Models of a distribution network grid are automatically updated in response to real-time location data of uniquely identified temporary devices. Current geographical coordinates are determined within a distance tolerance that is selected as a function of a type of device indicated by the identity indicia. The geographical information system model is updated with a location of a unique identity of the device at the determined current geographical coordinates within the distance tolerance if unique identity of the device not already present within the geographical information system model, or if it is present and a displacement distance from the determined current geographical coordinates of the temporary device to existing geographic coordinates that are stored in the geographical information system model in association with the unique device identity exceeds a specified distance margin.