This was a lecture where I could learn how to create and utilize map services in general through practical lectures. The instructor's kind and detailed explanations were really helpful. What impressed me the most was the speed of the Q&A response and the kindness of looking into the details. You said that you will update various contents such as DB in the future, so I will definitely check it out and study it additionally when it is uploaded. I sincerely thank you for creating such a useful lecture.