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1.
Thinking about and with images has long been central to the practice of geographical fieldwork. This paper considers how the participation of images in urban-based fieldwork might be understood in the wake of non-representational theories. Drawing upon our experience of co-teaching an urban-based field course in Berlin, we discuss three ways in which such theories allow us to make more of the participation of images in the thinking-spaces of urban fieldwork. Specifically, we consider how images afford opportunities for attending to everyday ecologies of materials and things; for thinking through the rhythms of urban environments; and for producing affective archives. In concluding we suggest that thinking with images in urban fieldwork can be understood as part of the elaboration of ecologies of non-representational ethico-aesthetic practices. 相似文献
2.
Xiaoping Liu Jialv He Jinbao Zhang Haolin Liang Huan Wang 《International journal of geographical information science》2017,31(8):1675-1696
Urban land use information plays an important role in urban management, government policy-making, and population activity monitoring. However, the accurate classification of urban functional zones is challenging due to the complexity of urban systems. Many studies have focused on urban land use classification by considering features that are extracted from either high spatial resolution (HSR) remote sensing images or social media data, but few studies consider both features due to the lack of available models. In our study, we propose a novel scene classification framework to identify dominant urban land use type at the level of traffic analysis zone by integrating probabilistic topic models and support vector machine. A land use word dictionary inside the framework was built by fusing natural–physical features from HSR images and socioeconomic semantic features from multisource social media data. In addition to comparing with manual interpretation data, we designed several experiments to test the land use classification accuracy of our proposed model with different combinations of previously acquired semantic features. The classification results (overall accuracy = 0.865, Kappa = 0.828) demonstrate the effectiveness of our strategy that blends features extracted from multisource geospatial data as semantic features to train the classification model. This method can be applied to help urban planners analyze fine urban structures and monitor urban land use changes, and additional data from multiple sources will be blended into this proposed framework in the future. 相似文献
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4.
城市新区开发的理论与实践 总被引：1，自引：0，他引：1
近年来,随着我国城市郊区化的日益明显,城市新区作为郊区化的主要载体日益受到关注。文章分析了城市新区的概念,认为城市新区是城市郊区化过程中各种新城市地区的高级形式。从经济、社会、环境三种驱动力量的角度分析总结了城市新区开发的理论体系。并比较了中西方城市新区开发的异同,认为西方国家城市新区开发更注重社会因素,而我国城市新区开发更注重经济因素。最后指出我国城市新区开发中的问题及对策。 相似文献
5.
Tim Bunnell 《Singapore journal of tropical geography》2023,44(1):12-21
C.P. Pow became a significant part of my own academic journey from soon after I joined the National University of Singapore (NUS) in 1999. Our academic inspirations, interests and identities overlapped, and we had opportunities to co-teach and co-write. I use these overlaps and collaborations as a way into reflecting on Pow's work, mainly during the period up to when he received tenure at NUS in 2011. I focus on two substantive themes. The first has to do with how and why Pow approached the landscape of Singapore beyond the visual or the ‘seen’. The second theme concerns the origins, development and consolidation of Pow's contributions to examining urban Asia in ways that unsettle Anglo-American-derived generalizations. 相似文献
6.
ABSTRACTThe 21st century has been called the “century of the city” and compounded concerns that current development pathways were not sustainable. Calls for scholarship on urban sustainability among geographers cites strengths in the human-environment and urban subfields that positioned the discipline to make unique contributions to critical research needs. This special issue reflects on the contributions that geographers have made to urban sustainability scholarship. We observe that that integration across human-environment and urban subfields reflects broader bifurcations between social theory and spatial science traditions in geography. Piggy-backing on the rise of sustainability science, the emergence of urbanization science compels geographers to reflect upon the ways in which we are positioned to make unique contributions to those fields. We argue that those contributions should embrace systems thinking, empirically connect social constructs to biophysical patterns and processes, and use the city as a laboratory to generate new theories. 相似文献
7.
城市规划建设的绿地功能应用研究新思路 总被引：21，自引：0，他引：21
城市绿地作为城市中最易感知的半自然因素，具有比较突出的生态功能、社会功能以及经济效益，能够改善城市的生态环境。该文对城市绿地功能在城市规划建设中的应用进行分析，指出其存在的问题，以生态学以及景观生态学的理论方法重新思考城市绿地功能在城市规划建设中的综合运用，重点探讨城市绿地与城市空间结构关系、城市绿地景观生态规划以及城市绿地生态系统服务功能价值评估等研究热点。综合分析发现，将绿地功能研究运用到城市规划建设中，有利于城市空间的可持续发展和城市生态环境的改善。 相似文献
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城市更新是城市发展的一种重要方式,其关键和难点在于平衡利益相关者之间的权益博弈。在城市化快速发展时期,我国便出现了大规模的城市更新,这使得我国城市更新中的权益博弈形成了独特的模式与特征,较之于西方发达国家也更加复杂。文章认为随着我国城市更新研究的不断深入,在权益博弈研究领域取得了一定的成果,但也存在一些问题与不足,如对博弈主体间的关系研究不足、对城市更新中的“社会运动”现象研究不够,未来的研究需要综合运用多学科理论,注重典型个案的深入研究,逐步构建出合乎中国国情的城市更新权益博弈理论。 相似文献
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Aidan Mosselson 《Urban geography》2019,40(1):16-36
This paper examines the tactics, underpinning logics and forms of legitimacy through which urban security is produced and maintained in a volatile urban environment. I argue that urban security relies on subtle, mundane practices, in addition to the use of force. Drawing on original empirical research carried out in inner-city Johannesburg, the article makes a novel contribution by combining literature from policing and security studies with work on gentrification, ambient power and the privatization of public space. Overall, the article aims to emphasize the ways in which social and spatial realities shape security and policing practices, and broaden our understanding of the rationales, logics and meanings of urban security, particularly in volatile, conflictual urban spaces (mostly, but not exclusively) in the Global South. 相似文献
10.
ABSTRACT Urban greening, the improvement or increase of green spaces in cities, has purported environmental, individual, social and cultural benefits. The extent and qualities of urban green spaces, and our opportunities to engage with them, reflect and shape human responses to those spaces. Planning scholars recognise the traditional role and obligation of planning to help reduce social problems and see the potential for the public to be leaders in defining responses. However, use of technical, scientific and economic approaches by urban land managers can limit recognition of diverse connections to urban green and advance narrow conceptions of nature. We sample people’s responses to different forms of urban green and greening in three case studies from Melbourne, Australia. We show that modern connections and expressions are personal, social and dynamic. Human experiences are embedded in nature and connections develop from interactions with and about nature, in formal and informal spaces. Diverse connections prompt responses to nature, and actions affecting nature itself. Accordingly, we propose ways to develop more receptive, responsive, inclusive and connected forms of urban greening. These include recognising diverse connections and expressions, encouraging dynamic relationships with nature, and providing varied ways of engaging with urban green spaces that foster stewardship. 相似文献
11.
Tao Pei Carlo Ratti Shih-Lung Shaw Ting Li Chenghu Zhou 《International journal of geographical information science》2014,28(9):1988-2007
Land-use classification is essential for urban planning. Urban land-use types can be differentiated either by their physical characteristics (such as reflectivity and texture) or social functions. Remote sensing techniques have been recognized as a vital method for urban land-use classification because of their ability to capture the physical characteristics of land use. Although significant progress has been achieved in remote sensing methods designed for urban land-use classification, most techniques focus on physical characteristics, whereas knowledge of social functions is not adequately used. Owing to the wide usage of mobile phones, the activities of residents, which can be retrieved from the mobile phone data, can be determined in order to indicate the social function of land use. This could bring about the opportunity to derive land-use information from mobile phone data. To verify the application of this new data source to urban land-use classification, we first construct a vector of aggregated mobile phone data to characterize land-use types. This vector is composed of two aspects: the normalized hourly call volume and the total call volume. A semi-supervised fuzzy c-means clustering approach is then applied to infer the land-use types. The method is validated using mobile phone data collected in Singapore. Land use is determined with a detection rate of 58.03%. An analysis of the land-use classification results shows that the detection rate decreases as the heterogeneity of land use increases, and increases as the density of cell phone towers increases. 相似文献
12.
Simulating artificial cities in a GIS environment: urban growth under alternative regulation regimes
Fulong Wu Christopher J. Webster 《International journal of geographical information science》2013,27(7):625-648
This paper reports on an attempt to combine neo-classical urban economic theory with complex systems methods. The innovative feature of our model from the point of view of conventional economic theory lies in its explicit treatment of spatial relationships and time sequence. From the perspective of raster or cellular GIS models of urban processes, the work is innovative in that it replaces the more usual heuristic cell-transition rules with micro-economic theory. The mix of modelling paradigms is not unproblematic, however, and we discuss the challenges encountered at this research frontier. These notwithstanding, our hybrid model has the potential to be used as a GIS-based laboratory for exploring micro-economic propositions, particularly those relating to urban processes that are path dependent. The version of the model reported simulates spatially equilibriated path dependent futures of a city governed by local development decisions that are at partial equilibria in the neo-classical sense. Two simulations are described which permit visual and economic exploration of (a) an explicitly spatial version of the economic theory of externalities and (b) a new theory of densification. The dual paradigm (Cellular Automata-neo-classical economics) leads to an interesting class of simulations in terms of stability. Economically our simulated cities become increasingly efficient, in terms of private and social product. The long-run economic equilibrium is achieved by many individually efficient negotiations based only on local information. There is no parallel long-run spatial equilibrium however. The spatial configuration of land uses is constantly shifting as a result of randomness in the land use bidding process. The spatial instability is, however, limited by the self-organised drive for greater overall economic efficiency. In economic terms, the model's spatial instability represents random re-allocation of land-use within a set of Pareto-efficient spatial configurations - an intriguing result that we intend to follow up in future work. 相似文献
13.
马克思主义地理学既是人文地理学的重要流派,也深刻影响了其他学科领域。大卫·哈维的《社会正义与城市》是马克思主义地理学的奠基之作。由于该书理论性强,涉及很多大而复杂的问题,因而也很难解读。哈维试图从整体视角理解和剖析城市(化)问题,创新了“社会进程—空间形式”的理论。通过比较自由主义与马克思主义的城市研究方法论,得出理论的本质在于方法和哲学的综合,空间的本质在于人的实践,正义的本质取决于社会进程的运行,城市化的本质是资本生产的需要和产物的结论。该书开创了马克思主义地理学的知识地基,开辟了城市研究的批判路径,开拓了当代马克思主义的生长点。中国知识分子应该密切关注不平衡的城市化,提出新发展阶段的“城市总问题”,坚持和强化思想研究,通过对不同经典理论的症候阅读,围绕时代问题大胆进行理论革命。 相似文献
14.
TOWARD ESTABLISHING THE CONCEPT OF PHYSICAL URBAN AREA IN CHINA 总被引：1，自引：0，他引：1
I.IntroduchollWiulegeOgraphystudiestheterritoria1systemsabouttherelationsbforeenhumanbeingSandthenature[I4],urbanmpaphyfocusesspecificallyonthespatialoopltizationandprocessofurbanterritory,anditsinteraCtionwiti1Otherterritorialsystems.Usually,wedoresearch… 相似文献
15.
Mei‐Po Kwan 《The Professional geographer》2007,59(4):434-446
The widespread use of mobile communications is leading to new practices in family life and social life, and these changes have significant implications for the study of urban travel. Because of the adoption of new modes of space‐time coordination, changing time use and increasing mobility, changing use of existing urban nodes, the blurring of boundaries between home and work, the importance of social networks and social capital, and the shift to person‐to‐person connectivity, the spatial structure and processes of interaction among individuals have become much more complicated in this age of mobile communications. Static spatial frameworks based on fixed points (e.g., home or workplace) and distances among them are no longer adequate for understanding urban travel. The study of urban travel now needs new conceptualizations and new methodologies. 相似文献
16.
开封市的城市生态位变化分析 总被引：17，自引：0，他引：17
城市生态位作为生态学重要理论之一,用于分析城市生态不同功能模块间竞争、演化等现象。通过以开封市不同功能模块为研究对象,在各模块污染指数和适宜度指数的基础上,运用生态位理论和方法,探讨改革开放以来,特别是近十年来开封市不同功能模块生态位格局变化规律,并对变化的原因进行了分析。研究结果表明：(1) 1994~2003年开封市自然生态环境系统各模块生态位呈上升趋势的有大气环境模块、城市绿化模块,而呈下降趋势的有水环境模块、声环境模块。(2) 1994~2003年开封市经济系统各模块生态位呈上升趋势的是第三产业模块,呈下降趋势的是第二产业模块,而变化不大的是第一产业模块。(3) 1994~2003年开封市社会系统各模块适宜度生态位呈上升趋势的有社会基础设施模块、社会资源配置模块、社会生产与保障模块,而呈下降趋势的只有人口模块。(4) 国家政策体制的改革是改革开放以来特别是近十年来开封市各功能模块生态位发生变化的最直接和最根本的原因。该研究不但对城市不同功能模块的宏观规划、经济发展和环境保护有具体的指导意义,而且对拓展城市生态学理论、研究复合生态系统的内在作用机制也同样具有重大的理论和现实意义。 相似文献
17.
Urban aquatic restoration can be difficult to accomplish because of complications like industrial pollutants, population density, infrastructure, and expense; however, unique opportunities in urban settings, including the potential to provide benefits to many diverse people, can make urban restoration especially rewarding. The success of urban restoration projects—even those focused primarily on ecological targets—depends on community involvement and managers considering community needs. However, research on the social barriers to urban restoration and strategies managers use to overcome them is relatively rare. This work attempts to fill that gap by presenting barriers for aquatic restoration projects in urban settings and strategies to overcome them. Building from interviews with restoration managers involved in urban aquatic restoration projects in Rhode Island, we contribute through an adaptive management approach: identifying and synthesizing the lessons learned from managers’ work in urban settings. Ultimately, we suggest potential for double- and triple-loop learning by disentangling and critiquing the frames and policy/power structures that influence decision making in urban aquatic restoration. 相似文献
18.
This paper is positioned within current debates on education development and the value of fieldwork as a pathway to fostering a nuanced, sophisticated and empathetic world view among students. Here, we focus on one form of field‐based teaching within geography, that is, intensive field studies courses taught abroad. We draw on our experience as cofacilitators of a six‐week intensive field course conducted in various parts of Thailand. The course we discuss in this paper was focused on teaching students both applied research skills (critical engagement, ethnographic research methods and ethical research practice) and substantive content (the social, cultural, political and economic aspects of Thailand from a geographer's perspective). We argue that the value of field studies lies in the ability of such a course to help students enhance and deepen broad, generalisable skills such as problem solving; ethical research practice; critical engagement with complex social issues; and independent research skills. 相似文献
19.
Geo-temporal Twitter demographics 总被引：1，自引：0，他引：1
Paul A. Longley Muhammad Adnan 《International journal of geographical information science》2016,30(2):369-389
This paper seeks and uses highly disaggregate social media sources to characterize Greater London in terms of flows of people with modelled individual characteristics, as well as conventional measures of land use morphology and night-time residence. We conduct three analyses. First, we use the Shannon Entropy measure to characterize the geography of information creation across the city. Second, we create a geo-temporal demographic classification of Twitter users in London. Third, we begin to use Twitter data to characterize the links between different locations across the city. We see all three elements as data rich, highly disaggregate geo-temporal analysis of urban form and function, albeit one that pertains to no clearly defined population. Our conclusions reflect upon this severe shortcoming in analysis using social media data, and its implications for progressing our understanding of socio-spatial distributions within cities. 相似文献