Interactive driving simulations enable early and comprehensive tests of driver assistancesystems under development. The close interplay between driver, assistance system, andenvironment can be investigated in a safe setting under reproducible conditions. Interactivedriving simulations, though, are complex systems on their own. They are based onvarious simulation models that need to interact at runtime. In this context, geo-specificenvironment models, which represent real world environments, are one important component.However, efficiently building such models is a challenge. For instance, there isa lack of a systematic integration of geo-data.In order to efficiently utilize interactive driving simulations, environment models needto be built systematically. Essential requirements in this field arise from the integrationof currently available geo-data as well as from the technical conditions of interactivedriving simulations. To address these issues, a systematics for the efficient building ofgeo-specific environment models for driving simulations has been developed. Central tothe systematics is a process model that structures necessary activities and tools in orderto efficiently build environment models. Thereby, existing methods and tools were integratedand whenever necessary new ones have been developed. The process modelis complemented by a prototypically implemented software tool, which finally enablesbuilding complete environment models.The systematics is validated by two real environments, for which environment modelshave been built exemplarily. The final evaluation of the systematics shows that the initiallyformulated requirements are entirely met.