A photographing apparatus (101) transmits apparatus information (130) of the apparatus to an information providing apparatus (102). Based on the apparatus information (130) from the photographing apparatus (101), the information providing apparatus (102) extracts from a reference scale DB (120), reference scale information that indicates a dimension to be used as a comparison reference of a given crop to be photographed by the photographing apparatus (101) and transmits the reference scale information to the photographing apparatus (101). Based on a photographing condition at the time of photographing of the given crop and the reference scale information (140) from the information providing apparatus (102), the photographing apparatus (101) creates an image picture representative of the dimension to be used as the comparison reference of the given crop on a photographed image taken by a camera (110). The photographing apparatus (101) outputs the photographed image taken by the camera (110) and the created image picture in a correlated manner.
