Mapping method of aerial photogrammetry

The methods of drawing mainly include comprehensive method, all-round method and division of labor (difference method). Synthesis method is a mapping method combining photogrammetry with flat panel, which belongs to single photo mapping. According to the corrected aerial photograph, the plane position of the ground point is determined, and the elevation and contour line of the ground point are measured by the flatbed car. Suitable for large-scale mapping in flat areas. Omni-directional method is a method of putting stereo images in a stereo plotter to form a reduced geometric model of the ground, and measuring the plane position, elevation and contour lines of ground points on the stereo model to obtain topographic maps, which is mainly suitable for mountainous areas. Division of labor is a drawing method based on the principle of dividing plane and elevation. The elevations of ground points and contour lines are measured on three-dimensional surveying and mapping instruments. The determination of the plane position of ground points is the same as the comprehensive method, which is suitable for hilly areas.