共查询到20条相似文献，搜索用时 812 毫秒
1.
Christine M. Erlien 《Transactions in GIS》2011,15(Z1):171-181
While writing is touted as a way to learn, little has been written about the use of writing in courses focused on the geospatial technologies: geographic information systems (GIS), remote sensing, and the Global Positioning System (GPS). This study, therefore, aimed to assess student knowledge gained through two types of coursework, writing‐intensive and methods‐oriented. The study used a pre‐/post‐test strategy to measure gains in student knowledge. Results illustrate that student learning took place in both types of courses. The results, while encouraging, point to the need for more refined study of the use of writing in courses on geospatial technologies. 相似文献
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云计算是目前信息产业最热门的技术之一,GIS厂商纷纷将GIS软件迁移至云计算环境。与国外云计算部署不同,国内更青睐私有云技术,企业、政府机构纷纷搭建私有云GIS平台。针对风电场设计的特点,本文基于目前云计算应用和研究,构建了私有云GIS平台的体系框架,并对平台所涉及的主要关键技术进行了深入探索,对私有云GIS模式下的资源进行了详细的分类,包括核心服务、服务管理、用户访问接口3个部分。其中,核心服务将硬件基础设施、软件运行环境、应用程序抽象成服务,可满足多样化的风电场设计应用需要。 相似文献
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Sea ice data has significant scientific value for climate, environmental impact and engineering studies leading to the construction of facilities in Arctic waters, as well as to support tourism and fishing planning. Large collections of such data are acquired, compiled, produced and maintained by national and international agencies such as the Canadian Ice Service (CIS). Some of these data collections have been made available online. However, current Internet‐based sea ice data dissemination practices do not foster easy access to and use of the data, especially given the amount of the archived sea ice data and the nature of their spatial changes and high temporal variations. This article reports a research effort in developing a web‐based geographical information system (GIS) that facilitates the access and use of the historical sea ice data. The system provides online access, exploration, visualization, and analysis of the archived data, mostly in the form of ice charts, within a web‐based GIS. The results from a prototype development indicate that web GIS, developed using Rich Internet Application (RIA) technologies, provides added values in serving sea ice data and suggests that such a system can better accommodate more advanced sea ice data access and analysis tools. 相似文献
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基于MapGIS的县级土地利用数据库的建设 总被引：3，自引：0，他引：3
针对土地利用数据管理需要,本文着重利用国产GIS软件MapGIS进行土地利用数据库的构建,对土地利用数据采集和处理等关键技术进行了探讨,并形成了相关的应用技术,大大提高了土地利用数据采集、处理和管理的效率和技术应用层次。 相似文献
5.
《制图学和地理信息科学》2013,40(1):43-52
The recognition that local participation is a critical goal of development has contributed to the popularity in a set of techniques designed to increase local participation and knowledge in planning processes. Identified as participatory rural appraisal (PRA), this trend is marked by the use of a variety of high-end technologies, including geographic information systems (GIS). An interesting and related trend has come from members of the GIS community who argue that a "participatory GIS" is required to ensure local knowledge and participation in a variety of planning initiatives. This synergy of interests has resulted in a growth of research in the developing world that attempts to merge PRA methods with GIS tools. This paper examines the separate, but increasingly complementary, traditions of PRA and GIS. Ten case studies that combine participatory methods with GIS in Latin America, Africa, and Asia are evaluated to consider how these traditions are being applied by communities to protect ownership of territory, present local knowledge of natural resources, and to engage in long-term planning. This paper suggests that although GIS has the potential to increase participation in planning processes, a commonality of the majority of case studies is limited attention to the participatory process itself. It would address how access to information and GIS tools varies within communities, as well as the effectiveness of a participatory GIS in shaping policy outcomes. Although participation can be advanced through the use of GIS, this paper concludes by suggesting that research on the availability of these tools should not serve as a substitute for critical analyses of their use and effectiveness by local communities. 相似文献
6.
3S技术在红寺堡开发区土地详查中的应用 总被引：1，自引：0，他引：1
张永红 《测绘与空间地理信息》2007,30(4):48-49,54
为了掌握红寺堡开发区土地利用现状,合理利用土地,为促进可持续发展提供决策依据,我们利用RS,GPS和GIS等技术对红寺堡开发区土地利用现状进行了调查。本文简要介绍了3S技术应用于红寺堡开发区土地详查的具体方法。 相似文献
7.
Andrew S. Foy Laurence W. Carstensen Stephen P. Prisley James B. Campbell Randel L. Dymond 《Transactions in GIS》2015,19(4):604-618
Advances in computer technologies have improved the quality of maps, making map comparison and analysis easier, but uncertainty and error still exist in GIS when overlaying geographic data with multiple or unknown confidence levels. The goals of this research are to review current geospatial uncertainty literature, present the Error‐Band Geometry Model (EBGM) for classifying the size and shape of spatial confidence intervals for vector GIS data, and to analyze the interpretability of the model by looking at how people use metadata to classify the uncertainty of geographic objects. The results from this research are positive and provide important insight into how people interpret maps and geographic data. They suggest that uncertainty is more easily interpreted for well defined point data and GPS data. When data is poorly defined, people are unable to determine an approach to model uncertainty and generate error‐bands. There is potential for using the EBGM to aid in the development of a GIS tool that can help individuals parameterize and model spatial confidence intervals, but more research is needed to refine the process by which people use the decision tree. A series of guiding questions or an “uncertainty wizard” tool that helps one select an uncertainty modeling approach might improve the way people apply this model to real‐world applications. 相似文献
8.
Susan Henrico Serena Coetzee Antony Cooper Victoria Rautenbach 《Transactions in GIS》2021,25(1):468-490
Geospatial information and technologies are widely used in South Africa, initially mostly with proprietary software but today, mature, open source alternatives such as QGIS are available. We wanted to find out if and why South African users accepted QGIS, globally the most widely used free and open source GIS. We adapted the extended unified theory of acceptance and use of technology model to test several hypotheses regarding the acceptance and use of QGIS in South Africa. 205 registered members of the Geo‐Information Society of South Africa completed a structured questionnaire. Results show that habit has the most significant influence on behavioural intention to use QGIS, followed by facilitating conditions, price value and social influence. Performance expectancy, effort expectancy, hedonic motivation and access to source code played no significant role. The findings show that adoption of QGIS in South Africa is not primarily influenced by benefits attributed to open source software, such as cost benefits, customizability, improved reliability, quality and security. The results are useful for developers of any GIS product and for choosing a GIS product for an organization, because they provide insight into the behavioural intentions of users. 相似文献
9.
《制图学和地理信息科学》2013,40(1):84-89
There has so far been little discussion of the ethics of geographic information systems (GIS), yet they are complex and driven by conflicting goals. This paper argues for an ethical analysis of GIS which goes beyond “intemalist” judgements of good behavior and adherence to accuracy standards to a contextualized “extemalist” one. Only when spatial technologies such as GIS are understood as part of a nexus of relations which includes academia in the commodification of information can GIS practice by fully analyzed. A four-stage sequence of ethical practice is proposed, in which GIS has achieved the second stage. GIS practice and use is a fluctuating, contested area, which, therefore, is not suited to a rigid code of ethics. A better approach is based in the internalist and externalist dialectic. 相似文献
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《制图学和地理信息科学》2013,40(1):90-97
It has been often argued that no technology is value-neutral. One extension of the argument suggests that the power of geographic information system (GIS) technologies should be used for beneficial purposes. GIS should be used to enhance the quality of life, promote equity in access to knowledge for all members of society, reduce socio-economic gaps between members of the social system (or at least should not widen them), and for other “good purposes.” The limitations of such reasoning and goals become evident when one attempts to apply such principles in everyday practice. Numerous gray areas exist in the use of GIS. Determining what constitutes a beneficial versus a detrimental consequence is a value-laden judgment. In many instances, what constitutes “fair, just, and equitable” conduct and results is not obvious. Often, it will depend on the perspectives of those affected by use of the information system. This paper distinguishes illegal from unethical conduct and presents a method for gauging whether, and to what extent, conduct in the use of GIS will be considered unethical by those affected by its use. 相似文献
12.
Introductory courses in Geographic Information Science (GIS) expose students to the concepts and practices necessary for future academic and professional use of GIS tools. Traditional GIS courses balance lectures in the theories of GIS with pre‐built and pre‐packaged lab activities to learn the practices of GIS. This article presents a case study of an experimental introductory course in which students conducted novel, independent project‐based group research under the supervision of graduate or advanced undergraduate students enrolled in the course, culminating in a class presentation and publication quality paper. Surveys and interviews indicated that students reacted more positively to project‐based group research than to traditional activities. Students felt the projects better prepared them for ‘real world’ applications of GIS, and recommend project‐based group research in other GIS coursework. Additionally, our findings indicate that students appreciate interactions with peers of varying skill levels and experiences, as these broaden their capabilities to work with other GIS users. 相似文献
13.
This paper gives some guidelines of land use planning firstly. A framework of agriculture land use planning is designed based on land use suitability evaluation using integrated technologies of RS and GIS. Further work expected is also given. 相似文献
14.
YANQin ZHANGJixian 《地球空间信息科学学报》2002,5(2):51-55
This paper gives some guidelines of land use planning firstly.A framework of agriculture land use planning is designed based on land use suitability evaluation using integrated technologies of RS and GIS.Further work expected is also given. 相似文献
15.
Abstract This study advocates the use of GIS and remote sensing technologies to establish urban evolution maps and assess the impact of urbanization on agricultural areas over the last three decades. The target area is the city of Béni‐Mellal, located in central Morocco. The methodology adopted makes use of panchromatic SPOT images to survey the urban areas during the 1980s and 1990s. Available topographic maps provided the information for the 1970s. Maps and statistics of land use and urban growth for Béni Mellal were established after manually classifying images on a per-polygon basis and digitizing topographic maps using GIS capabilities. The results show an increase in dense urban area by 980.7 ha from the 1970s to the 1990s. This increase occurred at the expense of forests (24.7 ha), plantations (752.3 ha), rangeland (113.4 ha), non‐irrigated land (69.7 ha), and irrigated land (20.6 ha). During this period, scattered urban areas, predominantly suburbs, increased by 755.9 ha to the detriment of forests (14.9 ha), plantations (109.8 ha), rangeland (138.9 ha), non‐irrigated land(400.5 ha), and irrigated land (91.9 ha). These cartographic and statistic results are efficient decision‐making tools for protecting agricultural land and planning urban and suburban areas. 相似文献
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随着网络通信、三维建模和地理信息等各项技术的进步,基于Web的三维GIS应用需求越来越广泛。本文融合了Html5、JavaScript、WebGL、MongoDB和倾斜摄影建模等技术,利用这些技术的优势,实现了基于Web的三维GIS应用,为Web三维GIS应用提供了新的实现方式,使得三维数据更具有时效性,三维数据实现跨平台浏览,用户体验更好。 相似文献
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基于地学信息服务的Internet 3维 GIS：GeoEye 3D 总被引：9，自引：0，他引：9
随着Internet、分布式计算以及计算机图形学的飞速发展,开发基于Internet的3维GIS系统已成为可能。这3种技术的有力结合为地学领域开创了一个崭新的时代,促使网络GIS的概念由“地学数据服务”提高到“地学信息处理服务”的新阶段,不仅地学数据,地学信息处理功能也可以分布在基于客户／服务器的架构上,用户可以根据不同的需求“租用”和组合来自于Internet的不同功能。基于这一概念和作者提出的构件注册模型,我们从1998年开始着手研究和开发新一代的Internet 3维GIS：GeoEye 3D。这一系统集成了GIS、3维可视化、分布式计算及网络通信等技术,允许用户通过标准Internet浏览器来应用远程功能对远程和本地数据进行可视化分析。阐述了地学信息处理服务概念和构件注册模型以及GeoEye 3D的系统架构、算法和应用实例。 相似文献
20.
Within an increasingly competitive job market, academic internships have become an important source of work experience for students with career interests involving geographic information systems (GIS) and related geospatial technologies. However, while GIS internships offer benefits to employers and students, their structure and objectives may be viewed differently across stakeholder groups such as private industry, government, and academia. In this article we evaluate how GIS internships are valued and perceived by employers, educators, and the interns themselves using quantitative and qualitative measures collected though web‐based surveys and semi‐structured telephone interviews. Data analysis helped us determine the relative importance of technical and non‐technical skills needed by students in preparation for GIS internships. Our findings reveal relatively few differences in scores assigned to technical and non‐technical skills when comparing employer and educator ratings. Educator ratings were higher for nearly all technical and non‐technical skills. In comparison, employers placed greater emphasis on technical skills involving data entry/manipulation and non‐technical skills such as flexibility/adaptability. The survey also revealed differences in employer and educator perceptions of internship goals and administration. Telephone surveys with former interns supplemented information from employer and educator surveys in developing “best practices” that may be useful in the design and administration of GIS internships. 相似文献