IoT and Real time data have been the key technology driver for Smart City. Actually, majority of real time data from various IoT sensors will carry locations. In this talk, we will introduce ArcGIS GeoEvent Server which can track dynamic assets that are constantly changing location such as vehicles, aircraft, and vessels or stationary assets such as weather and environmental monitoring sensors. In addition, it provides real-time situational awareness for coordinated field activities. By integrating Esri and OSIsoft technologies, we can combine both time and space to give you greater insight into your assets and improved tools for systems management that deliver operational spatial intelligence.