共查询到20条相似文献,搜索用时 20 毫秒
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WEIWenzhan ZHONGYexun PENGYueying ZHENGHongbo 《地球空间信息科学学报》2003,6(3):62-65
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地图线状符号图案单元的优化配置方法 总被引:9,自引:2,他引:9
在分析地图线状符号的分解与组合等特征的基础上,提出了线状符号的优化配置方法和常见的线状符号之间的空间关系的处理方法,并着重讨论了顾及格式塔理论的虎线型线状符号优化配置算法。 相似文献
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统计制图符号是用来表达统计数据类型的专题符号,是制图者理解数据与用图者认识数据之间信息与传递的重要桥梁。通过对统计制图符号的分类、空间布局和内部构成元素的深入分析,提出了一种利用空间布局构建统计制图符号的方法。阐述了空间布局约束下统计制图符号的形式化描述和组织方式,设计了统计制图符号生成的基本流程,依次构建了视觉变量、布局约束下的图元及统计制图符号。实验表明,该方法能够突破传统统计制图符号对数据依赖性强且构建复杂的局限,丰富统计制图符号的种类,具有一定的实际应用价值。 相似文献
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地图符号的认知语义分析与动态生成 总被引:1,自引:0,他引:1
面向位置服务背景下地图符号按需和动态表达的需求,提出了一种基于认知语义分析的地图符号结构化描述模型,以及建立在此基础上的地图符号动态生成方法。结构化描述模型立足"现实—认知—符号"的认知语义原理,以地图符号语素为基本单元、以语义结构为描述框架,侧重描写符号图形和语义之间的关联映射机制。动态生成方法的核心是一种规则控制语素组合构造符号的上下文无关文法模型,通过对图形语素、形态结构语素以及符号生成规则系统进行建模,重构了地图符号动态生成的文法编译器。以个性化导航路径符号为例,通过面向不同情境和语义结构的符号动态生成试验,验证了本文方法的可行性。本文研究将有助于进一步理解地图符号的认知和结构原理,并促进相关行业和应用领域地图符号化的按需和动态表达的水平。 相似文献
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《The Cartographic journal》2013,50(3):257-261
Abstracttitle/>Patterns consisting of point symbols are commonly applied to symbolize land cover. Tree symbols, for example, indicate forested areas; small irregular dots show quarries and pits; or regular line symbols represent a vineyard. This paper presents an automatic method for synthesizing patterns consisting of one or more point symbols. Symbols of varying sizes or graphical appearance can be combined according to user-defined ratios. The automatic method generates patterns of regularly or irregularly distributed symbols. It ensures that symbols do not overlap and do not graphically conflict with other map features. The method has been implemented in a free plug-in for the Adobe Illustrator vector graphics editor. 相似文献
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点线面状地图符号定义的简化与统一 总被引:8,自引:1,他引:8
从制图物体到地球椭面的映射f,椭球面到主体认识结构的映射g和主体认识结构到二维平面的映射q三重拓朴映射的存在性入手,推导了地图符号的一般表达式。再从点状、线状和面状地图符号均以图的某一部分为定位依据的共同特征,推导了简化的点状、线状和面状地图符号的数学定义,从而使这三类地图符号获得了简化和统一。 相似文献
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在县级土地整治规划中,ArcGIS自带符号库不能很好地表达规划信息,需建立规划专题符号库。本文介绍了基于Font Creator5.6字体编辑器和ArcGIS符号管理器制作点、线、面符号的步骤和方法。在此基础上依据TD/T 1021-2009《县级土地利用总体规划制图规范》建立专题符号库。该符号库的设计方法简单、快捷,具有实用价值。 相似文献
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The authors attempt to identify and standardize the cartographic symbols (“images”) used to represent a variety of specific geomorphological features. A large number of cartographic representations of landform features found on geological-geomorphological maps are classified in terms of their basic pattern/configuration and the level of complexity within each major pattern type. It is argued that the pattern or configuration of a cartographic symbol used to represent a geomorphological feature should represent the spatial structure of that feature with sufficient reliability to serve as a key to an understanding of its genesis. Translated from: Geomorfologiya, 1987, No. 2, pp. 62-66. 相似文献
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《The Cartographic journal》2013,50(3):229-244
AbstractThe age of the Internet poses new challenges to cartography. While cartographic animation has become a practical alternative, it is mostly used to depict both spatio-temporal and non-temporal changes. The paper concentrates on the use of dynamic symbols on a static base map. A visual test was carried out to obtain some perspectives about the cartographic communication of blinking point and line symbols. The results confirmed that dynamic symbols tended to attract the attention of the users in general and even in situations when the foreground–background contrasts were poor. Their effectiveness was more pronounced with symbols of a larger size but tended to diminish with an increasing number of blinking symbols. It was also observed that users were able to perceive differences in the frequency of flickering, particularly when the variation was large. The line animation method (marquee and grow-out) did not yield a substantial difference in visual responses in the case of blinking line symbols. 相似文献
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none 《The Cartographic journal》2013,50(2):136-145
AbstractTo enhance the variety of map symbols and to develop new symbol types, a fundamental understanding of the map symbol construction process is mandatory. Current construction theories focus on diagrams without taking georeferencing or interactivity into account. This paper presents a new methodology for the creation of two-dimensional geometric symbols and diagrams for the application in thematic maps. In this context, 49 diagrams found in cartographic literature were analysed and classified regarding their construction properties. As a result of this research, diagrams can be defined using cartographic primitives which are arranged according to six arrangement principles. Since the variation of the primitive's size according to the data values follows a certain geometric direction, each diagram can be explicitly defined based on the three construction properties 'primitive', 'arrangement principle' and 'data direction'. 相似文献
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点状、线状和面状地图符号数学定义的研究 总被引:5,自引:2,他引:5
根据集合论和拓扑学的有关理论,导出了点状地图符号、线状地图符号和面状地图符号的数字定义。阐述了图形和背景的相互依存关系以及它们在传输地理信息中的整体功能。 相似文献
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物质世界的不同层次中的事物都具有随时间演化的特性。制图区域内事物的演化使制图区域在不同时刻有不同的状态。在t>t0时,依据制图物体从属于制图区域不同状态的条件,可定义现势地物、消亡地物和新生地物。根据拓朴映射原理,给出了地图符号的一般式,再根据制图对象的时态特征,定义了现势地图符号和失真地图符号。利用同一图上现势地图符号集和失真地图符号集互为补集的关系,提出了地图现势值公式,从而实现了地图现势性概念的定量刻划。由于本公式仅涉及失真符号的面积量算并对经验事实具有解释功能,因而有广阔的应用前景。 相似文献
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王丽 《测绘与空间地理信息》2015,(8)
依据我国标准地形图图式规范和基础地理信息要素分类标准,结合AutoCAD和Illustrator软件制作点状符号,利用ArcGIS符号管理器进行各种地图符号的绘制,使得制作的地图符号在可视化表达时能够与我国标准地形图图式保持一致。 相似文献