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Multiple Choice

What is the maximum azimuth error of Polyconic projection?

Azimuth error tells you how far directions on the map can deviate from true bearings on the ground. In the Polyconic projection, directions are not preserved because the projection constructs each parallel on its own cone, causing angular distortion to accumulate as you move away from the central area. Because of this, there is a known maximum amount by which a bearing can be off when using this projection, and that value is about 1 degree and 56 minutes. This is why the figure 1°56' is the best answer among typical reference values. The smaller figures would imply near-perfect direction preservation, which Polyconic does not achieve, while a full 2 degrees is a rounded-overestimate of the true maximum.

Azimuth error tells you how far directions on the map can deviate from true bearings on the ground. In the Polyconic projection, directions are not preserved because the projection constructs each parallel on its own cone, causing angular distortion to accumulate as you move away from the central area. Because of this, there is a known maximum amount by which a bearing can be off when using this projection, and that value is about 1 degree and 56 minutes. This is why the figure 1°56' is the best answer among typical reference values. The smaller figures would imply near-perfect direction preservation, which Polyconic does not achieve, while a full 2 degrees is a rounded-overestimate of the true maximum.