In a server, a client for improving a three-dimensional air excursion and a method and programs thereof, a three-dimensional data can be automatically produced from aerial pictures or satellite images, and the three-dimensional air excursion on a three-dimensional solid map can be provided to a lot of users via the Internet. In the automatic producing of the three-dimensional image, a device for improving the produced images having defects is provided via the Internet. A particular user such as an owner or a manager of a particular structure such as a building, a monument in a park or the like can correct the images of the structure using a correction application via the Internet to obtain the more accurate images.