Spatial Data Management Research Articles

Integrated Management and Visualization of Spatial Data Based on Oracle Spatial Database with MapViewer

Integrated Management and Visualization of Spatial Data Based on Oracle Spatial Database with MapViewer

The multi-source spatial data management system based on geological information metadata standard

Based on analyzing the characteristics of spatial data in combination with current spatial data storage technology,this study implements the organization and management of multi-source spatial data and builds the Multi-source Spatial Data Management System.For implementing the system,this study solves the problems of spatial data thematic diversity and data exchange by extending the metadata standards,solves the issues like large amounts of data,distributed source and heterogeneous data format using single machine multiple SDE data storage technology,and finally,in order to solve the problem of fast retrieval localization of spatial data,systematically builds the spatial index database based on single machine multiple SDE.The system lays a good foundation for solving thematic diversity,data sharing and exchange which will be met in the information platform construction of multi-source spatial data for the applications of resource and environmental remote sensing data.

Storage and Management of Open - pit Transportation Path

This paper is aiming at the actual demand of open-pit mine daily production scheduling and positioning monitoring. After extracting data from existing topographic maps and other information, it discusses the feasibility of using this data to establish thematic database. By considering the extensive application of GPS data, utilizing new spatial data types of SQL Server 2008 for data storage and management. Extracting data algorithms such as the node spatial data, the regional boundary and the path are implemented, then spatial data storage and management is also realized. It provides the basis for the production of decision-making and production cost savings.

Research on the Consequence Assessment System of Natural Gas Pipeline Leakage Accidents

With the rapid oil and gas industry development, the city gas pipeline has become a necessary infrastructure of the modern city. The Pipe leakage emergency rescue often involving multiple people and departments at all levels, also a large number of geographical space data for piping around. The Geographic Information System (GIS) has many advantages that it can conduct spatial data management, data visualization, analysis, simulation, and integrating with other systems. The main study line is simulating the gas diffusion, firing and exposing, once leaking, researching to the establishment of accident prevention, reducing damage caused by an accident emergency rescue system of city natural gas pipeline. The system can make a visual show of the assessment area of accident consequence with different grades through inputting physical and chemical parameters of natural gas, initial state of gas leakage and weather conditions.

APPLICATION OF GIS IN REGIONAL ECOLOGICAL RISK ASSESSMENT OF WATER RESOURCES

The regional ecological risk assessment of water resources has spatial, nonlinear and stochastic characteristics. GIS technology can handle large volumes of spatial information, conduct spatial analysis and spatial data management operations. It visually displays the distribution trend of environmental factors and the relationship between topology and regional water ecological risk pattern. This paper presents the five stages of the application of GIS in the regional ecological assessment of water resources and establishes a GIS water environmental risk information database. A hierarchy water resources risk assessment index system has been set up using the AHP method. The composite index method is used to estimate the size of ecological risk. The water risk value is divided into five levels which are the low-risk areas, lower-risk areas, medium-risk areas, higher risk areas and high-risk areas, respectively. For example, through the spherical model fitting and assembly analysis of GIS, the variations and divisions of water risk and their influencing factors in the Shaanxi Province, China, can be better described and analyzed. Therefore, GIS can be employed as a better tool to reflect the spatial distribution of water environmental quality. Accordingly, it can be used to quantitatively study the water resource risk, and to reflect the spatial variation of the water resource risk. Moreover, early warning of water resources utilization can be given, thus providing a basis to improve and enhance the water resources risk management and scientific decision-making.

The Role of the Integrated Management of Spatial Data in Urban Management

The importance of spatial data infrastructure for urban management, basic data element mesh data, component data, geocoding data statistics, the final data integration, sharing and analysis to improve access to digital data, and promote the standards of the urban management approach to enhance the urban management of spatial data analysis to provide a reference for future urban management.

Data management on the spatial web

Due in part to the increasing mobile use of the web and the proliferation of geo-positioning, the web is fast acquiring a significant spatial aspect. Content and users are being augmented with locations that are used increasingly by location-based services. Studies suggest that each week, several billion web queries are issued that have local intent and target spatial web objects. These are points of interest with a web presence, and they thus have locations as well as textual descriptions. This development has given prominence to spatial web data management, an area ripe with new and exciting opportunities and challenges. The research community has embarked on inventing and supporting new query functionality for the spatial web. Different kinds of spatial web queries return objects that are near a location argument and are relevant to a text argument. To support such queries, it is important to be able to rank objects according to their relevance to a query. And it is important to be able to process the queries with low latency. The talk offers an overview of key aspects of the spatial web. Based on recent results obtained by the speaker and his colleagues, the talk explores new query functionality enabled by the setting. Further, the talk offers insight into the data management techniques capable of supporting such functionality.

THE IRANIAN NATIONAL GEODATA REVISION STRATEGY AND REALIZATION BASED ON GEODATABASE

Abstract. In recent years, using of spatial database for storing and managing spatial data has become a hot topic in the field of GIS. Accordingly National Cartographic Center of Iran (NCC) produces – from time to time – some spatial data which is usually included in some databases. One of the NCC major projects was designing National Topographic Database (NTDB). NCC decided to create National Topographic Database of the entire country-based on 1:25000 coverage maps. The standard of NTDB was published in 1994 and its database was created at the same time. In NTDB geometric data was stored in MicroStation design format (DGN) which each feature has a link to its attribute data (stored in Microsoft Access file). Also NTDB file was produced in a sheet-wise mode and then stored in a file-based style. Besides map compilation, revision of existing maps has already been started. Key problems of NCC are revision strategy, NTDB file-based style storage and operator challenges (NCC operators are almost preferred to edit and revise geometry data in CAD environments). A GeoDatabase solution for national Geodata, based on NTDB map files and operators' revision preferences, is introduced and released herein. The proposed solution extends the traditional methods to have a seamless spatial database which it can be revised in CAD and GIS environment, simultaneously. The proposed system is the common data framework to create a central data repository for spatial data storage and management.

IMPLEMENTATION OF AN AGRICULTURAL ENVIRONMENTAL INFORMATION SYSTEM (AEIS) FOR THE SANJIANG PLAIN, NE-CHINA

Abstract. The Sino-German Project between the China Agricultural University and the University of Cologne, Germany, focuses on regional agro-ecosystem modelling. One major focus of the cooperation activity is the establishment of joint rice field experiment research in Jiansanjiang, located in the Sanjiang Plain (Heilongjiang Province, north-eastern part of China), to investigate the different agricultural practices and their impact on yield and environment. An additional task is to set-up an Agricultural Environmental Information System (AEIS) for the Sanjiang Plain (SJP), which covers more than 100 000 km2. Research groups from Geography (e.g. GIS & Remote Sensing) and Plant Nutrition (e.g. Precision Agriculture) are involved in the project. The major aim of the AEIS for the SJP is to provide information about (i) agriculture in the region, (ii) the impact of agricultural practices on the environment, and (iii) simulation scenarios for sustainable strategies. Consequently, the AEIS for the SJP provides information for decision support and therefore could be regarded as a Spatial Decision Support System (SDSS), too. The investigation of agricultural and environmental issues has a spatial context, which requires the management, handling, and analysis of spatial data. The use of GIS enables the capture, storage, analysis and presentation of spatial data. Therefore, GIS is the major tool for the set-up of the AEIS for the SJP. This contribution presents the results of linking agricultural statistics with GIS to provide information about agriculture in the SJP and discusses the benefits of this method as well as the integration of methods to produce new data.

Applying GIS tools to define prehistoric megalith transport route corridors: Olmec megalith transport routes: a case study

Applying spatial data management and analytical tools is an accepted method for investigating potential settlement patterns. This study applied Geographic Information System (GIS) technology to the study of Preclassic Olmec megalith transport in Mesoamerica. The GIS slope gradient tool was used to identify potential transport corridors with gradients of less that 1:10, which defines the limit of human effort needed to control these stones as demonstrated in ethnographic and replication experiments by various researchers. These outcomes were also used to refine transportation methods and likely start points that would be used to cross lowlands near to the San Lorenzo centre of Olmec society.

Cosine-Based Clustering Algorithm Approach

Due to many applications need the management of spatial data; clustering large spatial databases is an important problem which tries to find the densely populated regions in the feature space to be used in data mining, knowledge discovery, or efficient information retrieval. A good clustering approach should be efficient and detect clusters of arbitrary shapes. It must be insensitive to the outliers (noise) and the order of input data. In this paper Cosine Cluster is proposed based on cosine transformation, which satisfies all the above requirements. Using multi-resolution property of cosine transforms, arbitrary shape clusters can be effectively identified at different degrees of accuracy. Cosine Cluster is also approved to be highly efficient in terms of time complexity. Experimental results on very large data sets are presented, which show the efficiency and effectiveness of the proposed approach compared to other recent clustering methods.

Spatio-temporal assessment of food safety risks in Canadian food distribution systems using GIS

While the value of geographic information systems (GIS) is widely applied in public health there have been comparatively few examples of applications that extend to the assessment of risks in food distribution systems. GIS can provide decision makers with strong computing platforms for spatial data management, integration, analysis, querying and visualization. The present report addresses some spatio-analyses in a complex food distribution system and defines influence areas as travel time zones generated through road network analysis on a national scale rather than on a community scale. In addition, a dynamic risk index is defined to translate a contamination event into a public health risk as time progresses. More specifically, in this research, GIS is used to map the Canadian produce distribution system, analyze accessibility to contaminated product by consumers, and estimate the level of risk associated with a contamination event over time, as illustrated in a scenario.

Preliminary Research on Distributed Cluster Monitoring of G/S Model

In the G/S model, the distributed server cluster is responsible for providing spatial data management and information sharing. Monitoring is the main task of cluster management. This paper studied the implementation of current cluster monitoring systems and on this basis proposed solutions of G/S cluster monitoring, mainly make a new exploration on the storage of monitoring data – the monitoring information is stored in HGML files, and around the storage model achieved other functions the monitoring system needed, finally the prototype system was developed and the strategy was verified.

Multi-mode Ensemble Visualization Demo System for Space Weather

空间天气模式集成是空间天气预报业务化的基础, 空间天气模式集成可视化演示软件系统是其中重要的研究内容之一. 空间天气模式种类繁多, 要素多样, 模型复杂, 且各模式可视化形式及方法具有差异性. 本文综合当前中国空间天气模式的特点, 构建了一套空间天气模式集成可视化演示系统. 该系统兼容性好、可扩展性高, 能够集成当前中国空间天气中大多数模式. 讨论了空间数据管理方法, 基于Visual C++ 软件平台和OpenGL可视化软件模块,以动态加载方式初步实现了多个空间天气模式的可视化集成.

System Integration of Digital Real Estate-Management Based on Service

An architecture design of digital real estate-management based on service is provided based on the analysis current situation of estate-management in our country to solve the problems about system integrations between sub systems of estate-management. The policy of integration is the key point, which includes the interactive between mixed demission of house spatial data surveying & mapping, the interactive between house spatial data surveying & mapping and house property data management, the interactive between public application and Special application. An example finally is specifically developed based on the design. The study of system integration of digital real estate-management, especially taking the public application into the system design and multi demission of house spatial data management shows a revolutionary significance to the informatization of real estate-management in our country at present.

Study on Desertification Monitoring System Based on RemoteSensing,GIS and GPS

Wuwei lies in the temperate zone with typical desertified climate, which land types have sandy in oasis margins, saline and alkaline in downriver district and grassland degradation at mid and low mountains. Remote sensing, GIS and GPS were used to design desertification monitoring system in Wuwei. The system takes vector data as major data resources to construct management system of desertified spatial data, which meets the demand for mid and large scale desertified dynamic monitoring. The system includes data collecting and inputting, remote sensing processing and classification maps, spatial data management and result outputting. At last, this paper provides the methods for determining desertification and types, desertified information extraction from remote sensing images, desertification assessment of sloping cultivated land based on DEM.

Spatial data management priorities for assessment of Europe’s coasts and seas

Systemic understanding of marine and coastal environment needs data integration following a respective concept e.g. multi-dimensional and functional mapping. A number of new activities will improve data supply for coasts and seas. This data needs to be integrated and combined with socio-economic drivers and resulting pressures. Resulting knowledge base should be able to inform effectively ecosystem-based management actions, such as integrated coastal zone management, maritime spatial planning, extension of Natura 2000 areas or climate change adaptation in coastal regions and maritime sectors. Assessment that aims to inform such processes will require rethinking of priorities for spatial data collection and analysis, in particular building on data sharing and standardization, improved spatial data integration, promoting interoperability of relevant information systems and possibility of assimilating different data types in to models. Different aspects of spatial data should be addressed in coherent implementation of spatial data infrastructure.

SPATIAL MODELS FOR ARCHITECTURAL HERITAGE IN URBAN DATABASE CONTEXT

Abstract. Despite the GIS (Geographic Information Systems/Geospatial Information Systems) have been provided with several applications to manage the two-dimensional geometric information and arrange the topological relations among different spatial primitives, most of these systems have limited capabilities to manage the three-dimensional space. Other tools, such as CAD systems, have already achieved a full capability of representing 3D data. Most of the researches in the field of GIS have underlined the necessity of a full 3D management capability which is not yet achieved by the available systems (Rahman, Pilouk 2008) (Zlatanova 2002). First of all to reach this goal is important to define the spatial data model, which is at the same time a geometric and topological model and so integrating these two aspects in relation to the database management efficiency and documentation purposes. The application field on which these model can be tested is the spatial data managing of Architectural Heritage documentation, to evaluate the pertinence of these spatial models to the requested scale for the needs of such a documentation. Most of the important aspects are the integration of metric data originated from different sources and the representation and management of multiscale data. The issues connected with the representation of objects at higher LOD than the ones defined by the CityGML will be taken into account. The aim of this paper is then to investigate which are the favorable application of a framework in order to integrate two different approaches: architectural heritage spatial documentation and urban scale spatial data management.

EuroSDR And Its Role In Developing Links Between Science And National Mapping

AbstractThis paper describes the process of transfer of technology from research to its employment by national mapping agencies. Starting with the activities in photogrammetry of OEEPE it leads on to the current wider remit of EuroSDR in spatial data provision, management and delivery. It also reflects on current research challenges in imagery from an information management perspective and summarises the contribution to OEEPE/EuroSDR of Professor Ian Dowman.

The Design and Research of the Information Management System of Geological Hazards in China Coastal Zone based on ArcEngine

The study was based on the development platform of Visual Basic 6.0.The secondary development of GIS was progressed by ArcEngine 9.3 component library of ESRI,analyzing the actual demand of geological hazards information management in China coastal zone.The information management system of geological hazards in China coastal zone was established.The system had the functions including the query and management of spatial data and attribute data,space statistical analysis,thematic maps drawing and hazard assessment,data conversion and output,etc.It provided the integrated services for geologic hazard prediction,forecast and prevention.