Management of Continuous Spatial Changes

Two distinct approaches can be identified in the modelling of spatial data, one that considers discrete spatial objects and another that considers continuous spatial changes. The first approach fits better cartographic applications whereas the second is commonly used in the modelling of continuous changes of physical phenomena such as temperature, elevation, atmospheric pressure, etc. Due to the fact that the two approaches aim at satisfying distinct user requirements, distinct algebras have also been defined. The present paper aims at bridging the gap between these two approaches. In particular, it considers an SQL extension that has been defined in previous research work for the management of discrete spatial objects and shows that it can be applied for the management of continuous spatial changes.