Method and system for creating images

A method of generating an orthomosaic image of a geographical survey area is disclosed. The method comprises the steps of (a) recording a set of still images of the survey area using a land-borne camera, in which the camera has an optical axis that is angled downwardly with respect to a surface of the survey area and recording a geographical position corresponding to each image (b) comparing pairs of partially overlapping images to identify common features in the image to derive a model of the motion between the images (c) calculating a pose in respect of each image describing where the camera was in world coordinates and where it was looking when the image was captured; d. projecting each image onto a ground plane to create a set of image tiles; and e. stitching together a plurality of image tiles to create an orthostatic image corresponding to an area that is present in a plurality of the images recorded in step (a). Procedures for detecting overlaps in images and identifying common features are also disclosed.