Increasingly, citizens are demanding access to raw data from governments to hold public officials accountable, look up facts, conduct analysis, or create innovative applications and services. Cities and towns create data using geographic information systems such as layers describing parcels, zoning, and infrastructure that are useful for a wide range of purposes. Through a public records request to all 351 Massachusetts municipalities, this paper investigates whether these data are accessible to citizens in practice. Some response was received by 78.6 percent of the municipalities. Two municipalities refused access to all electronic records. Many others charged fees ranging up to $453 or placed legal restrictions on the data through licensing that could chill or prohibit creative reuses of the information through emerging technologies. Other practical barriers limited public access to data, such as limited resources, government officials’ limited technical knowledge, and outsourcing to private vendors. A followup survey among municipalities that did not respond to the request was conducted to determine if they had GIS systems or data policies, and this information was collected for 80.3 percent of the municipalities. Finally, the paper discusses the legal, policy, and technical steps that can be taken by governments to move from a “public records” to an “open government” paradigm for transparency of government data. The policy recommendations for municipalities include publishing GIS data for free online and with minimal legal restrictions.