By W. Schofield

A vintage textbook supplying a complete creation to the subject for HNC/D scholars. This booklet combines Schofield's past books in a single quantity, completely revised and up-to-date all through with new fabric on themes similar to worldwide Positioning satellite tv for pc platforms, electronic levelling, land/geographic details systems.

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6789 m, this also checks with the sum of the second and third values given above. Note. e. e. the weight is inversely proportional to the length of the line levelled. (2) The problem could have been just as easily worked out by the method of condition equations, in which case the conditions would have been (a) Circuit ABCDA should close to zero. (b) Circuit BCDB should close to zero. (c) Circuit ABDA should close to zero. e. '. 19. 2" Find, by the method of least squares, the most probable values of angles w, x, y and z.

3 = —15 mm — i?! *. *. 6789 m, this also checks with the sum of the second and third values given above. Note. e. e. the weight is inversely proportional to the length of the line levelled. (2) The problem could have been just as easily worked out by the method of condition equations, in which case the conditions would have been (a) Circuit ABCDA should close to zero. (b) Circuit BCDB should close to zero. (c) Circuit ABDA should close to zero. e. '. 19. 2" Find, by the method of least squares, the most probable values of angles w, x, y and z.

E. ±σΕη9 ±σΝη, However, the control point in question may have a standard error greater than σΕ or σΝ, in some other direction (φ). This dimension is referred to as the 'semi-major axis of the error-ellipse' (±tfmax), and the semi-minor axis (±

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