Comparison of road network positional accuracy between Ahmed’s method and the paper method. (IMAGE)

Beijing Zhongke Journal Publising Co. Ltd.

Comparison of road network positional accuracy between Ahmed’s method and the paper method.

Caption

Twenty feature points were selected on the constructed 2D road network map (Ahmed’s method, Figure 11a) and 3D road network map (paper method, Figure 11b) and used for quantitative evaluation of positional accuracy. Ahmed’s method yielded an average horizontal deviation of 11.318 meters. The 3D road network significantly reduced this horizontal deviation to 4.201 meters and achieved a vertical error of 7.656 meters. The figure shows that the paper method is superior to the Ahmed’s method in the accuracy of horizontal spatial positioning and has acceptable elevation precision. Note that the background map in the figure is sourced from the standard Tianditu Map.

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Beijing Zhongke Journal Publising Co. Ltd.

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