Abstract: A copolymer polyester resin and a preparation method therefor are disclosed. The copolymer polyester resin contains a repeating unit derived from diol components and a repeating unit derived from a component of dicarboxylic acid or a derivative thereof, in which, by adjustment of the amounts of a first diol to a third diol or a fourth diol to a sixth diol, included in the diol components, impact strength and intrinsic viscosity are controlled to be within appropriate ranges without degrading transparency, and thus miscibility is excellent. Therefore, the copolymer polyester resin can exhibit excellent characteristics when utilized in various fields requiring high impact strength and high heat resistance, such as packaging materials such as food containers, and interior materials for vehicles.

Abstract: A spatial data service system includes a spatial data output client 10 and a spatial data server 20. The spatial data output client 10 progressively displays on a user's screen spatial data which has been progressively received from the spatial data server 20. Thus, the user can save time required for confirming the spatial data. Further, time consumed for processing a request for additional spatial data, if any, can be reduced. Still further, since transmission of unnecessary data is efficiently avoided, a network load can be lowered, resulting in reduction of additional costs that might be caused due to the network load.

Abstract: Disclosed is a virtual navigation system using a moving image. The system comprises an input section for inputting a command information such as a departure point and a destination each related to a traveling route; a traveling route estimating section for reading the traveling route from the departure point to the destination, which is inputted by the input section, from stored data to estimate an optimum traveling route; a traveling route processing section for processing the moving image for a road and surroundings around the road of the traveling route estimated by the traveling route estimating section; an information processing section for searching moving image data and spatial data each related to the road and the surroundings under control of the traveling route processing section; a storing section for storing road data shown in a map, and the moving image data and the spatial data related to the road and the surroundings.