北京市旅游流时空特征研究

大数据背景下,网络上产生了大量带有游客时空信息的"数字足迹".本文以北京市为例,利用游记数据探究北京市旅游流的时空及网络结构特征.结果表明:(1)2月、7至9月为北京市的客流高峰期;(2)北京市旅游流的空间分布具有明显的等级分异特征且密度分布不均衡,总体呈"小聚集、大分散"的特征;(3)北京市旅游流网络中,平均每个节点...     

国土坡度图成果质量评定及现存问题探讨

坡度图成果作为第三次全国土地调查的重要组成部分,直接影响国家对土地利用规划、土地管理等多方面应用。在满足国家级质检复核的基础上,本文探索了省级质量检查验收的标准,并对生产过程中产生的问题提出解决的办法。     

一种气象卫星云图的坐标转换与配准方法研究

设计了气象卫星云图坐标转换与范围截取的算法,并基于ArcEngine组件实现了卫星云图的自动配准。实验证明,本文提出的方法可以快速有效地实现卫星云图的位置校正以及与基础地理数据的准确叠加,减少分析过程中的误差,提高气象卫星云图的使用效率,对天气监测及分析预报等工作提供了及时、有效、科学的辅助决策支持。     

矿区三维地质建模与地裂缝成因分析

为了分析在复杂地质条件下采煤引起的大规模地表裂缝的形成原因,本文以某矿区地裂缝为研究对象、数字化软件SURPAC为技术平台、岩体为主要区域变量,建立关于开采工作面、火成岩、地裂缝及断层的三维地质模型,并进行开采沉陷影响预计,通过分析裂缝成因中各相关地质条件的作用影响,得出了煤炭开采导致地下应力平衡被打破后造成地裂缝的主要因素,为预防和治理地裂缝提供了参考。     

从政府网站发展前景来看国土资源部门户网站的未来建设

政府网站已经成为各级人民政府及其部门发布政府信息、提供在线服务、与公众互动交流的重要平台和窗口。本文对中外政府网站的发展历程进行了回顾,对政府网站的发展前景进行了展望,对国土资源部门户网站的现状进行了梳理,对国土资源部门户网站的未来发展进行了规划。     

国土资源部门户网站信息资源整合体系研究

国土资源部门户网站是国土资源信息化建设的重要内容之一,历经10余年的发展建设,在服务国土资源管理决策和信息社会化需求方面发挥了较为重要的作用。本文围绕国土资源部门户网站信息资源整合建设实践,系统地阐述了网站的整合目标、原则、分类体系,着重介绍了系统架构、实现方法与建设成果。     

基于资源三号卫星影像的城市绿地信息提取方法探讨

我国高分遥感卫星的发展为城市绿地的规划、建设和改造提供有力的技术支持。研究利用资源三号卫星全色和多光谱影像,以国内某城市为例,采用基于规则的面向对象分类技术获取城市绿地。研究提出的技术方案,简单易行,具有较好的应用性。对于推动资源三号卫星在国土资源和城市规划方面的应用具有重要意义。     

MAPPING OF TECHNOGENIC ANOMALIES FOR THE PURPOSE OF A GEOCHEMICAL EVALUATION OF URBANIZED AREAS

Industry concentrated in cities is a major source of geochemical pollution. It is suggested that this technogenic impact on the environment can be measured by techniques developed in geochemistry. The specific nature of the pollutants can be identified and their levels of concentration (mostly in the soil) can be measured against normal background values. This allows areas of pollution to be classified and mapped in terms of the composition and concentration of pollutants from industrial emissions. Translated from: Voprosy geografii, Vol. 120, 1983, pp. 55-67, by Robert K. Holz and Warren Hamill, University of Texas, Austin.     

THE STUDY OF DEFORESTATION PROCESSES WITH SPACE IMAGES OF THE SOUTHWESTERN GDR

The use of intermediate-scale space imagery in the analysis of current and ancient deforestation is exemplified by a case study in the southwestern quarter of East Germany, an area heavily deforested as a result of mining and agricultural activities. More specifically a mosaic of 1:1,000,000-scale Landsat imagery was used to compile a series of maps (of modern landscapes, forests, land use), the comparison of which provided an inventory of the causes and extent of deforestation over the study area. This in turn permitted linkages between losses of forest cover and other environmental problems to be identified. Translated by Jay K. Mitchell, PlanEcon Inc., Washington, DC 20005 from: Geografiya i prirodnyye resursy, 1988, No. 1, pp. 165-173.     

THE READABILITY OF THE MAP: THEORETICAL PRINCIPLES

An effort is made at developing a theory of map readability, defined as the process of the user's representation of the information of the map in his/her own mind. This can be estimated quantitatively by surrogate measures, which include the speed of map comprehension and accuracy of map interpretation. Levels of psychological representation of map information are incorporated to determine at what stage particular aspects of map knowledge are understood. Thus what readability entails, and the approaches used to measure it (what types of things are comprehended, how fast, and how accurately) will depend upon the level of representation. Translated from: Vestnik Leningradskogo Universiteta, seriya 7 [geologiya, geografiya], 1988, No. 1, pp. 32-37.