科学绿化地理场景的动态符号设计与多尺度表达

Dynamic symbol design and multi-scale representation of scientific greening geographical scene

作为城市建设高质量发展的重要环节,科学绿化采用新时代背景下的新型测绘手段,为国土绿化行动提供全方位技术保障。基于人对空间图形的认知规律和地图的空间表达能力,使用地图符号对科学绿化核心要素进行可视化表达,可提高大众对城市绿化的整体认知,使科学绿化理念深入人心。地图符号表达在科学绿化领域中的研究较少,传统方法在具体设计中多以模拟示意为主,难以传达专题特性。本文基于地图学新概念“地理场景”,以动态地图符号设计方法为指导,构建多尺度科学绿化动态场景:依据省级大尺度、区域级中尺度、地块级小尺度的场景特征,通过多符号设计参量组合,基于各尺度动态特性实现绿化要素动态符号设计;为使受众有更优的阅读体验,遵循信息详细程度与视点观察距离呈反比规律,构建连续多比例尺场景实现自适应切换,从而为科学绿化场景表达提供支持,辅助绿化管理部门分析决策。

As an indispensable key element in the high-quality development of urban construction,the new surveying and mapping technology has been adopted for scientific greening.It provides an all-round technical guarantee for national land greening actions.Based on the human cognitive law of spatial graphics and the spatial representation ability of the map,the utilization of map symbols to visualize the key elements of scientific greening can improve the public s overall knowledge of urban greening and make the concept of scientific greening deeply rooted in people s hearts.Little attention has been paid to scientific greening by map symbols.The traditional design is mostly based on simulation,which is difficult to convey thematic characteristics.Under the new concept of“geographical scene”in cartography,the multi-scale scientific greening dynamic scene by the dynamic map symbol design method is constructed in this study.According to the scene characteristics of provincial large-scale,regional medium-scale and plot level small-scale,it integrates multiple symbol design parameters and emphatically highlights the scientific greening attention indicators for each scale based on dynamic characteristics.In addition,a continuous multi-scale scene for switching adaptively for a better reading experience is designed.This is based on the inversely proportional relationship between information details and viewpoint observation distance.In general,the proposed approach may provide support for the representation of scientific greening scenes and assists in the decision-making of greening management departments.