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Vertical elevation accuracy not as accurate as using conventional

survey level and rod technique.

Horizontal coordinates are calculated on a rectangular grid system.

However, the real world should be based on a spheroid and

rectangular coordinates must be transformed to geographic

coordinates if projects are large scale.

Examples : highways, large buildings, etc.

As with any computer-based application "Garbage in equals

Garbage out". However, in the case of inaccurate construction

surveys "Garbage in equals lawsuits and contractors claims for

extras."

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13y ago

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