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GIS Services


Geographic Information Systems (GIS) play a critical role in public safety. Accurate GIS data is key to ensuring NG9-1-1 calls are routed to the appropriate PSAP and emergency services are dispatched to the correct location.

Data Preparation for NG 9-1-1


Geographic Information Systems (GIS) play a key role in locating emergency callers and routing them to the correct PSAPs. DDTI has extensive experience assisting jurisdictions prepare for this transition.

We work with local GIS personnel to import, verify and transform source data into the required i3 NENA Civic Location Data Exchange Format (CLDXF). A detailed and repetitive quality assurance process ensures the data is consistent and accurate and we never require our customers to alter existing GIS data schemas, eliminating unwanted impact on day-to-day operations.

Once completed, this extract, translate and load (ETL) process forms the foundation for ongoing GIS updates to the ECRF/LVF, map display software and other systems. 

Ohio's Location Based Response System (LBRS)

In support of the Ohio Department of Transportation’s efforts to develop a statewide Location Based Response System (LBRS), DDTI created spatially accurate street centerlines and field-verified, site-specific address locations. This information is utilized by a variety of State Agencies responsible for emergency response efforts and disaster planning and is instrumental in protecting the health and safety of Ohio’s citizens.


The U.S. Department of Transportation specifically noted that the accuracy of LBRS data and the collaboration of organizations required to build Ohio's LBRS, could serve as a model for the nation.



ResponseAssist is an Esri-based tactical map display integrated with the call taker workstation and compliant with all relevant NENA standards. Key features include:

  • Customizable graphics to distinguish 9-1-1 events and map callouts to automatically display pertinent information for the incident location. 

  • Third party software integration with RapidSOS and Pictometry imagery for enhanced incident location display.

  • Map discrepancy reporting and historical incident retrieval for analysis.

  • Address, street, points of interest, and latitude/longitude search capabilities.


Field Data Collection

For jurisdictions desiring the highest level of precision for their GIS data, DDTI offers a comprehensive Data Collection Service. Our GIS professionals drive every publicly accessible road to field-verify road centerlines, addresses and other key information to create the most up-to-date, thorough and accurate GIS maps.


We utilize innovative mobile mapping technology to map a jurisdiction with spatially accurate, three-dimensional results. Our experience and methodology have enabled us to offer a Data Collection process that is both timely and cost effective.

NG9-1-1 relies on up-to-date GIS data to function effectively, but not every jurisdiction has the expertise to manage the updating process.


GIS Data Maintenance

DDTI's  Data Maintenance is a multi-user GIS solution that empowers authorized users to add, modify or delete roads, addresses and other data (e.g., fire hydrants, school zones, jurisdictional boundaries, etc.) as needed. The interface is intuitive and simple, minimizing complexity. To add an address, simply follow a prompted series of steps, with attributes generated within the application to ensure accuracy. Quality control checks flag errors before the entries are entered into the database.


A full audit trail of data edits is maintained and a web-based administrative interface manages users, permissions, quality control parameters and data publishing.

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