Abstract: A plurality of images is obtained, whether as separate images or part of a video. The plurality of images is used to generate a three-dimensional (3D) model of the imagery. The 3D model is registered to a geographic coordinate system as a first registered 3D model. The first registered 3D model is merged with a second registered 3D model to generate a merged 3D model. A request including a value corresponding to a location within the geographic coordinate system that includes at least a portion of the merged 3D model is received from a client device. A message identifying at least a subset of points in the portion of the merged 3D model is sent to the client device, each point in the subset having a three-dimensional coordinate.