The Open Government Data portals (OGD), thanks to the presence of thousands geo-referenced datasets, containing spatial information are extreme interest for any analysis or process relating territory. For this happen, users must be enabled access these datasets and reuse them. An element often considered as hindering full dissemination OGD data is quality their metadata. Starting from an experi...

River discharge is an important issue to be monitored because of its significant influence on environmental systems, on human lives for water resource exploitation, and hazards related to floods and landslides. In this context, we have designed and developed a web-based Geoportal for hydrological applications that integrates geospatial processing services and web mapping viewers to provide an i...

Finding relevant geospatial information is increasingly critical because of the growing volume of geospatial data available through distributed environments. It is also a challenge for the ongoing development of the Geospatial Semantic Web. Data brokers provide searchable repositories through which users can generally retrieve the requested data. But generally, these mechanisms lack the capacit...

The heterogeneous nature of geospatial data makes the sharing of it across organizations a complex issue. As a standard means of geospatial data encoding, Geography Markup Language (GML) has been proposed by Open Geospatial Consortium (OGC), which facilitates sharing and exchange of geospatial information. With the proliferation of GML in many geospatial applications and storage support from th...

Geospatial data resources are the foundation of the construction of geo portal which is designed to provide online geoinformation services for the government, enterprise and public. It is vital to keep geospatial data fresh, accurate and comprehensive in order to satisfy the requirements of application and development of geographic location, route navigation, geo search and so on. One of the ma...

Abstract. In recent years, geospatial big data has been generated at a very high speed, and the volume is becoming increasingly massive. order to realize full potential of data, there strong requirement push embrace value open science. However, it still challenging preserve privacy integrity in sharing management. Blockchain as d distributed ledger technology series good characteristics, such d...

Traditional geospatial information platforms are built, managed and maintained by the geoinformation agencies. They integrate various geospatial data (such as DLG, DOM, DEM, gazetteers, and thematic data) to provide data analysis services for supporting government decision making. In the era of big data, it is challenging to address the dataand computingintensive issues by traditional platforms...

In recent years, many geospatial data sets have become available on the Web. These data can be incorporated into real-world applications to answer advanced geospatial queries. In this paper, we present a use case to integrate a local data set with external geospatial data sets on the Web. The data sets are modeled in different paradigms – relational and object-centered. The integration uses Pos...