Cooperative trucks and drones for rural last-mile delivery with steep roads

The following instances are originally presented in the paper Cooperative trucks and drones for rural last-mile delivery with steep roads. The data includes 96 instances corresponding to different scales and scenarios. Each instance is named "n. d. m. h", where n is the number of customers, d represents the dimension of the grid, m is the generic name of the scenarios with different coordinates and demands, and h refers to the generic name of the altitude scenarios. The first column of each instance file indicates Coordinate X of each customer. The second and third columns are Coordinate Y and Demand, respectively. The last column is Altitude. Finally, there is an extra file, named Supplemental online material, which provides the following appendices： Appendix A: Provides calculations about the main parameters of drone energy consumption. Appendix B: Discusses the differences between the proposed problem with GVRPD and GVRP-SR. Appendix C: Provides the detailed principles for generating benchmark instances. Appendix D: Provides information about the value of the parameters in the main configuration of the problem.