Abstract: A virtual golf course generation system of the present embodiment includes: a field template generation unit for generating a field template including information on a terrain and an altitude of a specific location and information on an object, by using a result classified or extracted from different map data so as to generate a virtual golf course; a 3D green terrain generation unit for generating a 3D green terrain by using a three-dimensional mesh generated using terrains and altitudes of a green and a green bunker of the actual golf course to be displayed on the virtual golf course; and a matching unit for matching the generated 3D green terrain with the field template to generate the virtual golf course.

Abstract: A casing and an electronic device using the same are provided. The casing is disposed at the electronic device. The casing includes a frame and a key mechanism. The frame has a first lateral plate and a second lateral plate. The first lateral plate having at least one hole and at least one hook is connected to the second lateral plate. The key mechanism has a base plate, at least one trough and at least one key. The key protrudes along an extending direction and inserts into the hole. The base plate is disposed between the second lateral plate and the hook. The hook is wedged with the trough for connecting the key mechanism and the frame.