This paper introduces a new system of barrier-free information as integration of camera and GPS of mobile phones and map information. The system will help wheel chair users to find restroom and parking lots easily. We apply a new method to obtain high precision images when enlarged or reduced and to make a high-speed processing possible. In addition, we realize two innovative technologies: (1) prismatic markers and (2) display of several details information. By (1), a marker easily distinguished among others, While they were conventionally monochrome. By (2), one can indicate several information of different kind, like restroom and parking lots for example, at the same time on the map. We consider that this new system will contribute as a information navigation system of Musashino city.