1. A method of accessing an image database, the method comprising: receiving image data photographed by a camera; receiving camera location data provided by a global position system (GPS) locator and camera orientation data corresponding to the photographed image data, wherein the camera orientation data is an angle of a vector extending along a pointing direction of a camera with respect to a coordinate axis; associating, by using a processor, the camera location data and the camera orientation data as associated metadata with corresponding photographed image data; forming a database of the photographed image data including the associated metadata; receiving an instruction to generate a two-dimensional navigation map of a location of the user, the instruction comprising the location of a user and an orientation of a mobile device of a user at the location; determining a viewing direction of the user based on the orientation of the mobile device of the user; matching at least one photograph image in the database corresponding to the viewing direction of the user and the location of the user based on the camera location data and the camera orientation data associated with the database of photographed image data; generating the two-dimensional navigation map of the location of the user, the two-dimensional navigation map comprising the at least one photograph image; and displaying the generated two-dimensional navigation map.