Various examples of methods, systems, apparatus and devices are provided for accurately tracking of workers and assets. Aspects of the present disclosure include tracking the location and other information for workers and assets in locations where knowledge about such workers and assets is desirable. The disclosed worker and/or asset tracking is particularly suitable for locations where the structural components are added, modified or moved during a monitoring period. Such structural components can block all or part of GPS, WiFi and RFID signals, or where it may be otherwise impractical to utilize other forms of signal generation.