面向业务用户的地理信息服务语义集成方法研究     

刘勇  李成名 《测绘科学》2011,36(1):92-95

本文分析了面向业务用户的地理信息服务集成存在的问题,总结了地理信息服务集成研究进展,讨论了面向业务用户的地理信息服务集成的概念、特征,提出了一个面向业务用户的地理信息服务语义集成框架和集成过程,并通过实例验证了本文的方法.  相似文献   

基于决策树方法的区域可达性研究——以浙江省为例     

王伟娜  葛莹 《测绘科学》2011,36(2):158-161

本文以浙江省为研究区,在筛选并提取主要地理因子、计算主要城市节点可达性并利用Kriging插值方法获取可达性扩散表面的基础上,通过空间叠加将可达性与地理因子进行有效叠合,并采用空间采样方法获取采样数据,构造训练集。最后利用J48决策树算法对训练集进行归纳学习,构建并分析决策树,从而解释可达性与地理因子之间的相关模式。  相似文献   

新疆1：10000基础地理信息数据库设计与实现     

辛海强  刘斌 《测绘与空间地理信息》2011,34(4):53-55

建立1∶10 000基础地理信息数据库是实现省级地理信息公共服务的基础,新疆面积大、数据庞杂,与其他省区相比,其建库工作具有独特性。文章在充分调研、借鉴其他省区先进经验的基础上,结合本地实际,采用最新的理论和技术开展系统的设计和实现,完成了数据的加工整理和高效质检入库,解决了海量数据快速入库、数据动态更新、历史数据管理...  相似文献   

基于大比例尺城市地理信息数据批处理与质检系统设计与实现     

周玉刚  郑春雨  朱晓东  李冰洋 《测绘与空间地理信息》2015,(8)

立足于城市地理信息系统建设的总体目标,结合数字城市、智慧城市建设的实际需求和工作操作流程,在已有基础地理信息资料和技术的基础上,应用计算机技术、GIS技术的处理技术和方法,构建大比例尺城市地理信息数据批处理和质检系统。该系统可以为数字城市、智慧城市的大比例尺地理信息数据生产提供技术支持,减少生产成本,提高工作效率和数据生产质量,同时可以大量减轻作业人员和质检人员的工作量,也为数字城市和智慧城市的业务系统建设带来了新的数据解决方案。  相似文献   

ArcGIS SDE在地理国情普查中的应用     

礼晟东  王明亮  李影 《测绘与空间地理信息》2015,(9):145-146

主要介绍ArcSDE的基本概况,根据地理国情普查过程中栅格数据及地理数据库存储量大的特点,讨论了ArcSDE在地理国情普查生产中的应用。  相似文献   

The eastern industrial zone in Ethiopia: Catalyst for development?     

《Geoforum》2018

In 2000, China agreed to share with African countries its experience in the field of investment promotion relating to the establishment and management of special economic zones. The Eastern Industry Zone was subsequently established. Of the various zones being built in Africa, Ethiopia's perhaps represents one of the biggest challenges to both the Chinese developers and the host government alike. Utilising insights from evolutionary economic geography and the work of Albert Hirschman, this article seeks to analyse the progress thus far in the Ethiopian SEZ. Spatially discrete, unfocused in terms of clustering and with few linkages to the wider economy, what impact, if any, the development of this zone will have on Ethiopia's structural transformation is discussed. The implications for Ethiopia's wider investment in industrial parks as part of its developmental state project is also drawn out.  相似文献   

Health and safety in garment workers’ lives: Setting a new research agenda     

《Geoforum》2018

Amidst new global initiatives to promote garment workers’ health and safety following a spate of deadly factory disasters across the Global South, this critical review calls for an expanded research agenda that looks beyond the workplace to examine the complex politics, spatialities, and temporalities of garment workers’ health and wellbeing. Drawing on ethnographic research on garment workers across South Asia, we argue against a narrow, technocratic, and depoliticised emphasis on physical infrastructures and building safety, and advocate instead a more holistic and politically-engaged research approach to the everyday health and wellbeing of workers. A conceptual focus on health and wellbeing offers a window onto workers’ employment experiences and reveals how routine work pressures, exhaustion and ill health are shaped by the dynamics of global supply chains, even well after workers have disengaged from these global circuits. Understanding how garment work affects workers’ wellbeing and their prospects for a fulfilling life requires research that moves beyond the workplace and covers the entire life course.  相似文献   

Geographies of Young People: The Morally Contested Spaces of Identity     

《The Professional geographer》2003,55(1):106-107

  相似文献   

Spatiotemporal data model for network time geographic analysis in the era of big data   总被引：1，自引：0，他引：1  

Bi Yu Chen  Hui Yuan  Shih-Lung Shaw  William H.K. Lam  Xiaoling Chen 《International journal of geographical information science》2016,30(6):1041-1071

There has been a resurgence of interest in time geography studies due to emerging spatiotemporal big data in urban environments. However, the rapid increase in the volume, diversity, and intensity of spatiotemporal data poses a significant challenge with respect to the representation and computation of time geographic entities and relations in road networks. To address this challenge, a spatiotemporal data model is proposed in this article. The proposed spatiotemporal data model is based on a compressed linear reference (CLR) technique to transform network time geographic entities in three-dimensional (3D) (x, y, t) space to two-dimensional (2D) CLR space. Using the proposed spatiotemporal data model, network time geographic entities can be stored and managed in classical spatial databases. Efficient spatial operations and index structures can be directly utilized to implement spatiotemporal operations and queries for network time geographic entities in CLR space. To validate the proposed spatiotemporal data model, a prototype system is developed using existing 2D GIS techniques. A case study is performed using large-scale datasets of space-time paths and prisms. The case study indicates that the proposed spatiotemporal data model is effective and efficient for storing, managing, and querying large-scale datasets of network time geographic entities.  相似文献   

A framework for identifying activity groups from individual space-time profiles     

Jianan Shen  Tao Cheng 《International journal of geographical information science》2016,30(9):1785-1805

ABSTRACT

Datasets collecting the ever-changing position of moving individuals are usually big and possess high spatial and temporal resolution to reveal activity patterns of individuals in greater detail. Information about human mobility, such as ‘when, where and why people travel’, is contained in these datasets and is necessary for urban planning and public policy making. Nevertheless, how to segregate the users into groups with different movement and behaviours and generalise the patterns of groups are still challenging. To address this, this article develops a theoretical framework for uncovering space-time activity patterns from individual’s movement trajectory data and segregating users into subgroups according to these patterns. In this framework, individuals’ activities are modelled as their visits to spatio-temporal region of interests (ST-ROIs) by incorporating both the time and places the activities take place. An individual’s behaviour is defined as his/her profile of time allocation on the ST-ROIs she/he visited. A hierarchical approach is adopted to segregate individuals into subgroups based upon the similarity of these individuals’ profiles. The proposed framework is tested in the analysis of the behaviours of London foot patrol police officers based on their GPS trajectories provided by the Metropolitan Police.  相似文献