1. A method of operation of a computer system comprising: receiving a set of tie points for a first image captured by a camera; iterating through sets of camera parameters for the first image; calculating a least squares fit value for each of the sets of camera parameters; selecting a set of camera parameters from the sets with a least error in the least squares fit value; calculating two-dimensional coordinates for the pixel of the first image based on an overlapping area of an orthorectified image; and calculating a geo-location for a pixel of the first image using the selected set of camera parameters for constructing a three-dimensional image on a display; wherein the fist image is an oblique image.