Resumen
This paper presents the main characteristics of on-demand mapping on the web and focus on the existing tools which propose to a user to specify his styles. Most of on-demand maps applications do not help the users in the map design process. Customisation options exist, but the user may not reach a correct and satisfying result. Our purpose is to assist users in their map design process and especially in creating accurate styles in order to conceive satisfying legends. We propose a man-machine dialogue between users and a system that holds cartographic expertise. This dialogue relies on creation strategies in order to satisfy both user?s (tastes and needs) and system?s (cartographic rules) constraints.