Abstract
Spatial OLAP systems are GeoBusiness Intelligence systems allowing the exploration and analysis of huge volume of spatial data by means of tabular, graphic and cartographic displays. Although map readability is crucial for the decision-making process, readability of SOLAP maps has not been deeply investigated. Therefore, in this paper we present a first study of readability metrics of SOLAP maps, and we propose some methods to improve them. We validate our proposal by using a real case study concerning farmland biodiversity analysis. Moreover, we present open issues associated to this topic.