Ortho-image creation system, ortho-image creation method, survey marker used therefor and road survey method

Abstract

The ortho-image creation method comprising: a coordinate acquisition step to acquire three-dimensional coordinates of a plurality of feature points; a photography step to photograph a plurality of photographed images of the plurality of feature points by an unmanned aerial vehicle or a model aerial vehicle flying overhead above a ground in such a manner that each feature point is included in at least two of the photographed images; and an ortho-image creation step to create an ortho-image on a basis of the three-dimensional coordinates of each feature point acquired by the coordinate acquisition step and the plurality of photographed images photographed by the photography step. In the ortho-image creation step, an ortho-image without a vehicle on the road is created by replacing the area around the vehicle on the road with the image of the road without the vehicle in another photographed image.

Dependencies are inferred from the claim text.