【正文】 possible, after the point of view from the plane farther from the site as possible, under normal circumstances, after the two sites and between the point of view Put up a station should not be less than the distance to the distance between the measuring point, so to ensure accuracy.3) In the measurement of coordinates do not bring down the mirror, because the whole point Miriam core essence of the coordinates of law or by the declination, the distance obtained internal calculation by the total station data processing modules are converted into coordinates, so bring down the mirror coordinate system is equivalent to rotating the whole 180176。, that is to say less biased angle of 180176。, the result of course is wrong.4) Total height measurement has its limitations, the measurement error of the main elevation of the observation error for the vertical angle, ranging error, apparatus, high With high measurement error of the prism, which is three kinds of errors in vertical angle observation the impact of the error the most, only to take appropriate measures to improve the accuracy of observation, such as the use of spy license allowed the goal to replace the prism as the appropriate measure to increase the number of shortdistance transmission of elevation, carefully check the amount of high equipment and higher prism. Under normal circumstances, traversing the measuring point in the elevation values for reference only, and can not be used as the standard of measurement. Station in the center line Measurement(1)put up a station in the location of choiceAs far as possible to select those higher, depending on the conditions of a good pass, you can see more points in the online position. We have just started using Total Station, when not paid much attention to this point, the results tend to move off station More, not only affect the progress, but also accuracy. Especially in mountainous areas, such as on top of a mountain we can see a few kilometers around the location in the pile, and along both sides of the road often requires several stations put on a station can only be deposited end of this set up the center line. Another example is the middle of the mountains edge streamlet actinomycete line, as the horizontal alignment is often not ideal, many hills to block line of sight, always need to stop several times to move, if we choose to route the other side of the river the mountain. The ground floor or the roof of the residents do, such as the location for put up a station can be highly effective.(2) points fewer processingTotal Station, as the barrier encountered by the laying of the center line, in the case of small points should be taken from the machines can see the most recent release Points (generally not in the line of points) for the reference approach. Routes in the mountains and the obstacles were more buildings, and sometimes moving equipment will take a 12 point move is often no longer the other stations. But with the mobile reference point and reference point for measuring a bination of methods, each has made to save time, effort, and the results meet the accuracy requirements.(3)Total Measurement Application of functional skillsAlthough the level of total station measurements cumbersome procedures, and accuracy is not high, but sometimes the function of height can be measured effectively. As in Mountain edge streamlet line measurement of change, some routes in several midline point on the mountain, if measured by leveling to the elevation of these points, based on past experience, Level turn to the hilltop after two previous instruments Easily lead to error is too large, resulting in closure between the standard points. Our approach is: in the mountains at the foot of the election of a fixed reference point for parison, With total station read out the points of Zaxis height, and then release with Total Station in the midline point of these hills, when they point the way to measure the Zaxis height can be calculated in relation to these points, the reference point the foot of the hill. The elevation, so that measured by leveling the height of the reference point, coupled with the height difference between them, they will have the hills on the center line of the elevation point of the mountain at the same time, the way to avoid leveling easily lead to the standard of the hill between the occurrence of nonclosure.(4) Total Station with other measurement methods used in conjunctionMeasuring Total Station can be centerline to improve the measurement speed, but because of its own measurement of the use of the mechanism of making it have some limitations, such as the barrier, when, as often required when moving points, in particular Measurement in the plains, as station equipment to move a lot of time to delay, the impact of the measurement. In fact, the process of laying the center line does not necessarily have to rely too much on total station, in conjunction with the previous tape under a flower, “wear bar” Law. We microhill in the plains areas, especially in areas with more line segments, the method of measuring the center line is: only used to take control of Total Station Point, that is, line segments, one for every 300m center line, the curve point above the center line of the release by the Total Station, straight from the points A, B 2 personal expertise lay in front of the middle group, after the laying of A continue to the front 300 m A Department Total points also to the well，B to A，as the Department beforethe legislature，A continues to move forward，it can be the middle of Total Stationthrough the walkietalkie Midline group to review their use of “under law to wear”the point very important point is:Total removal of the time points chosen the best straight Segment on the benefits of such a group is not waiting for equipment to move the center line and layoff use this method in 23 provincial line Nanyang City of Henan Dengzhou Habitat Bang