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- 2018
空间数据连续尺度表达的矢量金字塔模型
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Abstract:
连续多尺度表达是当前地图制图领域中的热点问题之一，常规地图采用多级瓦片剖分、多版本存储技术实现空间多尺度表达，存在数据量冗余、跨级别不一致、瓦片间尺度跳跃大等问题。结合传统地图综合、多尺度表达数据结构和空间索引建立等多种策略，在目标数据模型中加入尺度维和操作信息，记录地图综合的过程和尺度变换，建立空间数据矢量金字塔模型。该模型离线综合获取多级基态尺度表达数据，确定每个目标的尺度表达空间范围，并通过面向对象建模技术将目标表达状态及其纵向关联关系、算子类型及控制参量等信息封装在多尺度目标中；同时，建立一端或两端控制的尺度变换结构。基于该模型可快速获取适应用户需求的连续尺度表达状态
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