The Institute of Hydrology investigates the effects of landuse, climate, topography and geology on the volume and character of water resources. It focuses on understanding water and energy fluxes arising from processes such as evaporation, interception and infiltration and modelling the hydrological cycle and chemical processes above and below ground. It is the aim of the Data and Software Syst...

In the last 20 years, several conceptual data models specific for Geographic Information Systems (GIS) have been proposed. However, so far there isn’t a consensus model, which has generated several problems for the GIS area, such as the lack of interoperability among CASE tools that give support to these models. A UML profile, called GeoProfile, was proposed to standardize the task of geographi...

Although many GIS data models are available, a declarative, operational, well-defined, implementation-independent, and objectoriented language is lacking. Based on the theory of many sorted algebra, this work presents a family of geometric data models. Some geographical data models of urban information systems are illustrated using homomorphism. According to the results, the preferred character...

Four centuries after René Descartes watched a fly walk across his ceiling and wondered how to capture its position (Gribbin 2002), we use Cartesian coordinates routinely to describe locations. We identify the positions of entities in the real world, transform their GIS representations from one coordinate system to another, and integrate spatially referenced data across multiple coordinate syste...

Four centuries after René Descartes watched a fly walk across his ceiling and wondered how to capture its position (Gribbin 2002), we use Cartesian coordinates routinely to describe locations. We identify the positions of entities in the real world, transform their GIS representations from one coordinate system to another, and integrate spatially referenced data across multiple coordinate syste...

This paper proposes an aerial data network infrastructure for Large Geographical Area Surveillance Systems. The work presents a review of previous works from the authors, existing technologies in market, and other scientific work, with goal creating supported by Autonomous Tethered Aerostat Airships used sensor fixing, drones deployment base, meshed nodes installation. proposed approach support...