A Novel Network Service Mode of Geospatial Information and its Prototype System

2010 ◽  
Vol 108-111 ◽  
pp. 319-323
Author(s):  
Gen Yuan Du ◽  
Fang Miao ◽  
Xi Rong Guo
Keyword(s):  
Access Network ◽  
Remote Sensing Data ◽  
Geospatial Data ◽  
Information Network ◽  
Prototype System ◽  
Network Service ◽  
Geospatial Information ◽  
Digital Earth ◽  
Application Service ◽  
Tourism Service

This paper proposes a novel digital earth platform framework, which is a application, service and decision-making support systems of geospatial data acquisition, storage, transmission, conversion, processing, analysis, retrieval, expression and output as a unified body, the core of which is to deal with geospatial data for spatial geographic information network service Geo-Browser/Geospatial Information Server (G/S) mode and Hyper Geographic Markup Language (HGML). Depth understanding and analysis of platform architecture, this paper realizes of digital earth platform prototype – U-Star based on the geospatial information network service G/S mode, the platform has the merits of C/S mode that full use of client resources, efficient to deal with the client data, as well as the advantages of B/S mode that the unified client and convenient to access network. This platform is a new server which can cope with massive geospatial information and a solution which can provide efficient service. It has already been applied into many fields, such as the digital tourism service system, the time sequence analysis of Wenchuan Earthquake, the real-time video monitoring based on the digital earth platform and the intelligent processing and exhibition of remote sensing data. The result indicates that the perfection of space, time and complexion of the geospatial information network accessing will effectively improve the quality and efficiency of the shared data, which has very important theoretical significance and bright prospect of application.

scholarly journals Geospatial Information Processing Technologies

2019 ◽  
pp. 191-227
Author(s):  
Zhenlong Li ◽  
Zhipeng Gui ◽  
Barbara Hofer ◽  
Yan Li ◽  
Simon Scheider ◽  
...  
Keyword(s):  
Information Processing ◽  
High Performance ◽  
Scientific Discovery ◽  
Geospatial Data ◽  
Geospatial Information ◽  
Processing Technologies ◽  
Digital Earth ◽  
Wide Range ◽  
Efficient Processing ◽  
Key Techniques

Abstract The increasing availability of geospatial data offers great opportunities for advancing scientific discovery and practices in society. Effective and efficient processing of geospatial data is essential for a wide range of Digital Earth applications such as climate change, natural hazard prediction and mitigation, and public health. However, the massive volume, heterogeneous, and distributed nature of global geospatial data pose challenges in geospatial information processing and computing. This chapter introduces three technologies for geospatial data processing: high-performance computing, online geoprocessing, and distributed geoprocessing, with each technology addressing one aspect of the challenges. The fundamental concepts, principles, and key techniques of the three technologies are elaborated in detail, followed by examples of applications and research directions in the context of Digital Earth. Lastly, a Digital Earth reference framework called discrete global grid system (DGGS) is discussed.

scholarly journals Geo-DMP: A DTN-Based Mobile Prototype for Geospatial Data Retrieval

2019 ◽  
Vol 9 (1) ◽  
pp. 8
Author(s):  
Chao Li ◽  
Huimei Lu ◽  
Yong Xiang ◽  
Rui Gao
Keyword(s):  
Virtual Machines ◽  
Data Retrieval ◽  
Geospatial Data ◽  
Prototype System ◽  
Multiple Sources ◽  
Geospatial Information ◽  
Network Resource ◽  
Map Segmentation ◽  
Disruption Tolerant Network ◽  
History Of

Geospatial information is gaining immense interest and importance as we enter the era of highly developed transportation and communication. Despite the proliferation of cellular network and WiFi, on some occasions, users still face barriers to accessing geospatial data. In this paper, we design and implement a distributed prototype system with a delay/disruption tolerant network (DTN), named Geo-DMP, for cooperatively and opportunistically sharing and exchanging named geospatial contents in a device-to-device fashion. First of all, we construct a lightweight “content agent” module to bridge the gap between the application layer and the underlying DTN protocol stack. Afterwards, to profile the mobility history of users in practical geospatial environments, we present a map segmentation scheme based on road network and administrative subdivision information. Subsequently, we associate the regional movement history information with the content retrieval process to devise a hierarchical and region-oriented DTN routing scheme for both requests and responses. Finally, we conduct extensive experiments with real-world trajectories and complete implementations on the emulation platform composed of virtual machines. The experiments corroborate that Geo-DMP has the capability of successfully retrieving geospatial contents for users for most of the time under mobile circumstances with episodic connectivity. Moreover, en-route caches can be efficiently exploited to provision contents from multiple sources with less network resource consumption and shorter user-perceived latencies.

scholarly journals DDNB—Doubly Decentralized Network Blockchain Architecture for Application Services

2020 ◽  
Vol 10 (15) ◽  
pp. 5212
Author(s):  
Youhwan Seol ◽  
Jaehong Ahn ◽  
Sehyun Park ◽  
Mookeun Ji ◽  
Heungseok Chae ◽  
...  
Keyword(s):  
Processing Speed ◽  
Prototype System ◽  
Proof Of Concept ◽  
Service Platform ◽  
Blockchain Technology ◽  
Platform Architecture ◽  
Application Service ◽  
Verification Process ◽  
Application Developers

Decentralization and immutability characteristics of blockchain technology has attracted numerous blockchain-based systems and applications to be proposed. However, technical shortcomings such as low transaction speed, complexity, scalability, and vulnerability to certain attacks have been identified, making it challenging to use the technology on general consumer applications and services. To address the problem, we propose a new application service platform architecture called DDNB (Doubly Decentralized Network Blockchain). DDNB divides the system into multiple layers in order to take advantage of permissioned blockchain for its processing speed and security, while allowing permissionless open use of the system to application developers. To allow any node to freely participate in application services, DDNB adopts a novel periodic node self-verification process and query chaining mechanism to authenticate newly joining nodes and validate transactions effectively and efficiently. The proposed architecture is evaluated in terms of its processing speed and security on a real proof-of-concept prototype system.

scholarly journals A Webgis Framework for Disseminating Processed Remotely Sensed on Land Cover Transformations

2016 ◽  
Vol 100 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Grazia Caradonna ◽  
Antonio Novelli ◽  
Eufemia Tarantino ◽  
Raffaela Cefalo ◽  
Umberto Fratino
Keyword(s):  
Land Cover ◽  
Satellite Data ◽  
Vegetation Indices ◽  
Remote Sensing Data ◽  
Geospatial Data ◽  
Usage Patterns ◽  
Mediterranean Regions ◽  
Multi Temporal ◽  
Using Data ◽  
Set Up

Abstract Mediterranean regions have experienced significant soil degradation over the past decades. In this context, careful land observation using satellite data is crucial for understanding the long-term usage patterns of natural resources and facilitating their sustainable management to monitor and evaluate the potential degradation. Given the environmental and political interest on this problem, there is urgent need for a centralized repository and mechanism to share geospatial data, information and maps of land change. Geospatial data collecting is one of the most important task for many users because there are significant barriers in accessing and using data. This limit could be overcome by implementing a WebGIS through a combination of existing free and open source software for geographic information systems (FOSS4G). In this paper we preliminary discuss methods for collecting raster data in a geodatabase by processing open multi-temporal and multi-scale satellite data aimed at retrieving indicators for land degradation phenomenon (i.e. land cover/land use analysis, vegetation indices, trend analysis, etc.). Then we describe a methodology for designing a WebGIS framework in order to disseminate information through maps for territory monitoring. Basic WebGIS functions were extended with the help of POSTGIS database and OpenLayers libraries. Geoserver was customized to set up and enhance the website functions developing various advanced queries using PostgreSQL and innovative tools to carry out efficiently multi-layer overlay analysis. The end-product is a simple system that provides the opportunity not only to consult interactively but also download processed remote sensing data.

Geospatial Resource Integration in Support of Homeland Defense and Security

2019 ◽  
pp. 342-352
Author(s):  
David Foster ◽  
Christopher Mayfield
Keyword(s):  
Local Governments ◽  
Common Ground ◽  
Geospatial Data ◽  
Federal State ◽  
September 11Th ◽  
Geospatial Information ◽  
Government Organizations ◽  
Federal Response ◽  
Homeland Defense ◽  
The U.S

The U.S. Department of Defense (DoD) has faced numerous challenges within the realm of Geospatial Information Systems and Science in fostering a Common Operational Picture suitable to homeland defense and security. This paper details the challenges and successes since September 11th, 2001 to build common ground for all federal, state, local governments, and non-government organizations that depend on geospatial data to provide for the safety and security of the Nation. An analysis of the protracted integration of commercial GIS technologies within the DoD and the speed, openness, and scale this expertise can bring is discussed as an issue for the Federal response to disasters. Finally, distinct successes of collaboration and integration of common standards and data currently in use at military commands is discussed as a robust path to improve future geospatial efforts.

Research and Design of Geospatial Metadata Deployment Prototype System Based on PHP Framework

2016 ◽  
pp. 477-484
Author(s):  
Li Zhang
Keyword(s):  
Public Service ◽  
Data Center ◽  
Management System ◽  
Content Management ◽  
Geographic Information ◽  
Geospatial Data ◽  
Prototype System ◽  
Content Management System ◽  
Geospatial Metadata ◽  
Research And Design

As a public service platform of geographic information, National Geospatial Data Center (NGDC) can provide geospatial metadata services for data producers and data users. This paper firstly analyzes the problems in the development and maintenance of geospatial metadata deployment system. Then it describes and analyzes the characteristics of PHP framework and the advantages of developing content management system (CMS) with it. Finally, how to design geospatial metadata deployment system based on PHP framework is discussed in this paper.

The Geospatial Semantic Web

2011 ◽  
pp. 588-609 ◽  
Author(s):  
Rafael Moreno-Sanchez
Keyword(s):  
Semantic Web ◽  
Research And Development ◽  
Computer Science ◽  
Geospatial Data ◽  
Future Research ◽  
Science Students ◽  
Geospatial Information ◽  
Information Professionals ◽  
The Web ◽  
The Way

The Semantic Web (SW) and Geospatial Semantic Web (GSW) are considered the next step in the evolution of the Web. For most non-Web specialists, geospatial information professionals, and non-computer-science students these concepts and their impacts on the way we use the Web are not clearly understood. The purpose of this chapter is to provide this broad audience of non-specialists with a basic understanding of: the needs and visions driving the evolution toward the SW and GSW; the principles and technologies involved in their implementation; the state of the art in the efforts to create the GSW; the impacts of the GSW on the way we use the Web to discover, evaluate, and integrate geospatial data and services; and the needs for future research and development to make the GSW a reality. A background on the SW is first presented to serve as a basis for more specific discussions on the GSW.

scholarly journals Web GIS for Airport Emergency Response - UML Model

2015 ◽  
Vol 27 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Martina Baučić ◽  
Damir Medak
Keyword(s):  
Emergency Response ◽  
Information Needs ◽  
Geospatial Data ◽  
Web Gis ◽  
Geospatial Information ◽  
Great Expectations ◽  
Gis Application ◽  
Fire Brigade ◽  
Common Understanding

The main objective of integrating Web GIS in airport emergency response should be to provide the most appropriate geospatial information to all participants. Airport emergency response still needs a model that will explain its complexity: its participants, their tasks and information needs. This paper presents the UML model of airport emergency response. Such a model facilitates a common understanding of the system by participants coming from airport, police, fire brigade, etc. It also enables institutional agreements for sharing data. The developers have got specifications of geospatial data and GIS functions imposed by participants and standards. A prototype Web GIS application is developed and presented to the users for evaluation. The prototype has shown how GIS functions can improve airport emergency response. The users have shown great interest, and they have great expectations in further integration of Web GIS in airport emergency response.

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