On-the-fly server-based aerial imagery management system

Aerial images are valuable products when dealing with both geospatial and geotemporal analysis. Nowadays, they are widely used for many different purposes and by an extensive public, including private companies, official administrations and individual users. Although in the past few years there has been an increasing interest in showing all kinds of geographical information on the World Wide Web, access to aerial imagery and its dissemination are still difficult and lack flexibility. This paper introduces an aerial imagery management system based on client–server principles, operated so as to allow users quick and efficient queries, processing and management of huge sets of photogrammetric imagery stored on raster servers. It is a novel product that is ready to provide image-based cartographic data available in public and private digital warehouses, facilitating all the required visualisations and queries, as well as geometric and radiometric processing on the fly. This paper shows the design, system architecture and various functionalities of the system in a real-life scenario.     

地理信息服务的思考与探索

GIS正在从传统意义上的地理信息系统向地理信息服务发生偏转,地理信息服务已成为信息服务业中的一个重要组成部分。文中归纳总结了地理信息服务概念、技术体系、服务模式以及我国地理信息服务发展的差距、对策与建议。     

太原市城市复合生态系统调节服务时空格局演化及驱动机制研究

以太原市主城区为例,根据生态系统服务理论对太原不同土地利用类型所提供的正负生态系统调节服务价值分别进行测度计算,并综合分析城市复合生态系统调节服务的时空演化特征,最后,从直接原因(土地利用变化)和根本原因(空间城镇化、人口城镇化、产业空间组织与空间规划、政府相关政策与规划)2个方面,对太原市生态系统调节服务能力变化进行...     

Producer Services Research in Europe*

Four directions in producer services research in Europe are identified: the economic role of producer services for urban and regional development; the location of advanced producer services; the role of regional structures and innovative “milieu”; and local development and labor markets. Issues for future research include the role of producer services in the urban structuring and/or restructuring of world cities; the relation between producer services and interregional disparities; the integration of producer services into networks; and the impacts of the liberalization of producer services.     

Producer Services Research in the United Kingdom

This paper reviews recent research in the United Kingdom on producer services and suggests directions for further research. A recurrent theme in UK-based geographic research into producer services is the role of service activities, establishments, and trade in uneven development of the UK space economy, a role manifested in uneven provision and quality of services in peripheral regions. During the 1980s, overall growth in demand for producer services and the rapid rise in metropolitan London real estate costs reduced London's dominance, but these trends moderated by the end of the decade. In the absence of adequate government statistics, regular and standardized surveys are needed to compile a time series of service change in the United Kingdom. Directions for continued empirical research include the role of producer services in innovation and technology transfer, the implications of information technology for the location of employment in the sector, and the impacts of productivity increases on employment and wages.     

Sectoral Composition and Spatial Distribution of Department of Defense Services Procurement*

The purpose of this research is to analyze the composition and distribution of Department of Defense (DOD) services procurement. The results indicate producer services comprise 53% of DOD services outlays. Defense expenditures for services are particularly important in the Washington, D.C., region and in states that either produce weapons or house defense-related R&D facilities. Defense expenditures are providing impetus to service sector growth in Virginia and, simultaneously, are providing the initial stimulus for development of producer services in states such as New Mexico.     

Mapping the Globalization of the Temporary Staffing Industry*

Very little is currently known about the globalization of the temporary staffing industry, a strategically significant sector given its role in promulgating wider labor market flexibility. This article starts to rectify this research lacuna in four ways: by conceptualizing the international expansion of temporary staffing and comparing it to other business service sectors, by identifying and mapping the top twenty transnational staffing agencies, by offering a typology of the leading transnational agencies based on their functional and geographic characteristics, and by charting a research agenda for future work on this sector.     

陕蒙交界地区碎屑岩风化成因浅析

陕蒙交界地区基岩均具强风化,由此造成当地环境恶化、下游地区生态破坏和灾害积累。其形成机理应与岩石本身的物质组成、自然地理环境、地质构造状况、水文地质条件及其物理化学条件有关。而南部地区,由于上述诸因素的差别,基岩风化微弱。     

国内外开发区土地集约利用的途径及其启示

在国家宏观政策调控的背景下、开发区空间扩展与土地稀缺性矛盾目益会进一步突出。解决这一问题的出路在于提高开发区土地集约利用的程度。本文在对国内外开发区的土地集约利用手段与控制方法进行梳理的基础上，从土体利用控制的实施主体、实施程序等几个方面对国内外的情况做了比较分析，从借鉴国外开发区土地集约利用的经验和推广总结国内开发区已有的土地集约利用的经验两个角度提出了国内开发区土地进一步的集约化利用的对策建议。     

土地节约与集约利用评价研究——以湖南省为例

土地节约与集约利用是发展循环经济和建设节约型社会的必然要求。首先明确提出土地节约和集约利用评价方法与指标选取原则，完善节约和集约用地的评价指标结构层，特别是农用地和农村宅基地等土地利用类型的评价指标，建立区域和土地利用分区的节约与集约利用土地评价指标体系，以湖南省为例，运用层次分析法，得出湖南省土地节约与集约利用水平的动态变化发展趋势以及农用地集约利用的效益，最后利用加权求和的综合方法，计算出湖南省农用地集约利用水平的综合评价值。