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在研究公路交通地理信息系统(GIS—T)建设现状的基础上,提出了基于GIS组件SuperMap Objects的公路工程地理信息平台。从公路工程规划、设计、建设和管理过程中所涉及的各种数据和资料及现实需求出发,探讨了平台系统总体结构、数据库设计和系统功能设计,研究了系统开发中数据的组织与动态分段等关键技术。以广东省公路工程地理信息平台为实例,介绍了系统的功能和应用,实践了文中提出的技术和方法。 相似文献
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《制图学和地理信息科学》2013,40(3):123-144
Geographic information system (GIS) applications for risk evaluation concerning environmental and ecological health are appearing with greater frequency. In this paper, we devise a conceptual framework for risk evaluation that encompasses and synthesizes several component frameworks (including risk scoping, risk communication, risk assessment (risk analysis), risk management, and risk monitoring) concerning environmental health, and hence human and ecological impacts. The purpose of devising the framework was to understand better where, when, and how GIS might be used for risk evaluation, and to identify gaps in knowledge requiring further research. An examination of 40 publications shows that most of the research done on the use of GIS for risk evaluation concerned applications in risk assessment rather than risk scoping, management, and risk monitoring. A four-level risk assessment framework is proposed, and criteria for evaluating the work are used to clarify what has been accomplished overall and where research opportunities exist. Future directions for the application of GIS in risk evaluation are suggested. 相似文献
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电子地图的制作是GIS系统建立的基础,具有非常重要的意义。要把GIS应用于公路信息化的建设必须对公路电子地图进行规范化的处理。本文详细介绍了公路地图处理的各个步骤:地图投影的定义、公路方向的纠正和合并、地图桩号的赋值和地图拓扑关系的生成。 相似文献
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On the design of formal theories of geographic space 总被引:1,自引:0,他引:1
This paper discusses the design of formal theories of geographic space for the application in Geographic Information Systems.
GIS software is an implementation of formal theories of geographic space. The notions of formal theories are introduced and
discussed in the context of examples from the GIS field.
Our approach is an application of the general framework of formal theories to the special class of theories of geographic
space, in particular to the geometry of geographic space. A framework is introduced for characterizing and evaluating formal
theories of geographic space and the process of their design. This is used to provide (1) a classification of formal theories
of geographic space, (2) criteria of their adequacy, and (3) an evaluation of design decisions in the process of formalization.
The paper demonstrates the choices in the design of GIS and the dependencies between these choices. Considering the design
space for theories underlying a GIS, we can see that current GIS are based on one choice: analytical geometry. Other designs
are possible and a systematic exploration of alternative types of GIS, for example, based on constraints or based on stored
spatial relations, becomes necessary.
Received: 30 April 1997/Accepted: 8 March 1999 相似文献
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全面、现势的土地利用基础图件是一个国家摸清其土地资源家底,进行土地资源合理利用、规划和科学管理的基础和前提条件。本文从数据源、处理手段与采用的技术方法对土地利用基础图件更新的技术体系进行了研究,基于图件更新技术流程的三个主要环节对图件更新方法进行了系统分析和分类总结,继而提出了一套集RS/GIS/GPS技术于一体的图件更新技术方法与流程;同时依托具有自主知识产权的遥感数据处理平台CASM Im-ageInfo,将整个作业流程一体化,构建了适合我国具体国情的实用和可操作性强的土地利用基础图件更新软件系统,实现了土地利用基础图件的快速更新。 相似文献
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The bus route map is a diagram that aims to convey necessary information for map readers to find an appropriate way of moving from an origin to a destination. Design of bus route map is a complicated and time-consuming task that requires careful consideration of readability and aesthetics. This paper proposes a new computational method for designing bus route maps. The method helps us to reduce six types of undesirable elements in bus route maps, i.e., gap, shift, crossing, overlap, misalignment, and acute bend. The method consists of two phases: line layout phase determines the relative order of bus routes on each road segment and map layout phase calculates the actual position of bus routes drawn on a map. This paper applies the method to the design of bus route maps of Chiba City, Japan. The result supports the effectiveness of the method as well as reveals open topics for future research. 相似文献
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目前,很多单位和高校都在进行区域三维地图的建设,数字化的三维地图不仅可应用于建设和施工规划,也可应用于生活实践、地理信息分析等方面。本文以某大学新建校区为例,基于Google Earth的GIS平台搭建由全站仪施测、以AutoCAD和SketchUp制作的三维校园BIM模型,再利用MFC和COM API技术进行程序封装和基于C/S的软件开发,制作出一个可移植的区域三维地图导览系统。该系统不仅可以实现基本地物的三维展示和自由漫游,也可以实现查询、路径导航等一系列GIS分析功能。 相似文献
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在研究公路交通地理信息系统(GIS-T)建设现状的基础上,提出了基于GIS组件SuperMap Objects的公路工程地理信息平台。从公路工程规划、设计、建设和管理过程中所涉及的各种数据和资料及现实需求出发,探讨了平台系统总体结构、数据库设计和系统功能设计,研究了系统开发中数据的组织与动态分段等关键技术。以广东省公路工程地理信息平台为实例,介绍了系统的功能和应用,实践了文中提出的技术和方法。 相似文献
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基于GIS技术建立公路测量信息管理系统,能够解决以往在测量成果管理上因缺少地形图背景而出现的数据不直观、查询点位难等问题,大大提高测量成果的使用效率。围绕公路测量信息管理系统的建立,在总体构想、数据组织、功能模块等方面进行了探讨;并以Visual Basic 6.0与MapX5.0控件为例,给出了系统实现的关键技术方法。 相似文献
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介绍了将嵌入式可扩展的GIS组件开发用于公路地理信息系统的管理.对系统的平台框架、组成系统的功能模块及系统数据库平台建设的方案做了详细阐述. 相似文献
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Wayne L. Myers 《国际地球制图》2013,28(2):49-54
Geographic Information Systems (GIS) technology has had its genesis in the sophisticated computational context of research laboratories and commerical computing. Proprietary packages and a plethora of peripherals present problems in propagating GIS technology, both in developing countries and in conventional classroom settings. GISTARS (Geographic Information STARter System) is a training package developed under the auspices of the Office for Remote Sensing of Earth Resources at Penn State University by the author with support from USAID/India to promte interest in and understanding of GIS technology. It runs on generic PC‐compatible microcomputers having one or more diskette drives and a CGA card. A simple analog overlay device has been developed for converting source maps to digital form, so that training can be conducted without an electric digitizer. Documentation/tutorials are self‐contained. The software in executable form is non‐proprietary and may be freely copied and redistributed. It has served as the basis for a series of introductory GIS workshops given by the author in India. 相似文献
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郭鑫 《测绘与空间地理信息》2014,(7):89-91
以移动GIS平台架构为研究对象,采用面向服务思想设计并实现了一种基于"云+端"模式的移动GIS快速开发平台,提出一种分层开发模型OS-GAL-IAL,研制出跨平台、高性能、全自主的GIS内核,实现了一套精细化、流程化、可视化、易扩展的快速开发框架,能帮助开发者快速构建快速、高效的移动GIS应用系统。 相似文献
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公路景观地理信息管理系统研究 总被引:2,自引:0,他引:2
以桂阳路航空遥感图像、地面调查资料为基础,利用可视化编程语言Delphi7.0及地理信息系统控件MapX,依据管理系统设计的一般原则,进行了公路景观地理信息管理系统的设计与开发。该系统实现了公路景观各子系统之间,系统数据库、属性库、指标库、图形库和模型库之间的数据共享,并且具有组合统计分析、多功能查询、过程可视化、可扩充性强等特点,为进行公路景观评价、预测、规划及优化决策提供了数据源和技术方法。 相似文献