# Possible Blockchain Solutions According to a Smart City Digitalization Strategy
## 3 Digitalization Strategy of City Governance
### Geoinformation System  
Spatial data are inseparable from most urban processes. Therefore, special attention should be paid to the procurement of integrated GIS (Geographic Information System), which would, as far as possible, include all relevant data for the processes in question, i.e., avoid the procurement of partial solutions. To collect geolocations in Osijek, we created an application for collecting geolocations using parameters such as the name of the city and street number [63]. To visualize collected data, geolocations were plotted, resulting in the contour of the City of Osijek, as shown in Figure 11. These data can show population density in different places around the city and manage city services upon them.  
Geolocation data can minimize the costs and travelled distance by locating public services in high-density areas to fulfil the tasks efficiently. The tasks are completed efficiently, and predictions can be made using previous data, such as predicting the needs for exceptional situations that can dramatically change the future requirements and share these data with users. Drones can use geolocation data for city regions to identify the location of the supervised area and collected data [11], location of the emergency disaster, traffic jams, and safety violations [12; 13]. Different internet platforms and companies like Google, Uber, Amazon, and Airphb base their services on geolocation. User identity in a Smart City will be online, and geolocation can be used to improve their experience of Smart City applications. It is important to identify the area of services and offer services and products specifically for users' geographical location. For example, Google Maps show the closest shops, restaurants, pharmacies, etc., and services are based on geolocation. Knowing the real-time user and car position in resource sharing applications and transportation applications like Uber is essential. Collected data can be used to identify the area in a Smart City with traffic jams and traffic accidents rate and to improve traffic control. Users have mobile devices which are aware of their location, and if users share their data, it is helpful for Smart City governance to improve the quality of their services. In Figure 11 are shown geo-coordinates in the City of Osijek, which can be provided for any city on the same way. The digitalization strategy for the City of Osijek, which is presented in this paper, can be transformed into any other city. Geolocation can be used for resource sharing like e-bikes in the City of Osijek to locate every bike location and share information with users. Information can be stored in the blockchain to gain traceability, transparency, and trust.  
Some smart applications can retrieve relevant information about users and their surroundings to create location-aware city services based on data from IoT devices [64]. Geographical data can be stored in the cloud and used for spatial data purposes, where each data is connected with spatial origin. For example, if some sensors detect smoke, it is easy to locate the fire area from a sensor's spatial data. Spatial data can be used to monitor  
Figure 11: The collected geo-coordinates in the City of Osijek.  
older people's data using wearable devices, outdoor sensors, and smart city systems to ensure better healthcare, monitor physical activity, and base interventions on collected data to reduce frailty risks [65].