手持机为什么坐标转换（Why is the hand holding machine converted）.docVIP

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手持机为什么坐标转换（Why is the hand holding machine converted）.doc

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手持机为什么坐标转换（Why is the hand holding machine converted）

手持机为什么坐标转换（Why is the hand holding machine converted） The difference between the two coordinate systems is the DX, DY and DZ coordinate system. The DA is the difference between the two coordinate systems. After the above operation is completed, with GPS receiver, respectively, the coordinate of the triangle, and based on the observations and the known coordinates the difference of their value, and take the average value as the DX, DY, DZ correction value (for GARMIN company produces series of hand-held locator currently on the market in addition to the crown, looking forward to two kinds of models with high pressure, the rest of the several models of GPS height measurement, the precision is low, cant use, so DZ can be set to 0, also can be set to the correct number of DZ, has no effect on other parameters Settings are correct or not), the correct number as a reference only at this time. Step 2: In the observations of triangle points of the parameters of the receiver will be DX, DY, DZ set to have made the correct number, DA, DF, set to the corresponding difference, namely a (84) - a (54) = DA = - 108, the alpha (84) - alpha (54) = DF = 0.0000005, or a (84) - a (80) = 3, alpha (84) - alpha (80) = 0 The coordinates of the known points are observed at the same triangle point, and the second new correction number is added to the DX, DY and DZ according to the observations. At this point, the second with a GPS receiver measuring coordinates of all known points to the second correction, until the coordinate values close to the known GPS receiver observation point coordinates, the difference is less than 5 meters, take the observations and the known coordinates of each point of the difference of average, as a final correction for DX, DY, DZ, the operating cycle to the second commonly can get ideal correct number. 3. Parameter setting and operation method 1. Turn on the power Press the page key to enter the menu screen Press up and down to set Press enter to enter