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Changchun tourism information releasing system is categorized WebGIS. The system is linked by the SQL Server 2000 database management system which is based on the middleware ArcSDE, the client's browser which the system selects is the HTML browser, and the server end includs the Web server, the GIS server and the space database server. The character of this system is: the user could get the following...
Built on global geographic coordinate, Campus GIS, as a branch of GIS, becomes a spatial information model of traditional campus. With analyzing the structure model, the thought of exploitation and the functional design, we proposed one kind of architecture for Campus WebGIS based on ArcGIS Server, which includes functions of distributing, managing and severing spatial information through internet...
Integration and sharing of multi-source heterogeneous spatial data has always been the obstacle of GIS application. SQL Server spatial is a new important data source, how to integrate it into GIS platform is a problem worth studying. This study uses spatial data middleware technology to realize the seamless integration of SQL Server spatial data in MapGIS K9 platform. In this research, the data exchange...
This paper presents the use of Augmented Reality technics exploiting distributed geographical information in a mobile device using wireless network. Our system offers useful informations (number of parcel, name of the owner, agronomic structure, juridical state, and adequate plant) related to each parcel geo-referenced according to the user's position and orientation. We used inertial sensor MTi and...
Geographic location and Grid computing are two areas that have taken off in recent years, both receiving a lot of attention from research community. The Grid Resource Brokers, which tries to find the best match between the job requirements and the resources available on the Grid, can take benefits by knowing the geographic location of clients, for a considerable improvement of their decision-taking...
With the increasing of space resources on the Internet, we need a higher demand on the spatial data sharing and knowledge discovery for the heterogeneous distributed data, but the WebGIS only can provide the parts of space resources sharing. In order to solve this problem, in this paper we put forward a solution which used for the spatial data mining and knowledge discovery in the grid environment,...
With the widespread application of GIS, an increasing number of industries involved in GIS result in the appearance of multi-source heterogeneous data source. Due to the deficiencies of common methods of multi-source heterogeneous data integration, we put forward the integration of multi-source heterogeneous data based on middleware. GIS middleware integrates multiple data source driver and provides...
Geographic information systems (GIS) are now widely used. WebGIS, pushed by keeping increasing information resources, enriches functions and content of GIS under WWW framework. We propose a mobile agent-based middleware for WebGIS, called M4WebGIS, which consists of a group of coordinated agents for users to retrieve geographic information. Function logic of server part, processing logic of client...
Web feature service is an important part of geospatial data interoperability and enables GIS data with different formats to be operated at feature-level. Open Geospatial Consortium (OGC) has already developed standard implementation specifications for Web feature service, and for those Web feature services with different versions, such as WFS1.1, WFS1.0. OGC also define different schemas. Different...
Geo-spatial Web portal is regarded as one of the attractive applications from both users and providers in GIS domain. Especially, in the mashup theme using open API provided by general portal such as Google or Yahoo, Web mapping application is the top-ranked one. However, Web mapping, one component in geo-spatial Web, has been the long-term task in the GIS communities, and web mapping components for...
This paper focuses on introducing load balancing spatial analysis into XML/GML/SVG-based WebGIS. We discuss the issues of GML-based spatial data representation and analysis, and design a load balancing middleware to dispense a spatial query and analysis to the server side or the browser side based on the cost of that spatial query. Finally, this paper designs some case studies. The results of the...
Context-awareness is increasingly becoming an important capability in devices for ubiquitous computing environments. These devices use on-board sensors and history of user interaction to collect data that are used to adapt their behavior to suit with the current environment. There is a need to support real-time software in ubiquitous computing environments, especially in reactive systems, such as...
In order to use GIS spatial database better and resolve the lack of the heterogeneous data sharing which exists in traditional GIS spatial database, firstly the paper introduces the Grid and GIS spatial databases. Secondly, the paper improves the design of the middleware which integrates the grid GIS space database. On the basis of it, it has carried on the integration and the function design of grid...
As more and more mapping resources are becoming available, the Web is becoming a confluence of collaborative interactions, negotiations and planning platforms. The integration of Web services with geographic information systems (GIS) has triggered a new wave of interest for using the Web to compose dynamic mapping services for environmental planning. Web services could offer a framework for service...
The volume of ocean environmental data is extremely massive, which makes it inefficient to manage them in standard ways. This paper promotes a new method to handle this problem. It presents a non-standard method that stresses on query-oriented organization of the data. Then it describes in details of the distributed management of the data based on the new relation schema design. The method has been...
Because the advances in research technologies and the geospatial data with which they deal are diverse and complex. The OGC Web Processing Service (WPS) has several areas of complexity. Basic request-response mechanisms need to contend with delays/failures, especially for mid-term or long-term actions. The asynchronicity in communication between a user and the corresponding Web processing service,...
Geographic information systems (GIS) have become increasingly valuable tools in hydrology & hydrodynamic modeling and have been used in the evaluation of integrative development and utilization of water resource in many ways. These may relate to the coupling of hydrology & hydrodynamic models and GIS system, collaborative work of heterogenous systems and the integration of distributed spatial...
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