Probably this question was asked, but I couldn't find solution to my problem. I have an image with exif GPS location (which is position of the camera) as well as elevation above sea level. How can I calculate (estimate) real world positions/coordinates of objects present in an image? Is it possible to measure distance from camera to objects photographed with only one point of reference? What parameters beyond exif data are needed to perform such calculation?
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I think you will need also camera orientation ... If you have access to 3D surface map of shooted region its possible to infere the orientation if enough relief data is present on the image (by matching hills ...). see [Augment reality like zookazam](https://stackoverflow.com/a/35752786/2521214) for some ideas (especially reconstruct the scene into 3D mesh links) – Spektre Dec 23 '21 at 07:53