A key component of tuning-up your GIS data to be public safety-grade is having the ability to validate your data to detect anomalies (potential errors) that might interfere with NG9-1-1 system requirements. 

Validations, therefore, are a series of checks run against data, and the results that are returned from these checks. 

NG9-1-1 validations differ from validations typically offered in CAD systems. CAD systems have very different data structure, topology and attribute requirements than NG9-1-1 systems. GIS data that validates in a CAD system may very well not work in an NG9-1-1 system. 

It is important not only to be able to validate your data that serves your own PSAP service area, but eventually to be able to validate your data against your neighbor’s proximal data. 

NextGen 9-1-1 GIS data requirements necessitate particular validations for the critical NG9-1-1 datasets: 

• Boundary validations  
• Address Point validations 
• Road Centerline validations  
• ALI validations  
• MSAG validations