Global Positioning System Reference
In-Depth Information
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discrepancies depend on the specifications of the mappings. The figure shows an
optimal situation because the circle is centered at the origin of the Lambert conformal
mapping and at the central meridian of the Mercator mapping. With
k
0
=
1 the area
around the center of the circle has the least distortion and the similarity model fits
relatively well.
Figure 9.17 shows discrepancies for different locations of the geodesic circle
within the mapping area while the radius remains constant at 10 km. For line 1 (LC),
the standard parallel of the Lambert conformal mapping shifts from 45° to 46° while
the center of the geodesic circle remains at latitude 45°. In the case of line 2 (TM),
the center of the geodesic circle moves from 0° to 1° in longitude while maintaining
a latitude of 45°.
[La
[33
Lin
—
4
——
No
PgE
[33
