This paper provides a methodology to assess the quality of generalised geographic data. Generalisation consists in representing in a simplified way a same geographic space, according to the scale and to the objectives of the map. The approach is based on (1) a data characterisation in its initial and final state at different level of analysis, (2) a data quality assessment from the comparison o...

Geographical databases are often incomplete, especially when built up incrementally and by volunteers. A prominent example is OpenStreetMap. Often such databases contain also metadata saying that certain features are completely captured for certain areas. We show how to use such metadata to analyse in which areas queries return a complete answer. Such “completeness areas” can be computed via st...

This paper reports an experience in which a temporal database was used to analyze the results of a survey on human behaviors and displacements in a ski resort. This survey was part of a broader study about the use of the resort’s infrastructure, based on the time-geography methodology. As such, the presented experience may be seen as an attempt to implement some concepts of the time-geography u...

Nowadays, the proliferation of geographic information systems has caused great interest in geographical ontologies. Geographical ontologies have been introduced to facilitate knowledge sharing and to assist in recognizing spatial terms employed in a query. In this research the full model of the Nile River geographical ontology has been developed to meet the needs of the recognition of the termi...

This paper places geographical information systems (GZS) in the context of information systems generally and spe@cally illustrates how GIS may be classified by adapting an earlier taxonomy of information systems. The recent literature on information systems taxonomies is critically reviewed and an earlier taxonomy is tested and applied against several case study organisations who use GIS. It is...