This document discusses open data initiatives in Gdansk, Poland. It notes that open data has significant economic benefits, with studies showing impacts of 0.4-4.1% of GDP. Gdansk has an open data policy and shares datasets to increase transparency, boost innovation, and engage residents. Examples of open data projects in Gdansk include a daily published city expenditure list, a machine-readable city price list, and web applications around issues like planting trees and waste collection. Gdansk aims to encourage open data use, share source codes, and facilitate collaborative work through a citizen engagement platform.