The elves had already mastered map drafting knowledge at a high school level, including a few of the most outstanding students like Tyr who would be conducting the mapping task using the method of measuring longitude and latitude, and assisted with rudimentary tools such as the sextant, hourglass, and telescope. Li Lin, however, did not expect them to produce high-precision military maps in one fell swoop. The main purpose was to practice mapping and familiarize themselves with the intended battlefield. High-precision maps still had to rely on him.