基于Google Maps的路径分析方法研究

路径分析是GIS中的常用功能,它根据起点和终点的位置坐标,计算出一条可行路线表示在地图上,为大众用户的出行提供路线查询方法。本文在研究地名地址匹配技术与Google路线请求服务及Google地名服务基础上,结合两者优势,提出基于Google Maps的路径分析方法,并以实验进行论证,为在基于网络地图服务的WebGIS系统上实现路径分析功能提供一种新思路。     

Recent Maps and Atlases — Map Cabinet

Abstract

There is currently a high demand for spatial data usage within web applications. From a technical viewpoint, web services and geoportals aim to fulfil user requirements; however, the current cartographic methods do not satisfy the needs of the end users. The problem is more challenging when the final map contains data from various sources that have various cartographic characteristics; therefore, the vital information might be located under the base map layer. In this paper, we propose the concept of layer priorities as foreground, middle ground or background, and we propose the two following methods to enhance the symbolisation: polygon overlay and colour saturation methods. The results from two case studies show that these methods can satisfy the requirements of the end users.     

Recent Maps and Atlases – Map Cabinet

Abstract

Manual airbrushed hill shading has often been viewed as a rather crude and ineffective way of portraying relief relying to a large extent on the ability of the cartographer to visualize the landscape whilst having the dexterity to handle a seemingly uncontrollable spraying machine. This paper discusses the benefits and disadvantages of the manual process, the impact digital technology has had on it, and briefly reviews tools and equipment used in relief map production.     

基于Google Maps的不动产可视化管理系统研究

不动产具有地理位置固定、价值量大、经营状态多变等特性。为适应不动产可视化管理需求,分析了系统功能,设计了系统三层结构,基于Google Maps和Google Maps JavaScript API,对不动产矢量图的绘制及属性数据添加、不动产可视化显示、不动产明细查询、不动产漫游等关键模块给出了实现过程。应用实践表明,该系统具有较好的可用性和易用性,也能为其他基于地理位置应用的系统设计开发提供参考。     

Modest Maps的Flash网络地图发布与应用

本文分析了Adobe Flash技术在网络地图发布前端技术上的优势和应用现状,选择开源Flash地图组件Modest Maps作为开发工具,在其上添加了一些组件模块,以"5.12地震信息显示"为示例,实现了基于Modest Maps的Falsh网络地图发布和简单的空间分析.     

基于Google Maps与PostGIS的地铁监测信息系统

地铁监测周期长、项目多、数据量大,涉及复杂的数据处理与预警分析,为及时准确地反映地铁施工安全现状,实现地铁监测的可视化、科学化、信息化管理,以保障地铁施工的顺利进行,综合利用当前多种主流技术的优势,设计并实现了基于Google Maps API和PostGIS的地铁监测信息系统。     

利用Bing Maps地图切片实现网络地图服务

通过分析Bing Maps地图切片数据的编码方式及URL结构,介绍了获取Bing Maps地图切片数据的方法。并将获取的数据生成网络地图服务(Web Map Service,WMS),以供任何能够支持WMS服务的客户端加载。实现了以较小的成本而且方便快捷地获取地图和影像数据。     

Road Maps and Advertising in Britain 1860–1940

Abstract

To the writer's knowledge nothing has been published, at the time of writing, on British maps as a selling medium in the period 1860–1940. The only exception proves the rule: D. G. Hindley's Advertising in Victorian England 1837–1901 (see Sources) mentions Chas Baker's 1887 ABC Guide to London and Large Pocket Map of London (see below), but does not place it in its context. This means that the subject can only be studied through the maps themselves, against a background of society at the time.     

Google Maps环境下的物流公司车辆实时监控

随着社会的发展,服务行业的不断健全,物流公司作为集代理国际国内航空货运出港、物流配送、航空速递、汽车运输、铁路运输、仓储、城际配送于一体,跨区域、网络化、信息化、智能化、具有供应链管理能力的综合性行业,也发展的十分迅速.物流公司承载着如此多的服务,而车辆作为物流公司的主要工具,在其中占有着重要的地位.该网站系统是基于G...     

基于Google Maps的车辆监控系统关键技术研究

介绍了基于WebGIS的车辆监控系统关键技术,讨论了基于Google Maps构建车辆监控系统的优越性,利用Google Maps和Ajax实现了车辆定位,位置查询,轨迹回放,异步数据通信等关键技术。     

Google Maps在地震勘探工作中应用方法探索

通过介绍Google Maps影像图在石油地震勘探中的应用,探讨了其在使用过程的下载、合并、转换、纠偏方法,并通过实例展示了应用效果。     

基于AJAX和Google Maps API的WebGIS开发研究

通过介绍AJAX技术的相关原理、Google Maps地图服务及其应用程序接口Google Maps API,提出了基于AJAX及Google Maps平台的WebGIS开发新技术。通过构建发布气象信息的WebGIS实例,探索在Google Maps平台上利用AJAX通过XMLHttpRequest对象异步调用XML数据实现动态加载地理信息和气象信息的关键步骤。研究结果表明,WebGIS实现的新模式,能够较好地解决传统WebGIS的固有缺点,如加快了响应速度、增强了用户体验和方便了服务扩充等。     

Geographic Reality Versus Imagination in Taiwan’s Historical Maps

Abstract

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During the past 400?years, Taiwan has experienced the dominance of various political regimes, which allowed the development of a diversity of cartographic styles for academic comparison. A detailed analysis of historical maps across centuries demonstrates that this contested island has been illustrated with a blending of reality, misconception and imagination. This paper narrates how maps reveal political rulers’ conscious and unconscious perceptions of this island. We call attention to the abundant cartographic materials in existence and suggest that they can be fascinating materials for the study of the contested colonial histories of this island in various disciplines.     

Contemporary Statistical Maps—Evidence of Spatial and Graphic Ignorance

Statistical maps are now produced in greater numbers and by persons in a wider range of disciplines than ever before. It is unfortunate that this increased production has not been accompanied by an improvement in map quality. All too frequently, contemporary mapmakers evidence a lack of understanding of the primary function of statistical maps, the symbolic language of mapping, and the effect that data manipulation plays in map communication. Coupled with these deficiencies there is a general lack of appreciation of the basic elements of graphic design. Furthermore, the expanded use of the computer in mapmaking seems to be related to and may even foster low quality since programmers are generally untutored in cartographic design and communication.     

基于Google Maps的气象全球眼视频监控系统

基于Google Maps设计和开发了气象全球眼视频监控系统,利用Google Maps API,以B/S方式灵活地实现了气象全球眼视频监控;实现了气象全球眼站点信息的叠加显示,对气象全球眼站点按高山、公路、沿海、航道、城市等分类进行浏览,气象全球眼视频的显示和查询等功能;为气象预报预警等提供了实时的资讯,也为浙江天气网、浙江气象影视及气象专题提供了丰富的视频信息和图像信息,大大增强了防灾减灾等气象服务能力。     

Multi‐sensor Image Maps from SPOT,ERS and JERS

Abstract

Image mapping using data from visible and infrared sensors has, as a major drawback, the frequent cloud cover experienced in many countries. This is one of the main reasons why topographic maps at 1:100,000 scale and larger are often outdated. The results of a study which investigated the possibilities of fusing up‐to‐date spaceborne microwave data with existing images from optical sensors for topographic map updating at a scale of 1:100, 000 are presented in this paper. A key issue researched was the influence of geometric distortions and corrections of remote sensing data on the results of pixel based digital image fusion. After having terrain‐geocoded and radiometrically enhanced imagery from the Landsat, SPOT, ERS‐1 and JERS‐1 satellites, the data were fused applying a variety of colour transformation techniques as well as statistical or arithmetic methods. Initially, the image fusion was implemented using images covering a test site in the north of The Netherlands in order to calibrate specified combinations and techniques in a rather flat area. With the experience gained, the remote sensing data acquired over the research site were processed. The research test site is located in a typical Developing Country in the humid Tropics, on the mountainous south‐west coast of Sumatra in Indonesia. The results of the various applied techniques and image combinations were evaluated with reference to their capability to overcome the cloud cover problem. New combinations of techniques and images were developed as result of an optimisation process. The research produced two prototypes of annotated 1:100,000 scale image maps containing fused, cloud‐free optical/microwave imagery.     

Google Maps API技术在移动终端上的GIS应用

综合应用Google Maps API、Android、数据库、服务器技术等集成方法,开发了Android端应用程序,实现了实时数据(包括GPS坐标等数据)的校园GIS的应用。