In order to integrate road traffic into the digital twin, high-precision measurement control points are required.
Control points are permanent ground control points that are required for the georeferencing of mobile mapping and aerial images as well as drone images. Permanent objects on the road are particularly suitable for this purpose. Around 24,700 control points were measured using the Global Navigation Satellite System (GNSS), half were measured by two engineering firms and the other half were measured by GeodatenService München using electric bikes. This enabled time- and cost-saving field deployment in Munich's city traffic and in urban parks and green spaces. The points were given a code for unambiguous identification and around 10,000 points were documented as photos. This procedure ensures that the mobile mapping survey data achieves an average accuracy of < 10 cm.