The purpose of the CartASUR (Représentations Cartographiques de la qualité des Ambiances Sonores Urbaines: acceptabilité des Cartes) research project in which SOFT is a subcontractor is to develop a tool capable of creating sound maps representing the urban soundscape at different spatial scales of the city (such as major roads and neighborhoods) as well as different time scales (such as a time period within a year or the time of day). This tool can help policy makers to enrich noise levels with perceptual and geographic indicators. Hence, soundscapes in urban public space are enriched with sense of pleasure/discomfort perceived by its citizens. Noise level indicators are currently defined on a yearly and national scale and do not incorporate citizen perception. We hypothesise that noise level indicators can be constructed from perceived data (citizen-supplied data transmitted via their mobile phone), from acoustic data (measurements taken of the changing sound level over time), and from other georeferenced data (collected from local authorities). The aggregated data will allow policy makers to better take into account the effect of noise on the quality of life. Additionally, this tool can be used by citizens to govern their own city.