Geospatial Information Technology (GIT) is being used in an increasing number of application fields and is relevant for more users than ever before. This diversity of applications and users raise questions about the relevance of different types of geo-representation (such as, maps, aerial photos, satellite imagery, 3D models) and their congruency with different user profiles. Studies have shown...

While inferring the geo-locations of web images has been widely studied, there is limited work engaging in geo-location inference of web videos due to inadequate labeled samples available for training. However, such a geographical localization functionality is of great importance to help existing video sharing websites provide location-aware services, such as location-based video browsing, vide...

The Gene Expression Omnibus (GEO) at the National Center for Biotechnology Information (NCBI) is the largest public repository for high-throughput gene expression data. Additionally, GEO hosts other categories of high-throughput functional genomic data, including those that examine genome copy number variations, chromatin structure, methylation status and transcription factor binding. These dat...

The ubiquity of low-cost GPS-enabled mobile devices and the proliferation of online social networks have enabled the collection of rich geo-social information that includes the whereabouts of the users and their social connections. This information can be used to provide a rich set of access control policies that ensure that resources are utilized uniquely and securely. Existing literature focu...

Combined processing using different sensor types, i.e. for applications like change detection, requires a good geo-referencing. Furthermore the individual sensor properties have to be taken into account. SAR systems are side-looking and run-time systems. They suffer from occlusions and ambiguities especially in urban areas. Additionally layover and shadow effects disturb the geo-referencing of ...

Interoperability is a crucial problem for geographic information systems. The transfer of data and models between different systems requires the ability to set up a correspondence between concepts in one system to concepts in the other. Concept matching is helped by ontologies. However, the challenge of making ontologies themselves interoperable continues. In other words, given two geo-ontologi...

P ropelling aerosols into the upper atmosphere or pumping carbon dioxide into the deep ocean are just two schemes that have been proposed to repair the Earth’s climate through geo-engineering1 (see Box 1). In the absence of adequate reductions in anthropogenic CO2 emissions, geo-engineering has been put forward as the only remaining option that might fix our rapidly changing climate2. Because s...

Data security in a mobile context is a critical issue. Over the last few years a new category of location-based services, the Enterprise LBS (ELBS), has emerged focusing on the demands of mobility in organisations. These applications pose challenging requirements, including the need of selective access to ELBS based on the position of mobile users and spatially bounded organisational roles. To ...

Geographic Information Retrieval (GIR) in an attempt to improve relevance by taking geographic information in textual documents into account. We describe out experiments carried out at the GeoCLEF 2007 evaluation [1] that investigate further the role of geo-filtering based re-ranking and query expansion with geographic terms. Our main findings are that manual query expansion with geo-terms is m...