1. Method of identifying a planar object in source images comprising:— retrieving a first source image obtained by a first terrestrial based camera;— retrieving a second source image obtained by a second terrestrial based camera;— retrieving position data associated with the retrieved first and second source images;— retrieving orientation data associated with the retrieved first and second source images;— performing a combined looking axis rotation transformation and radial logarithmic space transformation on at least a part of the retrieved first and second source images by use of the retrieved associated position data and orientation data to obtain first and second radial logarithmic data images, wherein the looking axis rotation transformation corresponds to transforming the retrieved first and second source images into first and second intermediate images representing images having an identical looking axis;— detecting an area having similar dimensions in the obtained first and second radial logarithmic data image; and— identifying the detected area as a planar object.