Dr. Junyoung CHOI obtained a master and Ph.D. degree in urban planning and GIS from Hanyang university, Seoul, Korea. After that, he worked at urban information research center and research group for mass transit reform in Seoul Institute from 2001 to 2003 and then moved to policy research center in Korea Local Information research and Development(KLID) until 2006. From 2006, he participated in the various national projects and researches on urban development, housing statistics, spatial big data and related spatial policy support systems for the Ministry of Land, Infrastructure and Transportation(MOLIT) and Korea Land and Housing corporation(LH). His current interests are big data for the smart cities in emerging mega cities, measuring and monitoring SDG 11 and New Urban using open data and open source GIS. Currently, he is participating in the new project with UN-Habitat and LH about the Global Challenge on the smart safer cities.