A catalogue service facilitates sharing, discovery, retrieval, management of, and access to large volumes of distributed geospatial resources, for example data, services, applications, and their replicas on the Internet. Grid computing provides an infrastructure for effective use of computing, storage, and other resources available online. The Open Geospatial Consortium has proposed a catalogue...

Recently, more and more geospatial data are generated and distributed with the promising data acquirement techniques like satellite imaging and digital cartography. So, it is an important issue to effectively make use of these huge geospatial data resources. This means that effective data processing technologies need to be developed to support distributed query and analysis operations onto the ...

The creation of a National Spatial Data Infrastructure (NSDI) is of growing interest in Rwanda. The importance of NSDI in facilitating access to and use of geospatial data to support decision-making is recognised. Numerous government ministries and institutions in Rwanda produce geospatial datasets of different themes. It is challenging to know what datasets exist and how to access them. Since ...

Semantic interoperability is a process to facilitate the reuse of geospatial data in a distributed and heterogeneous environment. In this process, the provided geospatial metadata that are appropriate for the intended use may be incomplete or not appropriate for data reuse. Thus, the external quality (fitness for use) of these metadata seems important for data reuse, since it has the potential ...

Geospatial data and the technologies that drive them have altered the landscape of our understanding of the world around us. The data, software and services related to geospatial information have given us the opportunity to visualize existing phenomena, to understand connections, and to address problems from environmental management to emergency response. From the everpresent Google Earth image...

This paper presents the work performed for the implementation of the geospatial product virtualization in the Grid environment. A virtual geospatial product is a product that does not exist in a geospatial data system but the system knows how to create such a product when a user requests the product. We use a two-step approach to the implementation. The first step is to represent a virtual geos...

The research agenda related to the interoperability of geospatial data is influenced by the increased accessibility of geospatial databases on the Internet, as well as their sharing and their integration. Although it is now possible to get and use geospatial data independently of their syntax and structure, it is still difficult for users to find the exact data they need as long as they do not ...

Google Earth (GE) and related open geospatial technologies have changed both the accessibility of and audience for geospatial information dramatically. Through data rich applications with easy to use interfaces, these technologies bring personalized geospatial information directly to the non-specialist. When coupled with open geospatial data standards, such as Web Map Services (WMS), Web Featur...

Geospatial information systems provide avenues to fulfill users’ quest for both absolute andrelative locations of features/objects. To achieve this, the users need to have access to different geospatialdata sets from various sources. This calls for integration of data from different geospatial sources. But,there are shortcomings as different data sets may not map exactly onto one an...

Geospatial technologies have evolved to offer users the functionality of data access and to model development to generate information. Nowadays Spatial Data Infrastructures represent the SOA paradigm in geospatial terms offering a set of interoperable distributed components to access, visualize and process data forming the Geospatial Web. Fostered by the European directive INSPIRE many public a...