共查询到20条相似文献，搜索用时 15 毫秒
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黄勇 《现代图书情报技术》2012,(5):91-95
为满足用户对留学人物地域信息进行查询、展示与分析的需求,提出基于Google Maps API实现GIS应用的解决方案和技术思路。利用Google Maps APIJ、avaScript、PHP、MySQL及相关技术将留学人物数据库与Google地图进行整合,构建留学名人足迹、留学人物分布等GIS应用,以增强数据库可用性并提升用户体验。 相似文献
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Grace Romund 《The Journal of Academic Librarianship》2019,45(3):318-320
Geographic information sources have evolved at the same rate as the many other information sources in the last half a century. This article discusses geographic literacy and spatial thinking, and the questions that derive from geographic inquiry. Librarians in academic libraries are most often called on to meet the complex specialized geographic information needs that arise from study and practice in those areas. The sources we use and the ways we respond to these needs have evolved and expanded with the advent of various digital technologies. In order to be able to work with these new technologies, librarians can develop specialized competencies in geographic information systems (GIS) which allow them to go beyond print maps and atlases in the provision of geographic information. 相似文献
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Tamar Ganor 《Journal of Map & Geography Libraries》2017,13(2):175-197
A traditional library catalog does not do justice to maps and aerial photographs. Text can never fully describe them and maps' and aerial photographs' geographic coverage or perimeters cannot be displayed visually in the online public access catalog (OPAC), so searching based on their textual metadata without specific spatial reference data used also for display purposes is often not enough to locate relevant items. The Hebrew University of Jerusalem's (HUJI) Geography Department has developed a spatial search engine for their scanned aerial photographs collection that allows users to locate one or more aerial photographs according to the area of the Earth's surface that was photographed and their accompanying metadata. The Humanities and Social Sciences Library, which holds a large unscanned print map collection, has asked to integrate a similar map search mechanism in the Department's existing search engine, and a new website was launched in December 2015 (http://ccg.huji.ac.il/aerialphotos/) showing the aerial photographs' center points alongside the maps' rectangle perimeter. The search engine retrieves maps and aerial photographs that intersect with a user-drawn rectangle. This article discusses the characteristics of these collections, the rationale behind searching for maps and aerial photographs together, and the process of defining and building this spatial search engine. This method allows users to view which items are available in their area of interest side-by-side, on a Google Maps background map. 相似文献
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《Cataloging & classification quarterly》2013,51(4):107-119
Telephone directories often cover many geographic entities. Small geographic entities commonly are included in directories of larger entities, thereby limiting access to the location of the smaller unit. Finding telephone directories for some geographic areas can be very difficult at times. Cataloging all telephone directories in a library's collection is one way to help the patron and reference librarian. This article discusses how to catalog telephone directories in order to provide maximum access to this information. 相似文献
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《The Reference Librarian》2013,54(41-42):55-63
This article will describe Geoscience resources available on the Internet, primarily the Weather Underground, the Geographic Name Sewer at the University of Michigan, and the Weather Machine at the University of Illinois. Instructions for connecting to these three sites will be given, as well as information on two gopher sites that have these systems on their menus. The Weather Underground and the Weather Machine provide real time analysis of North American weather, climate and active geographic phenomena. In addition to current weather analysis the Weather Underground provides current information on active hurricanes, earthquakes, and in the winter, "Current Ski Conditions." A special section covers nearshore and off-shore marine forecasts, warnings, and notices to mariners (such as missing or lost vessels).1 Weather forecasts are available for most U.S. cities as well as immediale postings of weather warnings and watches. Storm damage reports are also listed, in most cases soan after the event happens. Reports come from the U.S. Weather Bureau cenhal ofices (e.g., National Hurricane Center, National Severe Storms Center), local weather offices (e.g., Chicago Weather Bureau), and a nationwide network of individual spotters and law enforcement officials. Reference librarians can use this server to provide clients with real time information on current conditions both locally and continent wide. Ihe Weather Machine also provides additional geoscience information sources to consult as well as many of the services offered by the Weather Underground. The Geographic Name Server ides a listing of cities and geographic features in the United States. Searches can be done by Zip Code, and Place Name. The server will respond with the city location, time zone, latitude and longitude, Zip Code, Area Code, etc. 相似文献
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《Journal of Map & Geography Libraries》2013,9(1):37-66
Abstract Users of geographic data may not be able to afford to purchase and implement a dataset that does not finally meet their needs. Therefore, metadata has a very important role in the information supply environment of geographic data. The development of national/local spatial data infrastructures recognizes the importance of metadata, as do the digital libraries providing spatial data. The new ISO 19115:2003 standard of metadata for geographic information is introduced briefly. In particular, geographic information can be made available as digital maps (or images) that are meant for visual use, or as datasets meant for computational use. Metadata for digital maps is closely related to the metadata elements for conventional maps and can be enhanced by providing a sample map with the data. The case of computational use of geographic data is more complex. There are several details that may appear crucial when determining the fitness of data for an intended use. Understanding the importance of the crucial factors in each use case requires professional skills from the users of metadata. 相似文献
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Through a nationwide survey of potential public library closures from 1999–2003 (the most recent federal dataset at the time of the study), the researchers assessed the reasons for public library closure, actions taken to alleviate possible loss of library services and resources, and the potential effects on users from the librarians' perspective. Geographic information systems (GIS) was used to analyze the demographics and socioeconomics of the geographic market areas around permanently closed library facilities and compared with national averages from the 2000 U.S. Census. The study found a variety of factors lead to closure; however, a lack of use, a sudden reduction in funding, and the opening of another library facility were the most common closure reasons. The actions taken by the community or library system to alleviate the loss of library services and resources depended on the circumstances of each closure. The geographic market areas around permanently closed facilities tended to include poorer and less educated patrons, and more renters than homeowners when compared to the national average from the 2000 U.S. Census. The study presents a methodology using GIS to describe libraries' geographic market areas and illustrates the need for further exploration into reasons for public library closures and the effects of facility site location, relocation, and permanent closure on potential users. 相似文献
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This study examines the quality of winners and finalists in major national and international data journalism awards. We completed a content analysis of data projects submitted by Canadian media to three journalism associations—the Online News Association, the Global Editors Network and the Canadian Association of Journalists—as far back as the first award in this category in 2012. Our research addresses how journalists executed what could be considered excellent data journalism. Our findings point to a lack of accepted standards regarding what is considered as excellence. The quality of the projects was limited by two key factors: the use of free online options such as Google Maps that were not easily customizable; and the number of practitioners who worked on the data projects largely within traditional journalism frameworks. The most used visual elements were dynamic maps, graphs and video. With respect to interactivity, all but one of the projects contained an interactive element. The most popular interaction techniques were inspection and filtering, considered entry-level techniques in the field of information visualization. These techniques suggest a need for collaborative interdisciplinary approaches to data journalism, and further study on the implications of tools such as Google Maps on practice. 相似文献
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[目的/意义] 实用的大规模地名本体数据库系统在自然语言处理、信息检索和情报分析领域具有重要的应用价值。本研究的目的是在减少人工干预的情况下,实现对地名简称、俗名以及随时间变化的复杂地名文本的自动识别与处理。[方法/过程] 以多种方法获取大规模名址数据为根基,简化地名元素间复杂关系,在开发名址元素切分、属性与关系分析及推理工具包的基础上,利用Neo4j图数据库工具开发实用地名本体数据库系统。[结果/结论] 基于所介绍的技术与方法而构建的系统具有良好的容错性和持续的数据更新能力,其地名分析、地名元素间关系推理达到了期望的精度,并在面向诸如新闻主题追踪、金融征信中的地名匹配等多种自然语言处理任务中取得良好效果。 相似文献
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《Journal of Government Information》1997,24(3):177-202
This article demonstrates opportunities afforded by the database file format of many U.S. Bureau of the Census CD-ROMs. It specifically illustrates what can be achieved by modifying and linking files extracted from these CD-ROMs, and then by adding these files as thematic map layers. The article concludes by suggesting ways in which the documents specialist can network these files and maps throughout the local community. 相似文献
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利用信息计量、共引分析、共现分析、信息可视化、社会网络分析等方法,借助CiteSpace信息可视化软件和Ucinet社会网络分析软件,对我国信息构建研究领域发表的学术论文进行了定量分析,绘制了文献共引、作者共现、关键词共现和期刊共现图谱,直观地展示了我国信息构建研究的热点领域、核心群体、核心期刊和代表文献。 相似文献
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地理信息在数字化工商行政信息系统中的应用 总被引：5，自引：0，他引：5
地理信息技术无论是在系统理论、研究方法还是在应用系统等方面都有着飞速的发展 ,该技术涉及众多学科 ,在社会发展、工程技术等领域有着广阔的应用前景。本文在简要概述地理信息系统的基础上 ,详细论述了地理信息在数字化工商行政信息系统中的应用目的、特点及内容 ,给出了相应的地理信息集成应用软件系统设计的总体框架及地理信息系统软件功能设计 ,并讨论了主要的相关技术。本文的分析设计也可用于其他相应的可视化电子政务等应用系统中的信息组织、信息检索、多维显示、决策支持等方面。 相似文献
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In order to plan adequately for education in health science librarianship and to be able to project future demands and needs we need to know a great deal more about existing manpower in health science libraries. This paper, the first in a series of reports on an investigation to gather this data, discusses the research methodology and the development of an inventory of the institution-program population upon which the survey is based. An analysis in terms of geographic location, type (educational, research, etc.), administrative control, and primary cognate area of these institutions is presented, and their distribution through the various Regional Medical Library areas is noted. Preliminary estimates are made, based on a questionnaire to the libraries, on the size of the library population, their relationship to reporting programs or institutions, exclusive of the hospital population which is being covered in an independent survey. A questionnaire to library personnel is underway which will establish, along with the other questionnaires, a basis for exploring the relationships which exist between institutions or programs, libraries and manpower. 相似文献
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基于主题网格的分布式知识管理系统是实施网络上多种异构信息资源和知识管理的最佳系统。主题网格中的分主服务器、语义网络API、主题图碎片远程交换协议、模式观察控制器,及其系统结构的优化与整合,是其运行的基础,系统中间件与1:N:1-通讯层、主题图专指层是影响系统运行的主要因素。 相似文献
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基于CmapTools的概念图知识模型在在线信息素养教育中的应用研究 总被引：2，自引：0，他引：2
在总结信息素养教育现状与不足的基础上,分析概念图对信息素养教育所提供的功能支持,提出以概念图知识模型作为信息素养内容的组织和展现形式并与E-learning环境进行有机融合的一种理念,引入软件工具CmapTools构建信息素养概念图知识模型实例,并将其应用于E-learning环境平台中,从而为学习者提供一个可视化的信息素养知识和技能的自主、协作学习环境。 相似文献
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Tonny J. OyanaAuthor Vitae 《Government Information Quarterly》2011,28(2):252-261
Recent literature about broadband telecommunications reveals two major areas that are not only globally gaining prominence, but are also demanding urgent attention from a research perspective. One of the key areas is related to the need to spatially evaluate the availability and deployment of broadband services, especially among urban versus rural communities. Another area of interest falls under the need for enabling broadband policies and strategies that address existing geographic disparities. These motivating factors shaped this research and provided a basis for defining three specific objectives, namely: (1) to identify locations with or without broadband access, (2) to identify underserved rural and inner-city markets, and (3) to determine whether university and community college towns can be used in the adoption and dispersion of broadband technologies in southern Illinois. Supply-side and demand-side data were collected and inputted into a Geographic Information System (GIS). Supply-side data included cable modem, digital subscriber lines (DSL), wireless, and fiber optic lines, while demand data included reported broadband requests from individuals without access (n = 439), students (n = 45,866), and higher education workforce (n = 5419). Using the GIS and statistical techniques, insightful maps of broadband infrastructure were created to illustrate areas of supply and demand so that governments and businesses can address existing gaps in consumer needs. Specifically, different levels of broadband access and use were mapped; different under-served rural and inner-city markets were identified so as to emphasize the dramatic economic impact on the business opportunities available to small business entrepreneurs. Also, different geographies of use and accessibility of broadband connectivity in the study region were synthesized to support decision-making. The resulting maps provided supply and demand marketing intelligence based on the geographic analyses of residential and enterprise sectors. These data can be used as a model to develop specific policy recommendations for a knowledge-based economy, specifically for the southern Illinois region or other rural communities in the United States. 相似文献