A computer-implemented method for calibrating at least one camera (102, 104, 106), the system including at least one camera (102, 104, 106), the method comprising: displaying a video feed from the at least one camera, the at least one camera (102, 104, 106) having an orientation characterized by pan, zoom, and tilt values, wherein the video feed has upper left, upper right, lower left and lower right corners; displaying a map of an area, the map being characterized by geospatial coordinates; allowing a user to select at least three pairs of points using at least one input device, a first point of the pair being selected in the map and a second point of the pair being selected from the video feed, the first point and the second point corresponding to the same geographic location; converting, in a computer process, the at least three points selected in the map from geospatial coordinates into Cartesian coordinates in three dimensions defined by a first three-dimensional coordinate system; converting, in a computer process, the at least three points selected in the video feed from effective pan and tilt coordinates into Cartesian coordinates in three dimensions defined by a second three-dimensional coordinate system, wherein effective pan angle corresponds to pan for the camera orientation plus a fraction of a horizontal field of view determined by zoom of the camera and effective tilt angle corresponds to tilt for the camera orientation plus a fraction of a vertical field of view determined by zoom of the camera; determining, in a computer process, a mathematical rotation between the first three-dimensional coordinate system and the second three-dimensional coordinate system based upon the Cartesian coordinates for the at least three pairs of points; determining, in a computer process, effective pan and tilt angles for at least the lower left and lower right corners of the video feed; converting, in a computer process, the effective pan and tilt angles for at least the lower left and lower right corners of the video feed into Cartesian coordinates in three dimensions defined by the second three-dimensional coordinate system; applying, in a computer process, the rotation to the Cartesian coordinates defined by the second coordinate system to determine Cartesian coordinates in three dimensions defined by the first coordinate system for at least the lower left and lower right corners of the video feed; determining, in a computer process, a view cone using the Cartesian coordinates defined by the first coordinate system for at least the lower left and lower right corners of the video feed and based upon the upper left and upper right corners of the video feed; and displaying the view cone on the map, wherein the Cartesian coordinate systems are centered on the position of the camera and the geospatial location of the camera is known. displaying a video feed from the at least one camera, the at least one camera (102, 104, 106) having an orientation characterized by pan, zoom, and tilt values, wherein the video feed has upper left, upper right, lower left and lower right corners; displaying a map of an area, the map being characterized by geospatial coordinates; allowing a user to select at least three pairs of points using at least one input device, a first point of the pair being selected in the map and a second point of the pair being selected from the video feed, the first point and the second point corresponding to the same geographic location; converting, in a computer process, the at least three points selected in the map from geospatial coordinates into Cartesian coordinates in three dimensions defined by a first three-dimensional coordinate system; converting, in a computer process, the at least three points selected in the video feed from effective pan and tilt coordinates into Cartesian coordinates in three dimensions defined by a second three-dimensional coordinate system, wherein effective pan angle corresponds to pan for the camera orientation plus a fraction of a horizontal field of view determined by zoom of the camera and effective tilt angle corresponds to tilt for the camera orientation plus a fraction of a vertical field of view determined by zoom of the camera; determining, in a computer process, a mathematical rotation between the first three-dimensional coordinate system and the second three-dimensional coordinate system based upon the Cartesian coordinates for the at least three pairs of points; determining, in a computer process, effective pan and tilt angles for at least the lower left and lower right corners of the video feed; converting, in a computer process, the effective pan and tilt angles for at least the lower left and lower right corners of the video feed into Cartesian coordinates in three dimensions defined by the second three-dimensional coordinate system; applying, in a computer process, the rotation to the Cartesian coordinates defined by the second coordinate system to determine Cartesian coordinates in three dimensions defined by the first coordinate system for at least the lower left and lower right corners of the video feed; determining, in a computer process, a view cone using the Cartesian coordinates defined by the first coordinate system for at least the lower left and lower right corners of the video feed and based upon the upper left and upper right corners of the video feed; and displaying the view cone on the map, wherein the Cartesian coordinate systems are centered on the position of the camera and the geospatial location of the camera is known.