This Tripod has too much play in it to support a Total Station. The reason for this poor resection setup was the tripod he was using had too much play in the joints near the head of the tripod. I would expect to have a 3d quality of less than 10mm for setting out works. The 3d quality is a measure of the accuracy of the resection, the greater the number the worse your resection is. After several attempts at setting up a resection and only getting a 3d quality of 35mm, much greater than the quality required for this type of work. Using the same site control stations that I have been using (see the guide to doing a resection) he was not able to get an accurate resection. He was using a Robotic Leica TS16 Total Station and was doing his first resection on the site with it. Recently, an engineer joined me on a construction site. If your tripod is not in good condition this can seriously affect the accuracy achieved when using a Total Station. The total station but also the collimation height of the total station. This will not only affect the plumbness of Tarmac can become soft and the tripod feet can sink into the tarmac. Support the instrument in colder weather, but in warm and sunny conditions the It is worth pointing out that tarmac may well Will support the tripod and total station throughout the working task. The tripod should also be setup on firm, stable ground that See how putting pressure on a tripod affects the level of a Total Station. Weight through the tripod can have a serious effect on the accuracy from the Now that we can see the effect that some light pressure on the tripodĬan have on the total station it should be evident that holding and putting This tripod is in good condition and isĬapable of supporting the total station in use. Pressure being applied to the tripod on the level of the total station. Take a look at this video which shows the effect of light Remember, never use an aluminium tripod for Sturdy enough for supporting the total station can be found here.
A quick and easy test to see if your tripod is The tripod should be sturdy enough to support the weight of the total Tripod is most certainly the most overlooked item of equipment that can lead to The Tripod that your total station is mounted on is the 1.) Make sure your tripod is in good condition. The measured Eastings, Northings and Elevations. In this case when using a Total Station, how close together are Precision refers to how close repeated measurements are
Northing and Elevation to the true value. In this case when using a Total Station, how close is the Easting, What is accuracy and precision in surveying?Īccuracy refers to how close the measurement is to the Of all, let’s remind ourselves of what accuracy means in surveying. With all of what will be said below it is important to remember that the more accurate you want your results to be, the more time you need to spend to reduce the errors present in order to get the most accurate results. They are in some order of the significance that they have on the potential accuracy that can be achieved with a Total Station whilst setting out or surveying. Some might surprise you and others may not be a factor for you at all. In this article I shall be identifying what can severely impact the accuracy that can be achieved when using a total station.
Do you know what the greatest errors to affect Total Station accuracy are? But even the most accurate of Total Stations can give inaccurate results if the ancillary equipment used with them is in poor condition, not adjusted properly or used poorly. Most Total Stations on construction sites have an angular accuracy of five seconds or less and a distance accuracy within a couple of millimeters. But what are the greatest errors to affect total station accuracy? When buying or specifying a Total Station we often only concentrate on the accuracy of the Total Station. Total Stations are very accurate pieces of equipment that are very expensive.
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