A method for associating geographic location information with a power system model. The method generally includes the steps of receiving known geographic information for a plurality of power system assets within the model and automatically calculating the geographic information for other power system assets with unknown geographic information based on the imported geographic information and architectural information available within the model. The step of calculating the geographic location information may be performed iteratively initially using only imported geographic information and subsequently using both imported and calculated geographic information. The geographic location of each power system asset with an unknown location may be determined through multilateration based on known locations and branch connection lengths of two or more connections with known geolocations.