Data.One is a portal to facilitate the wider dissemination of Public Sector Information (PSI) for value-added re-use. All datasets are free-of-charge for commercial or non-commercial re-use.
Data includes water quality, weather, population census, public transport and more.
All data on this portal are freely downloadable and re-usable and some are in XML format for convenient data transfer and processing by computers. Refer to the Terms and Conditions of Use for more details.
Visit the datasets here: http://www.gov.hk/theme/psi/datasets