For generating a landscape texture of a geographical map, a plurality of images captured by one or more hand-held devices (10) equipped with a camera are obtained. Further, additional data associated with each of the captured images are obtained. These additional data include a geographical position of the camera when capturing the image, inner camera orientation data representing properties of the camera when capturing the image, e.g., a focal distance, a camera constant, and/or a position of an image principal point, exterior camera orientation data representing an orientation of the camera when capturing the image, e.g., an angle (¦) representing an orientation of an optical axis (A) of the camera with respect to a horizontal plane (PH) and a barometric height of the camera when capturing the image. On the basis of the barometric height and the geographical position, a ground height (H) of the camera above a ground surface (G) is determined. On the basis of the ground height (H), the inner camera orientat
