ugg milano Free station Principle and Application

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Liberal Theory and Application station

* 47 * assuming any necessary initial data,,, calculated assuming coordinates (,) and (,[link widoczny dla zalogowanych],), then according to (, Y), (, Y /) and (, Y), (, Y ), calculated transformation parameters, which have r formula is as follows: Suppose coordinates: = + s ~ cos (180. ± y), Y port = s ~ sin (180. ± y) (As, B3 point clockwise arrangement of tense of taking \Σ. Accuracy evaluation is used here lead indicators,[link widoczny dla zalogowanych], plant, to some extent represents the difference with the full closure to measure the relative accuracy is more intuitive, for, according to the literature [3】, the tolerance level of Traverse using the same 0.7 times as appropriate. 2 example in Figure 1, = 5000.000m, Y = 5000.000m,[link widoczny dla zalogowanych], = 5000.000m, Y at = 8214.330m, Sa = 2146.730 ± 0.014m,[link widoczny dla zalogowanych], s = 2707.582 ± 0.021m, y = 82. 0303.2 ± 2.0. Calculation results are as follows: indirect adjustment method: = [6790.9277030.673],[link widoczny dla zalogowanych], m = ± 1.46cm, m = ± 1.56cm. Condition adjustment method: ? = [82. 0304.272707.59222146.7333】, m = ± 1.46cm, then = 6790.927m, Y, = 7030.674m. Coordinate rotation method: = 6790.937m, = 7030.672m, K = 1 / 25000, m = ± 1.90cm. 3 The results show that adjustment of indirect observations and conditions of the adjustment is completely equivalent. The former law evident, Q array easy to find, easy on the computer programming; the latter only an adjustment of condition equations, eliminating the need for a greater amount of matrix calculations, the calculator can be programmed to achieve. Adjustment of coordinate system rotation than the general approximation of high accuracy, small steps, checking the conditions are fully realized in the calculator. 3-bit application site selection of Free Introduction convenient conditions for the existence check to prevent gross errors, both to overcome the problem of resection dangerous circle, but also to make up for the lack of Intersection. Operation, and sometimes do not have to set the point mark, omit the instrument on, the save time. Test site for the coordinate points, the other problem solved, you can start the corresponding follow-up. Normal production practice, often observed two known points can meet the accuracy requirements. Such as general construction setting out, point measurement, free station has a high practical value. If you are using Total Station (or semi-station instrument) there is no such module, with the choice of programming calculator with coordinate rotation method coordinates Quick Solution to achieve, but also to free station. If you are using total station with free station modules, in accordance with the principle of observing all the elements, total station will automatically calculating coordinates.
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