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The rail transit projects have played a very important role in the urban transport and it's construction safety are concerned more and more. Subway construction monitoring can directly reflect the impact for the surrounding environment and buildings which from the subway construction and has great significance for construction safety of subway projects. This paper focuses on the new methods and techniques...
Tile caching technology can significantly improve the efficiency of WebGIS systems. However, the current tile caching only works well on data that is never or seldom updated. Hence, traditional tile caching could not be applied to editable WebGIS. This paper proposes a dynamic tile caching method (D-TileCaching), by which tile caches can be updated in real time and thus are applicable for editable...
Location estimation of sensor nodes is an essential part of most applications for wireless sensor and actor networks (WSAN). The ambiguous location information often makes the collected data useless in these applications. Environmental monitoring in particular, relies on an accurate position estimation in order to process or evaluate the collected data. In this paper, we present a novel and scalable...
This paper describes a proposed methodology how a GIS-based security middleware solution can be enhanced by rule-based behavior analyses of the complex dynamic processes which are associated with emergency response. The results of the field tests of indoor positioning, when a wireless mobile node was moving around a testing environment in time, are presented here. The behavior of mobile node was monitored...
This paper introduces performance monitoring for spatial information system that is a part of software test tools of spatial information system. This performance monitoring uses SSH protocol and WMI to connect servers and gets the servers performances.
For new installations of 500-kV gas insulated switchgear (GIS) at the Pin Hook, TN USA 500-kV Substation and the Maury, TN USA 500-kV Substation, the Tennessee Valley Authority (TVA) chose to install an advanced SF6 gas monitoring system (GMS). This paper will discuss specifics of the GMS and how its use simplifies identification of leaking sections, facilitates planned outages for repair or replacement,...
E-learning platform for education on River Information Services (RIS) development in Republic of Croatia and Italy is presented in this paper. This platform is a result of one year research activities based on analysis of demand for education in this field. E-learning platform aims to become a system that tracks, launches and provides the interface between the user and learning objects. The uniqueness...
The Interactive Graphical Ocean Database System (IGODS) is a complete software solution to support studies of ocean, coastal, and inland waters using profiling instrumentation such as a conductivity-temperature-depth (CTD) instrument. If you routinely conduct surveys where you are profiling at a set of geographic locations, collecting CTD profiles, and perhaps also collecting water samples for additional...
While there have been many advances in intelligent monitoring, it is still difficult to understand complex environments without human assistance. Rather than focus on fully automated monitoring, this work advocates user-centered analysis. A standardized analysis environment for visual fusion and embedding of information is developed called CANVAS (Contextual Activity Notification Visualization Analysis...
This paper presents a real time tracking system that provides accurate localizations of the tracked vehicle with low cost. The system is implemented using GM862 cellular quad band module. A monitoring server and a graphical user interface on a website have also been implemented using Microsoft SQL Server 2003 and ASP.net to view the current location of a vehicle on a specific map. The system provides...
Development and environmental protection constitute an organic whole. In China, it is in the stage of rapid development of society, China is faced with many environmental problems, improving the level of the ecological environment monitoring and management is particularly important. Because of the technical limitations of the traditional environmental monitoring and management, it can not adapt to...
Forestry informatization is a significant symbol of forestry modernization. After the emergency of GIS, it accelerated the development of forestry informatization by provided strong technology support. Mobile GIS is a branch of GIS. It bases on embedded GIS and integrates with a series of cutting-edge science and technology such as advanced GPS, wireless communication technology, mobile database technology...
Hyphantria cunea is one of the harmful international plant quarantine pests. In order to monitor and control the increasingly serious situation, based on the materials and data collected by “the 221 project” in Beijing in recent three years, this paper studies the spatial decision-making system of hyphantria prevention and control simulation, by combining WebGIS, JSP and Ajax technology. We design...
With the quick expansion of urban area and the rapid growth of urban population, the problem of urban management has recently drawn much attention by research institutes and social organizations in recent years. It calls for a large amount of corresponding information for urban ecological and order management, and it is hard to gather, manage and process them. Therefore, this paper presents a web-based...
To meet the requirements of some intelligent vehicle monitoring system, the software integrates Global Position System (GPS), Geographic Information System (GIS) and Global System for Mobile communications (GSM) in the whole. The structure, network topology, functions, main technical features and their implementation principles of the system are introduced. Then hardware design of the vehicle terminal...
RUSLE, Revised Universal Soil Loss Equation, was used to estimate the average hydraulic erosion modulus of study area in four phases, which were 1976, 1988, 2000 and 2005 respectively. According to the classification standard of hydraulic erosion intensity, hydraulic erosion moduli were classified into different grades. Then, the hydraulic erosion of study area is evaluated dynamically. The study...
Technology to build WEB GIS has variety, but most of them are based on a common GIS platform, the architecture complex and can not be a good achievement for the power industry needs. In this paper, a new method to build Web GIS, which is based on Oracle MapViewer, is discussed. Oracle MapViewer- based Web GIS, which has simple structure, uses Oracle Spatial to manage spatial data, and provides JavaScript...
Kangding County is the important gateway to Tibet Autonomous Region, China. Recently, Kangding County, relying on its water, minerals, tourism, ecology and other advantages of resources, has developed economy, which impact on the ecological environment more apparently. In this paper, we used two LANDSAT TM and ETM data sets and some other vetor data to quantitatively estimate changes in the size of...
In order to provide scientific and rational support for disposing abrupt river environment pollution accidents, minimize to loess, it is necessary to set up rapid reaction mechanism of sudden environmental pollution. With the advancement of GIS technology, it is feasibility to develop abrupt environmental pollution emergency decision-making supporting system. In the paper, aimed at the pollution in...
With extensive use of GIS technology in the field of water resources management and river basin water environment simulation, it has unique advantage of data accurately management and expression, and integration of data operation and spatial analysis, becoming important basis for urban infrastructure planning. Pipe network extraction, DEM elevation extraction and pipe network simplification have done...
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