The Ruby classes and shell scripts located in the mrg and scripts folders provide the core foundation of the air-routes dataset along with methods to create and query the air-routes graph in various forms. The air-routes GraphML and CSV files located in the sample-data folder are created using these scripts. In the mrg folder you will also find a stand alone Ruby application that can be used to both build and query the air routes dataset. This application is used by the scripts in the scripts folder but the core classes can also be used as part of custom built Ruby applications.