共查询到19条相似文献，搜索用时 109 毫秒
1.
在系统分析量化图形构成的基础上,从数学基础、内容图形和辅助要素三个方面阐述了二维坐标系量化图形展现的基本概念。 相似文献
2.
全曲轴坐标系图形量化方法及其在地学信息可视化中的应用 总被引：1，自引：0，他引：1
曲轴坐标系是对传统直线坐标系的扩展,由曲轴坐标系构成的量化图形造型丰富、活泼生动、组合方式多样,是量化图形发展的又一重要途径.全曲轴坐标系是曲轴坐标系统中的一类,是量化图形的数学基础之一.该文通过对全曲轴坐标系的构成、基础坐标网和组合图形的研究.展现了全曲轴坐标系量化图形用于表现各类统计数据的能力.以<2005年中国统计年鉴>为数据源,绘制多种全曲轴坐标系图形图谱并进行分析,对实际的地学统计数据进行直观展现.同时,进行曲轴坐标系量化图形专题制图系统的研发,为全曲轴坐标系在地学信息可视化中的应用提供参考. 相似文献
3.
论述斜角坐标系量化图形的立体化问题：（１）斜角坐标网的立体化,包括构成各种几何形体以及立体化产生的不同效应等;（２）内容图形的立体化,重点是单、双坐标系基础图形,包括各种不同柱状形体的构成等;（３）量化图形整体的立体化,包括多坐标系中心组合、三面体组合、反转组合等组合图形,侧重研究坐标网与内容图形的配合等。 相似文献
4.
斜角坐标系量化图形的立体化研究 总被引：1，自引：0，他引：1
论述斜角坐标系量化图形的立体化问题：（１）斜角坐标网的立体化,包括构成各种几何形状以及立体化产生的不同效应等;（２）内容图形的立体化,重点是单、双坐标系基础图形,包括各种不同柱状形状的构成等;（３）量化图形整体的立体化,包括多坐标系中心组合、三面体组合、反转组合等组合图形,侧重研究坐标网与内容图形的配合等。 相似文献
5.
李庆辰 《地理与地理信息科学》2001,17(1):96
由谷宝庆、胡文亮、韩宪生、张军海合著的《斜角坐标系量化图形学》一书 ,已由科学出版社2 0 0 0年 9月出版。该书推出一种以图形高效传递量化信息的方式 ,即新型的复式量化图形。这种量化图形既可以为完善社会、经济地图的图形显示提供基础条件 ,又可以单独用来传递地理量化信息。它将为地理学发展作出新贡献。全书有以下特点 :其一 ,该书从数学基础开始 ,建立起完整的斜角坐标系统 ,介绍斜角坐标系的构成原理 ,分类系统、变形规律、计算公式、曲轴形式等 ,提出斜角坐标系交角大小的随机性和选取范围 ,轴向在全方位内任选的自由度、原点的… 相似文献
6.
该文阐述了零角坐标系的构成原理和实际运用，分析了零角坐标系图形发现的影响因素，从而为专题量化信息图形可视化提供了一种新的图形展现形式。 相似文献
7.
该文阐述了零角坐标系的构成原理和实际运用 ,分析了零角坐标系图形展现的影响因素 ,从而为专题量化信息图形可视化提供了一种新的图形展现形式。 相似文献
8.
该文阐述了透视坐标系的概念 ,列举了多种透视坐标网中量化信息的图解实例 ,力求进一步丰富和提高专题地图图形可视化的表现能力。 相似文献
9.
该文阐述了透视坐标系的概念，列举了多种透视坐标网中量化信息的图解实例，力求进一步丰富和提高专题地图图形可视化的表现能力。 相似文献
10.
新疆土地详查历经八年，至今未完。为降低劳动强度，提高工作效率，针对叶城县山区土地利用类型多样，耕地分散等特点，进行了微机制图的探讨。本文着重介绍了（1）微机制图的软硬件工作环境；（2）图形编辑和编码技巧；（3）图形量化方法，建立图形库；（4）属性数据输入、更新、修改；（5）错误信息检查，建立点线面的相互关系；（6）面积计算与机助制图。 相似文献
11.
Boris Petelin Igor Kononenko Vlado Malačič Matjaž Kukar 《International journal of geographical information science》2019,33(10):1936-1959
We present an adaptation and application of frequent subgraph mining (FSM) in a time series of spatial multi-level directed graphs depicting probabilistic transitions of water masses between neighboring sea areas within a given time interval. The directed graphs are created from the results of the numerical model, the Mediterranean Ocean Forecasting System. We assign unique labels (geographical locations) to vertices of the multi-level directed graphs. Then, we add the edge labels as discretized values of the probabilities of transitions between vertices. This modification allows the use of the established algorithm gSpan to search for frequently directed subgraphs in the sequence of such directed graphs. Thus, we obtain both general and specific subgraphs, such as convergences, divergences, and paths of the ocean currents in the numerical model. The resulting substructures, revealed by directed subgraphs, match oceanographic structures (gyres, convergences/divergences, and paths) deduced from field observations, and can also serve as a tool for the validation of the numerical model of circulation in the sea. 相似文献
12.
R. Sierra C. R. Stephens 《International journal of geographical information science》2013,27(3):441-468
Visual data mining of spatial data is a challenging task. As exploratory analysis is fundamental, it is beneficial to explore the data using different potential visualisations. In this article, we propose and analyse network graphs as a useful visualisation tool to mine spatial data. Due to their ability to represent complex systems of relationships in a visually insightful and intuitive way, network graphs offer a rich structure that has been recognised in many fields as a powerful visual representation. However, they have not been sufficiently exploited in spatial data mining, where they have principally been used on data that come with an explicit pre-specified network graph structure. This research presents a methodology with which to infer relationship network graphs for large collections of boolean spatial features. The methodology consists of four principal stages: (1) define a co-location model, (2) select the type of co-association of interest, (3) compute statistical diagnostics for these co-associations and (4) construct and visualise a network graph of the statistic from step (3). We illustrate the potential usefulness of the methodology using an example taken from an ecological setting. Specifically, we use network graphs to understand and analyse the potential interactions between potential vector and reservoir species that enable the propagation of leishmaniasis, a disease transmitted by the bite of sandflies. 相似文献
13.
14.
《The Journal of geography》2012,111(6):283-285
Abstract Remote Sensing for Resource Management by C.J. Johannsen and J.L. Sanders, eds. Ankeny, Iowa: Soil Conservation Society of America, 1982. xx and 665 pp., figs., graphs, tables, photos, apps., refs., glossary, and index. $45.00 cloth. Where the Grass Is Greener: Living in an Unequal World 2d ed. by David M. Smith Baltimore: Johns Hopkins University Press, 1982.386 pp., figs., graphs, tables, maps, app., biblio., and index. $7.50 paper. Common Landscape of America, 1580 to 1845 by John R. Stilgoe New Haven, Connecticut: Yale University Press, 1982. xi and 429 pp., illus., photos, refs., biblio., and index. $29.95 cloth. The Design of Suburbia: A Critical Study in Environmental History by Arthur M. Edwards London: Pembridge Press, 1981. viii and 281 pp., figs., il-lus., photos, refs., biblio., and index. $32.50 cloth. The Soviet Union: A Systematic Geography by Leslie Symons, ed. Totowa, New Jersey: Barnes &; Noble, 1983.266 pp., figs., graphs, tables, photos, maps, and index. $28.75 cloth; $18.75 paper. Living Under Apartheid: Aspects of Urbanization and Social Change in South Africa by David M. Smith, ed. Winchester, Massachusetts: Allen &; Unwin, 1982. The London Research Series in Geography 2. xiii and 256 pp., figs., graphs, tables, maps, biblio., and index. $35.00 cloth. 相似文献
15.
16.
17.
Benjamin Adams Krzysztof Janowicz 《International journal of geographical information science》2013,27(4):556-579
There has been significant progress transforming semi-structured data about places into knowledge graphs that can be used in a wide variety of geographic information systems such as digital gazetteers or geographic information retrieval systems. For instance, in addition to information about events, actors, and objects, DBpedia contains data about hundreds of thousands of places from Wikipedia and publishes it as Linked Data. Repositories that store data about places are among the most interlinked hubs on the Linked Data cloud. However, most content about places resides in unstructured natural language text, and therefore it is not captured in these knowledge graphs. Instead, place representations are limited to facts such as their population counts, geographic locations, and relations to other entities, for example, headquarters of companies or historical figures. In this paper, we present a novel method to enrich the information stored about places in knowledge graphs using thematic signatures that are derived from unstructured text through the process of topic modeling. As proof of concept, we demonstrate that this enables the automatic categorization of articles into place types defined in the DBpedia ontology (e.g., mountain) and also provides a mechanism to infer relationships between place types that are not captured in existing ontologies. This method can also be used to uncover miscategorized places, which is a common problem arising from the automatic lifting of unstructured and semi-structured data. 相似文献
18.
19.
《The Journal of geography》2012,111(4):183-191
Abstract Prairie mosaic: An ethnic atlas of rural North Dakota: by William C. Sherman, Fargo: North Dakota Institute for Regional Studies, 1983. v and 152 pp., figs., illus., photos, maps, and indexes. $12.85 cloth. Nigeria in Maps: by K. Michael Barbour, Julius S. Oguntoyinbo, J. O. C. Onyemelukwe, and James C. Nwafor, eds. New York: Africana Publishing, 1982. vii and 148 pp., figs., illus., graphs, tables, maps, apps., biblio., and glossary. $29.50 paper. Frontier on the Rio Grande: A Political Geography of Development and Social Deprivation: by John W. House, New York: Oxford University Press, 1982. xii and 281 pp., figs., tables, photos, maps, app., refs., and index. $29.95 cloth. Progress in Rural Geography: by Michael Pacione, ed., Totowa, NJ: Barnes &; Noble, 1983. 253 pp., figs., graphs, tables, maps, and index. $26.95 cloth. The Cultural Landscape: An Introduction to Human Geography: by James M. Rubenstein and Robert S. Bacon, St. Paul, MN: West Publishing, 1983. xxx and 501 pp., figs., illus., graphs, tables, photos, maps, and index. $26.95 cloth. Applied Geography: Practice, Problems and Prospects: by Morgan Sant, New York: Longman, 1982. x and 152 pp., figs., tables, maps, refs., and index. $30.00 cloth, $11.95 paper. 相似文献