for the multi-scale expression of geographic objects.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2010年第5期33-36,共4页
Geography and Geo-Information Science
基金
国家重点基础研究发展计划(973)项目
关键词
GIS
全球剖分模型
EMD模型
多尺度表达
剖分编码
GIS
Global Subdivision Grid（GSG）
EMD model
multi-scale expression
subdivisional code
