Ocean modelling requires the production of high-fidelity computational meshes upon which to solve the equations of motion. The production of such meshes by hand is often infeasible, considering the complexity of the bathymetry and coastlines. The use of Geographical Information Systems (GIS) is therefore a key component to discretising the region of interest and producing a mesh appropriate to ...

It’s a well-known fact that new GIS applications need to keep track of temporal information. However, the most widely used spatial index, the R-Tree and its variants, do not preserve the evolution of bounding boxes. Some new indexing structures were proposed in the literature that allows the retrieving of present and past states of data. In this paper we evaluate the most popular indexes struct...

This paper introduces a visual query system for geographical information systems, which is easy to use for non-professional persons. The system creates a new iconic metaphor — a card, which has a very strong expressive power and can be used to represent complex spatial objects and spatial relationships between objects. The end users can describe their query requirements in a visual programming ...

In this paper we present a graphical query language for Geographical Information System. This language is based on a graphical Query-By-Example-like (QBE) philosophy. A set of graphical primitives (icons) represents data or operations such as inclusion, intersection, etc. The user-defined query is made by composition of these icons. The application of the icons defines the query as the data are...

Spatial analysis and spatial information systems have great potential in many nongeographic domains. This paper presents an example of the utility of spatial analysis in a non-geographic domain. A technique of pupillometry using digital infrared video loosely coupled with a Spatial Information System and a spreadsheet is developed to accurately quantify pupil dilation magnitude and constriction...

The objective of the research reported here is to develop a Multimodal 3D Geographical Information Systems (GIS) with haptic interface. In 3D environments, the complex spatial relationship between the entities and the influence of the light and shadow make operations of objects difficult and inefficient. Haptic interaction is then considered as an effective auxiliary method. We studied the feas...