Interactive mapping of urban tree benefits using Google Fusion Tables and API technologies

Geographic Information Systems (GIS) and web-based GIS platforms are typically used by large organizations and government agencies for the purpose of data storage, query, analysis, and spatial data mapping. Google Fusion Tables, however, provides cloud-based computing services for data management and easy user collaboration through the Google Maps interface. Fusion Tables are oriented towards smaller organizations that previously were unable to publish data online due to limitations of database knowledge, high cost of start-up, and restrictions on implementation. In this research project, we assess the functionality and limitations of Fusion Tables and associated API as a spatial data management system by programming an interactive web-based mapping platform, the CityTrees.ca Project, designed to showcase the benefits of trees growing on the campus of Ryerson University, Toronto. Specifically, Fusion Tables functionality, such as data storage and manipulation, is used to build a query interface (both attribute and spatial) that permits users of CityTrees.ca to search for and map trees by species, diameter, height, and location. We found that Fusion Tables performed well as a storage medium for our campus tree data, which could easily be explored through our creation of a JavaScript-enabled query tool. Our project provides a unique roadmap for small to medium-sized urban forestry organizations and environmental non-profits seeking to create interactive mapping applications where data privacy and advanced spatial analysis are not fundamental.     

Evaluation method of the ecological benefits of urban green spaces and application conditions

The importance of ecological benefit analyses about green space systems has been widely discussed on the basis of a per-ceived bias towards the landscaping effect of green spaces to be built in urban areas as opposed to the perception of comprehensive ecological benefits of designed plant communities. Given the basic principle of ecological benefit analyses and evaluation methods widely applied today, the methodology to calculate ecological benefits and to model the expansion of urban green spaces by CITY-green 5.0 and its conditions for application were explored. We propose that aerial images can be substituted by AutoCAD graphics of a green space containing detailed information of plant dispositions by digitizing the key features during the working process in order to evaluate the ecological benefits quickly and to offer proper guidance to the establishment of small scale green spaces in urban areas. The theoretical foundation, potential application range and prospects for extension of the method are introduced by using the analysis of ecological benefits of the green spaces on the campus of Southwest Forestry College, Kunming, as an example.     

郑州市休闲农业空间分布特征分析

休闲农业作为拓展城市旅游的朝阳产业,满足了城市居民日益增长的游憩需求,同时也为城市发展提供了未来储备。笔者以郑州市为例,综合空间地域、分布类型、交通可达性等多种因素,对郑州市休闲农业的空间特征进行分析评价,并针对休闲农业存在的问题,从规划合理性、类型多样性、空间可达性和提高参与性等方面提出了一些建议,旨在推动郑州市休闲农业的合理化均衡化发展,同时也为城市规划、旅游规划、政府合理优化景点布局等提供参考。     

基于SCIE中分子生物学文献的分析

利用SCIE数据库,统计分析了1995-2008年间的分子生物学（molecular biology）研究文献以及收录中国学者的文献,并利用该数据库所带的分析工具（Results Analysis）,对所获得的数据做进一步的挖掘。探讨了分子生物学文献研究的年代分布、语种、文献类型、期刊分布、作者、学科以及发文量前10名的国家和机构,以期了解世界各国在这一研究领域的进展情况。     

四川省南充市GIS土壤数据库系统设计的理论研究

在调查、收集大量土壤资料的基础上,以地理信息系统(G IS)为支撑、以试验对比分析作验证,对南充土壤数据库设计与应用进行了系统的研究,首次建立基于G IS的南充市土壤数据库系统,提出了建立市级土壤数据库系统的原则、方法、模式和土壤数据库系统推广应用新的技术路线。     

Research on Heterogeneous Data Sharing in Early Warning System for Grain Security

The data nodes with heterogeneous database in early waming system for grain security seriously hampered the effective data collection in this system.In this article,the existing middleware technologies was analyzed,the problem-solution approach of heterogeneous data sharing was discussed through middleware technologies.Based on this method,and according to the characteristics of early warning system for grain security,the technology of data sharing in this system were researched and explored to solve the issues of collection of heterogeneous data sharing.     

三亚市土地利用变化及影响因素驱动力分析

在RS与GIS技术支持下,以三亚市1987、1999、2008年TM影像为主要数据源,研究了三亚市土地利用空间格局特征及其动态变化,利用SPSS软件对社会经济因素进行主成份分析,并对土地利用变化进行逐步回归分析,探讨三亚市土地利用驱动变化机制.结果表明:1987～ 2008年三亚市土地利用变化的基本特点是农业用地面积大幅度下降,非农用地面积快速增加;影响土地利用类型结构变动的主导驱动因子是经济社会综合因素、旅游业发展和农业生产因素;固定资产投资和非农业人口的剧增使三亚市城镇化面积增大,建设用地面积增加,人口和农机总动力变化直接导致林地和耕地的持续减少;依托自然地理优势,三亚市旅游发展迅速,生态建设投入增加,园地面积直线上升.     

气象站数据的自动传输及其在Web网页上的动态实时查询

基于ASP．NET2．0技术的系统设计实现了由地面气象测报软件生成的数据库B文件的定时自动传输;编制Web应用程序,实现了气象站监测信息在Web页面的交互式动态实时查询。在IIS服务器上建立Web站点,实现了气象站监测信息的发布与共享。对这一系统的设计思路、设计方案进行了介绍,以期促进气象工作的开展。     

北部湾二长棘犁齿鲷的时空分布特征

二长棘犁齿鲷(Evynnis cardinalis)作为北部湾主要经济鱼类之一,长久以来受过度捕捞的影响,其资源量发生较大波动,将对渔业生产和种群结构有较大影响。文章根据2014年~2015年近海渔业资源调查资料,应用生物量和个体数单位捕捞努力量渔获量(CPUE)综合分析该鱼种资源的季节变化和空间分布。结果表明该鱼种广泛分布于北部湾中国管辖海域内,四季的出现率均在86%以上。生物量和个体数CPUE有明显的季节变化,均表现为最高值在夏季(平均值分别为7.3 kg·h~(-1)和240.83尾·h~(-1)),而冬季最低(平均值分别为1.76 kg·h~(-1)和21.94尾·h~(-1))。从空间分布看,生物量和个体数CPUE高值区主要分布于北部湾20°N以北海域,而低值区则处于海南岛西部海域。近年来在该海域实施的资源养护措施已取得初步成效,相比于20世纪90年代,二长棘犁齿鲷的资源量有所恢复。但二长棘犁齿鲷生物学特征分析结果表明,体长200 mm或体质量80 g以上的群体比重总体偏低,种群低龄化和小型化问题仍较为严峻,需采取新的管理措施(增大最小网目和开捕体长),以降低捕捞强度,改善种群结构。     

基于三层结构的基本农田信息管理与辅助决策系统研究

按照基本农田建设和管理的要求,通过选取评价指标,引入背包算法建立耕地入选基本农田的模型。在此基础上,采用C#、Mapinfo MapXtreme 2004和SQL Server2000三者结合开发基于三层结构的基本农田信息管理与辅助决策系统,使GIS技术与空间决策模型有机结合,实现了数据管理、耕地入选基本农田决策模型和用户管理等功能。实例表明,该系统具有较高的灵活性和可扩充性。