Policy of openness is the process that involves; sharing of data collected by the city for the citizens and use new technologies to support transparency of governance. The policy of openess provides for gradual release of new public data sets, published in the open and structured formats allowing their reprocessing. Its aim is to create conditions for innovative use of information and inspiring entrepreneurship. The City of Gdańsk in accordance with the expectations of citizens, facilitate the way to reach the public information.