started. The questionnaire recorded the characteristic of the smell,
wind direction, OI, and the other characteristics at each measurement
site. The participants received remuneration for taking the
survey sincerely and responsibly. Before starting field inspections,
the participants were familiarized with the locality (Sucker et al.,
2008).
The OI values determined based on the RMR were analyzed
using the SPSS program (version 18.0, USA). To analyze the OI