Called the Miracle of the Han River, Seoul is the fastest-developed city in the history of the world. Our Seoul is full of energy during the day and places where you can experience colorful culture at night. The city lives and breathes with 20 million Seoul citizens. However, in order to constantly follow what is happening in this busy city and our neighborhood, there is a limit to the web 1.0-based map service. Destructive innovation is needed to fully express the beauty of Seoul. In fact, the transition from Web 2.0 to Web 3.0 is already taking place in many other industries, including payment systems, stock trading, games, and SNS. ...