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About MarinMap

MarinMap is a group of local governments, special districts and other public agencies that have joined together to create a Geographic Information System (GIS).  MarinMap agencies work together improve public service and each other's business processes, as well as provide a forum for group decision making.

Member agencies are organized as a project of the Marin General Services Authority (MGSA).  The MGSA is a Joint Powers Agency with a governing Board consisting of Town/City Managers, the County Chief Administrative Officer or his/her designee and two Public Works Directors. MGSA meets at last 6 times a year; more frequently if needed.

MarinMap Benefits

The benefits for agencies cooperating via MarinMap can be significant. For example, by mapping and sharing information about public works projects, agencies can coordinate any digging and street repairs. This can prevent your street from being dug up several times by different agencies that didn't know what their colleagues were doing. Agency employees can benefit by learning from each other and sharing ideas. This leads to the development of "best practices" among them. There is probably one best way (or at least a very good way) to do something that everyone could do. This alone can improve public service. MarinMap can also improve the "geographic literacy" of everyone by placing GIS technology on the World Wide Web. Anyone with Internet access can learn about any area in Marin County. Information can be published with map locations.

Problems rarely respect jurisdictional boundaries: natural disasters such as fires, floods or earthquakes may affect many jurisdictions. MarinMap provides a forum for agencies to coordinate their preparations and response to larger scale problems. Members can share all relevant data necessary to address a problem and negotiate solutions. Today's GIS technology can help agencies update their information in real time and keep current as a situation unfolds.


  • Provide improved customer service to customers seeking geographically based information;
  • Reduce the cost of service to taxpayers and ratepayers;
  • Improve agency business processes;
  • Provide the opportunity for better decision-making; and
  • Encourage cooperation among public agencies, eliminate redundancies, improve efficiency and minimize conflicts.


  • Create a system to collect and distribute geographical information
  • Maintain the integrity of the geographical information
  • Provide enhanced access to geographical data to public agencies and the public
  • Develop an equitable means to share Geographic Information System costs
  • Establish the exchange of information between participating agencies
  • Create a GIS database and computer applications to support agency programs