Mobile devices, such as smartphones and tablets, are useful tools for in situ gathering information about spatial locations. Specialists need mobile geographical data acquisition and validation systems to be used in fieldwork and in places where there is limited or any network connectivity available. This paper presents an ongoing work on designing and implementing a hybrid architecture for thi...

As discussed in Section 2.1, AT is further divided into two components, namely Probe Wait and Bcast Wait. We argue that it might be more appropriate to divide AT into four components: Index-Probe Wait (IPW), Index-Bcast Wait (IBW), Data-Probe Wait (DPW) and Data-Bcast Wait (DBW). IPW is the same as Probe Wait defined in (Imielinski, 1997), i.e., the time duration of getting to the nearest index...

Huge amounts of data have been stored in databases, data warehouses, geographic information systems, and other information repositories , and this data is still growing rapidly 4]. Companies are building data warehouses capable of storing hundreds of terabytes of data related to natural resource exploration; astronomical databases are measured in terabytes in size; and it is expected that the N...

Geographical data is inherently uncertain. There are a variety of sources that contribute to this uncertainty. Operations performed on data during an analysis will most likely only increase this uncertainty. To understand the uncertainty in the results of an analysis, requires information about the uncertainty in the input data, and some idea about how various analysis operations propagate and ...

Although many GIS have been successfully implemented, it has become quite clear that two-dimensional maps with most complex contours and color schema cannot precisely present multidimensional and dynamic spatial phenomena. Most GISs in use today have not been designed to support multimedia data and therefore have very limited capability due to the large data volumes, very rich semantics and ver...

SUMMARY Geoinformatics is described as a scientific and technical complex integrating the branch of scientific knowledge, the appropriate technology and the applied, or productive, activities concerned with the development and implementation of geographical information systems. Four stages of geoinformatics evolution are discussed, and its prospects are outlined in brief. 1. Introduction Geoinf...

The increasing number of cyber incidents that critical infrastructures are experimenting is pushing for developing situation awareness systems that exploits geographical data about the network under control. This poster describes the Visual Analytics solution that is under development in the European project PANOPTESEC [6] for monitoring the ACEA (an Italian organization that provides power to ...