Spectra-precision Survey Pro v3.80 Ranger GPS User Manual Manuel d'utilisateur télécharger pdf (Page 50)

GPS User’s Manual

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Geometry of control points: the control points should be

distributed evenly surrounding the survey area.

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Check points: after solving for localization parameters with a

minimum number of control points, you should occupy an

independent checkpoint to verify the solution quality. If you

desire, this point can be added as a control point and used for

subsequent solutions. If the checkpoint measurement is within

the tolerance, this step should not be necessary.

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Redundancy and residuals: After solving localization parameters

with more than the minimum number of control points, you

should examine the solution residuals. The residuals should be

close to the measurement precision of your instrument and the

control points.

Fig. 10: Good Control Point

Geometry

Three control points surround the

project area.

Fig. 11: Poor Control Point

Geometry

Three control points in one corner of

the project area. Also, for vertical

localization, the three control points

are close to co-linear.

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Spectra-precision Survey Pro v3.80 Ranger GPS User Manual Manuel d'utilisateur Page 50