Nowadays, in many countries around the world, abandoned railways are considered as important resources that can be recovered and converted into greenways, thanks to their specific adaptability to this function. With its about 1000 km of dismantled lines, Sicily is the Italian region where the abandonment of railways is more evident. Nevertheless, to the present day, only about 20 km have been converted in greenways. As a recovery action requires large investments, it is necessary to determine a priority list based on the actual suitability of a track to be converted. Therefore, the aim of this paper was to define and apply a methodology, based on multi-criteria analysis associated with geographical information system (GIS), for the assessment of different suitability degrees of an abandoned railway to be converted in greenway for agro-touristic and cultural use of the land. The work was developed on two abandoned railway lines, sited in the province of Syracuse, embedded in landscapes of great value thanks to the existence of natural areas and cultural heritage. The applied method attributes great importance to the quality of the landscape that is considered in the same way as the intrinsic characteristics of the track. Several indicators were weighed and spatially mapped to describe the local resources at the margin of the track and the characteristics of the stretches of the two lines. The GIS analysis allowed obtaining various intermediate maps containing the necessary information for drawing the ultimate maps, which showed the suitability of each line to be converted in greenway. The results showed that the suitability level depends on the specific characteristics of the railroad and its marginal values, as well as on the quality of the landscape and the development opportunities that it offers. The creation of greenways can thus become a support to make easier the integration between the landscape and the growing demands of land, economic and tourist development, while maintaining intact the rural land and favoring its connection with the urban centers. The study, although referred to specific territorial areas, is generally valid from a methodological point of view and can be applied in other contexts.

随着中国城镇化步入中后期发展阶段，以及空间规划改革与高质量发展的时代背景下，城市更新是存量时代城市空间可持续发展的关键议题。但目前还存在着城市更新在国土空间规划体系中定位不清晰等问题，如何更好地推动新时代国土空间规划衔接和融入城市更新，作为解决城市病、进行城市空间治理的有效手段亟待探索。简要梳理城市更新研究进展，以英国伦敦的大型城市更新规划—机遇区规划作为典型案例，分析机遇区规划的概念内涵、演变过程及不同类型，重点解析以金融和创新产业为重点的商业发展型、以维护和延续历史风貌为重点的文化旅游型、以棕地修复和发展绿色产业为重点的工业发展型等三种具有代表性典型机遇区规划项目。在此基础上，提出英国伦敦机遇区更新规划对中国国土空间规划的启示：在五级三类国土空间规划体系中明确城市更新的定位及编制要求与标准；以城市更新为抓手，促进城市存量空间人居环境质量与社会公平和谐；对不同类型城市以及城市不同类型地块，均需因地制宜地构建差异化的城市更新策略；借鉴基于自然的解决方案，尊重城市区域的自然资源本底和地理属性特征；延续城市历史文脉，挖掘打造地方性、有特色的城市精神。

铁路是国民经济和社会发展的重要基础设施。伴随中国经济发展和城市化进程,铁路运营里程快速增加,用地规模不断扩大。但受行业特点、线路规划、功能设计、土地管理等因素的影响,既有铁路用地中存在一定数量的低效利用或废弃闲置土地。由于铁路用地具有公益性、无偿划拨性、使用无期限性等特点,在当前支持盘活现有铁路用地、鼓励实施土地综合开发的背景下,根据既有铁路用地的利用性质及设计功能的发挥情况,在对土地利用效率进行综合分析的基础上,针对低效（闲置）铁路存量用地的资源条件和利用态势提出优化开发途径,结合潜在利用方向进行综合潜力评价,进而提出综合开发利用策略是促进土地节约集约利用的有效途径。研究以建设用地改造方向为重点,选取南京市区范围内4宗低效（闲置）铁路存量用地进行案例分析,以期为开展低效（闲置）铁路存量用地的综合开发利用提供分析思路,对推进铁路存量用地的合理开发、有效利用提供策略参考。

Railway is one of the important infrastructures for national economic and social development. With the rapid development of railway construction, the railway land is constantly expanding. There exist a certain number of inefficient/idle railway lands, which are induced by the industrial characteristics, railway route planning & functional design, land resource management and other factors. There are certain characteristics of railway lands including public welfare, free transfer, and unlimited duration of usage. Under the circumstances of increasingly prominent bottleneck of land resources, the comprehensive development and utilization of inefficient and idle railway land resource is of great significance, which will enhance the efficiency of resource utilization, improve the value of land resource, promote the regional development and improve the quality of environment. In order to promote the healthy development of railway industry and speed up the reform of railway enterprises, currently, several policies were proposed to revitalize the existing railway land and raise the efficiency of land use. It is of great significance to fully exploit the inefficient /idle railway land resources on the basis of ensuring the safety of railway transportation. The efficient use of the stock of railway land not only performs in the utilization benefit, but also reflects in the dynamic temporal changes. According to current situation of railway land use and the utilization efficiency, the stock of railway land can be divided into three categories, including normal use, inefficient use and idle state. There is a certain number of reserved land for development in practice because of the particularity of railway planning. In order to bring the inefficient and idle railway land resources into full play, a reasonable approach of comprehensive development and utilization should be adopted. Combining with the type of land use, land-use efficiency, city planning and other factors, this paper proposed a utilization strategy based on the potential evaluation of inefficient/idle railway lands. Meanwhile, the reform of inefficient/idle railway land into construction land can be divided into several categories, such as commercial service industry, urban landscape transformation, urban rail transportation, industrial warehousing services, etc. The selections of the corresponding comprehensive utilization types are based on the location, the traffic convenience, the completeness of service facilities, and other aspects of site conditions. Four cases of inefficient and idle railway land in Nanjing city were selected as study cases. By using the comprehensive evaluation framework and multi-source data, the results demonstrate the effectiveness of the methodology.

The rapid process of urbanization and climate change have resulted in socio-environmental issues that necessitate viable intervention strategies to create green, sustainable, healthy, and livable built environments. One effective method of achieving this is through the development of pocket parks. Although several studies have explored the benefits and design principles of pocket parks, there is a lack of systematic and quantitative understanding, which could influence the decision-making process for the proper adoption of pocket parks. In view of this knowledge gap, this study employs bibliometric methods and critical review to quantitatively analyze and systematically review 276 papers published in the Web of Science and Scopus databases between 1977 and 2023. Firstly, a bibliometric analysis is conducted, providing a comprehensive overview of research on pocket parks. Secondly, a detailed critical review is conducted from three major perspectives: influencing factors, design methods, and benefits of pocket parks. Finally, the research trends and future directions are discussed. The results indicate that (a) pocket park development takes various forms, with a growing number of articles published each year. However, research on this topic is primarily concentrated in the United States and China, with significant knowledge gaps remaining globally. (b) The utilization of pocket parks is affected by various factors, including internal, external physical, and socio-economic factors. The mechanisms of these factors and their interactions demand deeper understanding. (c) There is a need to conduct an in-depth exploration of planning methods for pocket parks, and planning and design methods in different country contexts can be expanded and compared. (d) Further research is needed to compare the benefits of pocket parks in different climatic zones in terms of depth and width. The outcome of this study can contribute to the body of knowledge on pocket parks, foster their wider acceptance, and help urban planners, practitioners, policy makers, and government managers apply them more effectively in resilient and livable cities of the future.

以典型旅游地云南省为研究案例地,基于高德交通大数据、电子地图POI等多源数据,通过构建综合交通服务功能与旅游强度概念模型,采用改进的TOPSIS法、耦合协调模型和Tobit模型,从时空视角审视交通服务功能与旅游强度协调空间分异特征及不同交通服务功能对旅游强度的贡献效应。结果表明：（1）2006—2016年,云南省各州市综合交通服务功能与旅游强度协同效应逐渐凸显,协调主导类型由“濒临失调型”跃迁为“初级协调型”。（2）综合交通服务功能与旅游强度协调度总体格局呈“中部高,东西两侧和南北两翼低”的空间布局态势,且东西分异剧烈,南北变化相对平稳;区域差异特征呈现“滇中>滇东南>滇西南>滇西>滇西北>滇东北”俱乐部趋同空间态势;不同交通方式与旅游强度协调度空间分异特征存在显著差异。（3）公路、铁路、航空对旅游强度的贡献效应表现为“航空运输>公路交通>铁路交通”的不均衡特征;旅游地居民收入、旅游资源禀赋、市场化程度均对旅游强度呈现正向促进效应,但对外开放水平较低一定程度上制约了区域旅游强度提升。