This document discusses open data initiatives in Gdansk, Poland. It notes that open data has significant economic benefits, estimating a 0.4-4.1% increase to GDP from various studies. Gdansk has an open data policy and shares datasets to be reusable, credible, complete, and machine-readable. Examples of open data provided by Gdansk include city expenditure lists updated daily, a machine-readable city price list, and access to records of public information requests. The city develops open web applications using this data and shares the source code openly. It also supports an external civic engagement platform to connect officials and residents called CivilHub.org.