共查询到20条相似文献，搜索用时 343 毫秒
1.
Struts在基于ArcI MS属性数据查询中的应用 总被引：2，自引：0，他引：2
MVC模式是基于Web应用的一种非常理想化的设计模式。Struts技术提供了实现MVC设计模式的最好工具。由于ArcIMS并没有给出与网络应用有关的解决方法,在基于ArcIMS的网络GIS系统中采用Struts来实现属性数据的查询,使设计思路和程序流程以清晰的MVC模式表达和实现,有利于网络GIS系统的功能扩展、代码维护及网站建设。 相似文献
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Participatory modeling is an important approach for solving complex geo-problems from a comprehensive and holistic viewpoint, and it brings together stakeholders from multiple disciplines to provide diverse resources, including modeling, data fields and computational assets. Data configuration work (e.g., preparing appropriate input data for model execution, connecting a model’s output to the input data of another model) is important for constructing and executing a participatory modeling task. Most current data configuration methods depend on the model integration logic, which presents a challenge when adding new modeling resources into a model to dynamically create and execute new modeling tasks. To support the construction of participatory modeling tasks in a web environment, this article proposes a loosely integrated data configuration strategy for decoupling data configuration work from the execution process of a participatory modeling task. A model service controller is designed for model input/output (I/O) configuration, and a data service controller is designed for data access configuration. These two controllers can help modelers link the data I/O demands of a model-service with the appropriate data-services; thus, different modeling instances can be dynamically joined to a participatory modeling task and executed without reconstructing the original data configuration settings. A prototype participatory modeling system is proposed to demonstrate the flexibility and feasibility of the proposed method using an experimental modeling case. The results show that the proposed data configuration strategy supports the integration of different model-services based on the data dependency relationships and that the complexity and difficulty in configuring data for a participatory modeling tasks in the web environment are minimized. 相似文献
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《International Journal of Digital Earth》2013,6(10):1030-1054
ABSTRACTRecent research has shown an increase in the number of extreme tornado outbreaks per year. The characterization of the spatio-temporal pattern of tornado events is therefore a critical task in the analysis of meteorological data. Currently, there are a large number of available meteorological datasets that can be used for such analysis. However, much of these data are distributed across multiple websites and are not accessible in a central location. This poses a significant challenge for a scientist who is interested in exploring meteorological patterns associated with tornado events. This paper presents a novel system which uses cloud-based technology for integrating, storing, exploring, analyzing, and visualizing meteorological data associated with tornado outbreaks. The system employs a novel NoSQL database schema and web services architecture for data integration and provides a user friendly interface that allows scientists to explore the spatio-temporal pattern of tornado events. Furthermore, scientists can use this interface to analyze the relationship between different meteorological variables and properties of tornado outbreaks using a number of spatio-temporal statistical and data mining methods. The efficacy of the system is demonstrated on a use case centered on the analysis of climatic indicators of large spatio-temporally clustered tornado outbreaks. 相似文献
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Arc_Mat: a Matlab-based spatial data analysis toolbox 总被引：2，自引：2，他引：0
This article presents an overview of Arc_Mat, a Matlab-based spatial data analysis software package whose source code has
been placed in the public domain. An earlier version of the Arc_Mat toolbox was developed to extract map polygon and database
information from ESRI shapefiles and provide high quality mapping in the Matlab software environment. We discuss revisions
to the toolbox that: utilize enhanced computing and graphing capabilities of more recent versions of Matlab, restructure the
toolbox with object-oriented programming features, and provide more comprehensive functions for spatial data analysis. The
Arc_Mat toolbox functionality includes basic choropleth mapping; exploratory spatial data analysis that provides exploratory
views of spatial data through various graphs, for example, histogram, Moran scatterplot, three-dimensional scatterplot, density
distribution plot, and parallel coordinate plots; and more formal spatial data modeling that draws on the extensive Spatial
Econometrics Toolbox functions. A brief review of the design aspects of the revised Arc_Mat is described, and we provide some
illustrative examples that highlight representative uses of the toolbox. Finally, we discuss programming with and customizing
the Arc_Mat toolbox functionalities. 相似文献
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Claudio Paniconi Sally Kleinfeldt Jonathan Deckmyn & Andrea Giacomelli 《Transactions in GIS》1999,3(2):97-118
Distributed hydrologic models are an integral component of spatial decision support systems for watershed management. At these basin (and larger) scales, a common problem in hydrology and other environmental sciences arises from the need to cope with the increasingly sophisticated models and software tools that are used in the management, processing, and analysis of large volumes of data collected from advanced in situ and remote monitoring instruments. The diversity of these tools, and the need for experts and non-experts alike to be able to easily use them, suggests a non-trivial integration problem of building customized systems from disparate (and in many cases proprietary) components. In this paper we address the systems integration problem within the context of a study of surface-subsurface-atmosphere interactions involving soil moisture remote sensing and hydrologic simulation. The simple early steps that were taken highlight the role of the different components and tools in the integration effort. An alternative approach is presented for creating an integrated system, based on a data flow model with the modular components linked within a flexible framework. An example is developed based on established systems integration techniques from the field of computer aided design. 相似文献
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Connected Geomatics in the big data era 总被引：1，自引：0，他引：1
The development of global informatization and its integration with industrialization symbolizes that human society has entered into the big data era. This article covers seven new characteristics of Geomatics (i.e. ubiquitous sensor, multi-dimensional dynamics, integration via networking, full automation in real time, from sensing to recognition, crowdsourcing and volunteered geographic information, and service-oriented science), and puts forward the corresponding critical technical challenges in the construction of integrated space–air–ground geospatial networks. Through the discussions outlined in this paper, we propose a new development stage of Geomatics entitled ‘Connected Geomatics,’ which is defined as a multi-disciplinary science and technology that uses systematic approaches and integrates methods of spatio-temporal data acquisition, information extraction, network management, knowledge discovery, and spatial sensing and recognition, as well as intelligent location-based services pertaining to any physical objects and human activities on the earth. It is envisioned that the advancement of Geomatics will make a great contribution to human sustainable development. 相似文献
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蝗虫防治工作的关键在于及时准确地获取蝗情信息。本文在总结目前蝗虫防治辅助信息获取过程中及时性与共享率方面不足的基础上,综合考虑蝗情查询的实际需求提出将蝗虫防治工作与WebGIS技术结合,以Geoserver 2.11发布地理信息网络服务,结合数据库管理软件SQL Server 2005、空间数据引擎ArcSDE 9.3、网络服务器IISA 6.0、NI_Map地图服务应用程序接口设计开发蝗虫防治辅助信息查询系统,综合利用Web技术的跨平台与互操作特性以及GIS技术对空间数据的组织管理功能为蝗虫防治提供良好的数据管理与信息支持平台,增强蝗虫防治辅助信息获取的及时性、应用范围以及共享率。系统采用BS＋CS混合模式,实现了全国范围内蝗情采集数据的信息化管理,大比例尺地图参照下的蝗虫防治辅助信息可视化查询,以及不同类型空间数据的快速更新。 相似文献
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Providing land cover spatio-temporal information and geo-computing through web service is a new challenge for supporting global change research, earth system simulation and many other societal benefit areas. This requires an integrated knowledge representation and web implementation of static land cover and change information, as well as the related operations for geo-computing. The temporal logic relations among land cover snapshots and increments were examined with a matrix-based three-step analysis. Twelve temporal logic relations were identified and five basic spatial operations were formalized with set operators, which were all used to develop algorithms for deriving implicit change information. A knowledge representation for land cover change information was then developed based on these temporal logic and operation relations. A prototype web-service system was further implemented based on OWL-DL. Both online access and conversion of land cover spatio-temporal information can be facilitated with such a web service system. 相似文献
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基于元数据面向电子政务的空间信息共享 总被引：4，自引：1，他引：3
近几年随着我国电子政务系统的不断建设,资源共享已经成为一个十分迫切的问题。本文探讨电子政务建设中的空间信息共享问题。结合当前电子政务建设中空间信息的应用现状,提出在电子政务建设中数据共享特别是空间信息共享的解决方法,及基于电子政务中的空间元数据标准和数据共享安全机制,采用分布式结构实现政府各部门之间的针对电子政务应用的空间信息共享。 相似文献
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熊庆文 《武汉大学学报(信息科学版)》2004,29(2):111-115
讨论了一个面向工作流的项目管理系统中 ,各类计划、实施、监督管理、汇总报表等结构化文档及非结构化文档的存储访问系统的构造方法 ,并设计与实现了一个数字化测绘生产管理系统实例 相似文献
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就一体化测绘技术在基础地理信息数据更新中的应用情况进行了较为全面的分析,简要回顾了一体化测绘技术在数字测绘技术体系建设中的发展过程,分析了内外业一体化与采编一体化和图库一体化技术之间的关系,讨论了内外业一体化技术的变迁,分析了航测采编一体化、图库一体化和集群分布式并行计算等技术在基础地理信息数据更新中的作用。 相似文献
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采用.NET和ARCGIS Engine开发完成的台风遥感监测分析系统,通过对FY2C、NOAA、FY3A等不同卫星遥感数据,以及雷达数据、空间地理数据和各种专题数据进行读取处理,能够实现台风定位、定强、结构诊断、路径分析、降水估计等专项分析功能以及图像处理、地理导航、专题制图、数值预报等辅助分析功能,为台风的监测和预报提供了一体化的信息支撑,是国内率先实现台风遥感监测分析数据综合和功能综合的平台系统。本文重点介绍了系统开发中所采用的基于面向对象的台风遥感综合应用系统框架分析设计、数据库设计与组织、模型集成等系统实现关键技术。 相似文献
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基于Web的上海市地理信息元数据查询系统开发 总被引：2，自引：0，他引：2
地理信息元数据查询系统是空间数据交换中心的重要组成部分。基于Web的上海市地理信息元数据查询系统的开发,使得用户可以方便准确地查询相关的地理元数据,系统利用JSP／JavaBean技术生成动态网页;利用JDBC技术连接数据库;采用Tomeat作为JSP容器,Apache作为HTTP服务器。论文对相关技术和开发过程进行了介绍。 相似文献
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福建省生态环境综合系列图编制 总被引：1，自引：0，他引：1
福建省生态环境综合系列图是数字福建应用项目《福建省生态环境动态监测与管理系统》中数据库建设的一个重要基础工作,包括生态环境类型图、生态环境评价图、生态功能区划图以及地势图、地貌图、土壤图、植被图、土地利用图等。编制工作是在参考各种图件和文字等资料基础上,以遥感(LandSatETM)为主要信息源,根据影像特征的差异勾绘生态环境单元并记录各单元一系列相关信息,根据单元图属性派生其它图(地势图除外)。编制过程中着重解决了各专题图的分类系统和编码系统、多源信息复合、遥感综合系列制图与地图演绎法结合应用、3S技术的综合应用、多种制图技术的综合应用等问题。 相似文献
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针对不动产统一登记平台建设问题,该文以江西省,不动产登记平台建设为例从多源不动产登记信息数据的整合、不动产统一登记平台设计与实现两个方面开展。对土地、房产、草原、林地、海域等多行业的数据进行整理、整合,形成统一的不动产登记数据库。平台总体框架由基础保障系统、不动产历史数据库、共享服务平台、数据管理平台、政务基础平台、登记信息管理平台、登记信息公示平台7部分组成。 相似文献
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如何根据智慧城市运行管理、建设规划和应急指挥等政府决策部门的综合需求,实现分散信息资源的统一集成、复杂模型资源的有效调用和决策时空信息的高效共享与可视化,成为现阶段城市综合决策的重大挑战。首先提出了感知联网与时空信息接入、地理空间模型联网与认知、决策时空信息聚焦服务等智慧城市时空信息综合决策共性关键技术,突破了城市时空信息智能分析、协同决策与主动聚焦服务的瓶颈;其次,设计并实现了智慧城市时空信息综合决策原型系统,并以太原市燃气泄漏应急响应为例,验证了系统辅助城市综合决策的可行性和适用性;最后,概括了城市（群）立体感知网、城市（群）模型网和城市（群）时空大数据3大主要发展趋势。 相似文献
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基于GIS的北京旅游信息系统的设计与开发 总被引：13，自引：0，他引：13
从数据库的设计、功能模块的设计等方面介绍了基于GIS的北京旅游信息系统设计与实现流程。系统数据库以SQL Servers2000进行管理,在VB环境下开发前端应用平台,利用ADO动态数据连接引擎实现数据通信：利用MapObjects组件技术,采用嵌入式集成方式,实现旅游查询、旅游规划等专业应用与基本地理信息功能的有机集成。 相似文献
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