| 摘要 |
A determination unit determines, on images of video data where a road set as a survey target was shot in different times, whether or not the shooting position of the image is within a tolerance value with the shooting position of any of the images as a reference, for each image having a corresponding shooting position. When the shooting position is determined to be within the tolerance value, a creation unit creates screen information of a screen where images that has been determined to be within the tolerance value is displayed in synchronization. Moreover, when the shooting position is determined to be beyond the tolerance value, the creation unit creates screen information of a screen where an image that has been determined to be beyond the tolerance value is undisplayed.
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