Editorial.

Introduces research papers about spatial and computational intensive research published in the 1999 issue of "GeoInformatica." Retrieval of graphical images using cluster content-based wavelet selection process; Proposal for a speculative model as an extension of an infrastructure for distributed databases; Design a spatial query language for the accommodation of spatial analysis functions in the Web environment; Use of a combination of spatial clustering and graph theories for the simplification of road junctions during generalization.