The Global Nav Generator (GNG) is a tool that allows all VATSIM organizations to create, maintain and enhance sector files and other relevant files for controlling software. Special attention was given to the atomization of routine workload, to the validation and consistency of data and to the inter-organization cooperation. Hence a lot of data is taken automatically from Aerosoft's NavDataPro AIRAC cycle, the entered data is validated to ensure consistency of the data and relevant data from neighbouring sectors is taken into your sector files.
You can find some more information in our presentation from the VATSIM conference W14 this year.
Presentation W14 (pdf)