Trav Calc Intructions PDF

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TRAVERSE CALCULATIONS REDUCING FIELD NOTES 1) Reduce all Horizontal Angles on Field notes. 2) Reduce vertical angles read in TWO faces first. Calculate the mean vertical angle. From this/these result/s calculate the vertical circle index error. Apply the vertical circle index error to observed vertical circle readings made in only one face to get a mean vertical angle for every sloped distance measured. 3) Prepare a Field Notes Sketch where you must show every HORIZONTAL ANGLE as observed. Also show every observed distance and its slope angle (or write HOR, if step chained) 4) Calculate the angular misclose. Sum internal angles and compare to 180o. If need be, draw a separate diagram to show the internal angles rather than complicate your field notes diagram. 5) Prepare a second sketch (to be called Calculation Information) to show bearings and horizontal distances. This will be used in the traverse calculations. 5a) Adjust the internal angles to close to exactly 180o. Remember that although theory says adjust every angle equally – work to observable limits, i.e. 10”, to be the smallest unit when adjusting an angle. Thus a misclose of 50” should be adjusted by 20”, 20” and 10”, NEVER 16.667” or 16”, 17”, 17”. 5b) Only the internal angles can be adjusted. The angle between the Azimuth, (UTS Tower) and your first traverse station (call it the ‘azimuth angle’) can NOT be adjusted and must stay as observed. 5c) Find the azimuth for your traverse station from the list on P17 of the field notes instructions. Apply the azimuth angle to this to get a bearing to your first traverse station. Apply your adjusted internal angles to this bearing to get the bearings of the other two traverse lines. 5d) Reduce all observed distances to horizontal. 5e) Show the bearing and horizontal distances for each survey line, including the radiations, on the second sketch called “Calculation Information”.

TRAVERSE CALCULATIONS Use the traverse calculation from provided (or from UTSOnline) Transcribe data (carefully) from the Calculation Information Diagram to the traverse calculation table. NOTE THE DIRECTIONS OF THE LINES on the traverse table. You may need to reverse some bearings. You MUST list your bearings in the directions as shown on the form. Calculate the traverse close and coordinates. Transcribe the coordinates for your L and R points to then get the coordinates of the radiated points Drains 1 and 2. Calculate the missing bearing and distance between Drain 1 and Drain 2.

Remember that in real life, the traverse lines would be much, much longer than these ones and in between Drain 1 and Drain 2 would be numerous obstructions preventing a direct measurement....