Increasing urbanization has prompted urban residents to look for solutions to alleviate urban environmental issues such as air and noise pollution. High-rise buildings have become a preferred choice for those looking for cleaner air and a quieter living environment. This disclosure describes techniques to crowdsource floor information from residents of high-rise apartments and to use such information to prioritize search results based on a herein-defined residential quality index (RQI). The techniques address limitations of current map or search applications by providing accurate floor and environmental quality information for high-rise apartments
