Developing a Multi-sensory Public Participation GIS (MSPPGIS) method for integrating landscape values and soundscapes of urban green infrastructure

This paper develops, tests and validates a Multi-sensory Public Participation GIS (MSPPGIS) method combining the qualities of soundscapes and landscape values mapping. The development of the method involved: a) Public Participation GIS survey design; b) three-phase evaluation of survey addressing analytical, applicability and usability criteria; c) survey refinement; d) sampling and data collection, and; e) spatial data analysis. The analysis consisted of hotspot mapping involving Kernel Density Estimation, spatial overlap assessment using Jaccard coefficients and value compatibility analysis showing the level of spatial compatibility between positive landscape values and positive and negative soundscapes. Results indicated very low to low spatial overlap between the different landscape values and pleasant/unpleasant sound hotspots, suggesting that landscape values do not necessarily reflect sonic perception of urban green and blue spaces. Pleasant and unpleasant sounds were located closer to home than landscape values (except for urban life values), indicating that respondents' soundscape 'cognitive map' is smaller in spatial range. The MSPPGIS method enables the elicitation of a more dynamic and diverse set of sounds compared to previous soundscape mapping which tend to focus on 'noise' instead of multiple experiences of different sounds. Also, the combination of landscape values and soundscapes in MSPPGIS provides for a more integrated assessment of 'where' and 'how' to design urban green infrastructure.