08/09/2026
The Power of Statewide GIS Data Sharing: Moving 911 Into the Future
As states across the country continue their transition to Next Generation 911 (NG911), one of the most critical — and often underappreciated — components of that journey is Geographic Information System (GIS) data. A recent 911 committee meeting highlighted just how transformative statewide GIS data sharing can be for emergency communications, and why the move toward Phase II of NG911 implementation is a milestone worth paying attention to.
What Is GIS Data and Why Does It Matter for 911?
GIS data is the digital backbone of modern 911 systems. It includes address points, road centerlines, municipal boundaries, and dozens of other geographic layers that tell a 911 system exactly where a caller is located and how to route that call to the correct Public Safety Answering Point (PSAP). In legacy 911 systems, this data was often siloed — managed independently by individual counties or municipalities, with little consistency from one jurisdiction to the next. NG911 changes that equation entirely. The National Emergency Number Association (NENA) has established the Emergency Incident Data Object (EIDO) and GIS data standards that form the foundation of an interconnected, IP-based emergency communications network. For that network to function at its full potential, GIS data must meet those national standards — and it must be shared.
The Case for Statewide Data Aggregation
The benefits of bringing GIS data together at a statewide level are both practical and profound. When GIS data is aggregated under a common statewide framework, it saves significant time and effort. Instead of multiple agencies independently gathering, formatting, and maintaining the same geographic information, a centralized repository means the data is available in one place reducing redundancy and freeing up local resources for other priorities. Statewide aggregation ensures that local data is validated against national NG911 standards. This is critical for interoperability, the ability for systems and agencies to talk to each other seamlessly, especially during large-scale incidents. Emergencies don't respect county or municipal lines. A statewide GIS framework ensures that when an incident crosses jurisdictional boundaries — or when mutual aid is activated — the data supporting those response efforts is consistent and compatible. First responders, dispatch systems, and navigation tools all speak the same geographic language. Data quality is not a one-time achievement; it requires ongoing attention. A statewide model encourages — and in many cases formalizes — collaboration between local and state agencies on continuous data maintenance and standardization. When everyone contributes to and benefits from the same dataset, the incentive to keep it accurate and current is shared.
Real-World Benefits Already Being Realized
The advantages of statewide GIS sharing aren't theoretical — they're already being felt in states that have moved in this direction. One compelling example involves aviation. When the state helicopter crews can operate using the same GIS-based navigation systems as local ground responders, it helps with coordination and accuracy. Consistent, standardized address points and road data mean that whether you're navigating by air or by ground, the underlying geographic intelligence is the same. That kind of interoperability can make a meaningful difference in response times and situational awareness during critical missions.
New York State offers an instructive example of what open GIS data can accomplish. After making its address point data publicly available, the state observed a tangible and perhaps unexpected benefit: improved delivery accuracy from commercial carriers like UPS and FedEx. When address data is clean, validated, and accessible, the benefits ripple far beyond 911 into everyday commerce and public services — and that real-world feedback loop actually helps keep the data accurate over time. It's a compelling proof point that investing in GIS quality pays dividends across an entire community. A statewide GIS model doesn't mean agencies lose control of their data. In Michigan, the Department of Technology, Management and Budget (DTMB) presented a framework built around formal data sharing agreements that strike a careful balance.
These agreements are designed to:
● Preserve existing uses of GIS data by local and county agencies
● Authorize counties to contribute to and access the statewide framework
● Maintain protections under the state's Enhanced Access to Public Records Act, ensuring that third-party data requests are handled appropriately
Additionally, the framework provides options for making specific GIS data layers available as open data — but with controls. Agencies can choose to limit which attributes are publicly accessible, ensuring that sensitive information is protected while still delivering value to the public and other stakeholders.
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