3/. The Survey Course - University College London

More documents

Recommendations

Info

under the tribrach of the total station that attaches to the tripod. The 1200,800 and 700 series total stations have a laser plummet. Once the machine is attached to the tripod turn the machine on. It should default to a levelling and laser plummet screen (this action will depend on internal settings). The laser plummet will appear as a red dot beneath the total station. Carefully move the tripod until the laser plummet is located over the control point. Turn the thumbscrews until the plummet is central over the survey point/nail. Heel the tripod in so that it is stable (it does not to be underground) 4. Centre the laser plummet again; turning the thumbscrews does this. 5. Now use the spirit level on the tribrach to level the tripod. Level the tripod by adjusting the legs. The thumbscrews should be used for fine adjustment only. 6. Once you have it level, the laser plummet will have moved away from the survey point. Use the thumbscrews to re-centre the plummet. The tripod will need levelling again (with the tripod legs) but should need to make smaller adjustments. 7. Eventually you will have the tripod level with the plummet nearly directly over the survey point. To make the final adjustment then loosen the screw that holds the tribrach to the tripod. You should only have to move the plate a small distance to centre the plummet. Re- level with the thumbscrews (this action should only involve a small adjustment). 8. Finally level the machine using the electronic level. This will appear as a horizontal and vertical bar or as a pictorial representation of a bulls eye spirit level (depending upon the machine used). 9. Exit out of the levelling screen. 28
10. The height of the total station must now be measured. The height should be from the ground to a mark on the side of the total station that corresponds to the centre of the telescope. Keep the tape measure as straight as possible. The height should be recorded to the nearest millimetre. Record the height in your notebook. 11. The total station is now ready to work. We shall learn how to use the system programmes in the field. Appendix 2. Scheduling description for SAMs 20032 – 31207: Round barrows and cross dykes. (CD=Chichester District) DISTRICT HER NUMBER: CD1753 Name: Bowl barrow - Heyshott Down Monument Type: BOWL BARROW Period From: Bronze Age Narrow Type: Period To: Monument Type: BARROW CEMETERY Period From: Bronze Age Narrow Type: Period To: Status: Scheduled Ancient Monument (SAM) Grade/Ref: 20032 Prev Grade/Ref: 224a Parish: Heyshott Map Sheet: SU91NW NGRX: 490583 NGRY: 116579 Remarks: A group of nine bowl barrows on Heyshott Down was listed in 1934. Barrow A was 21 paces in diameter and 6ft high, with a hollow centre {1}. In 1971 all except H were under rough pasture and only B showed any trace of ditches. Barrow A was 20m in diameter and 2m in height, with a central excavation crater {2}. By 1975 the barrows had been cleared of scrub and were under rough pasture {3}. CD1753 is the westernmost barrow of an E-W linear cemetery of 10 round barrows situated along a chalk ridge towards the N of the South Downs. These all survive as earthworks and range in size from 11-34m in diameter and 0.3-2.60m high. Seven barrows have hollows and disturbances suggesting that they were once partially excavated. CD1753, a bowl barrow, has a mound 19m in diameter and 2m high. Surrounding the mound is a ditch which has become in-filled over time and is now only visible as a slight depression to the SE but survives as a buried feature c. 3m wide around the mound. Scheduling revised, Barrow 1 {4}. {1} Sussex Barrows Date: 1934 Author: Grinsell, L.V. Journal/Serial: Sussex Archaeological Collections Volume/part: 75 Specific Ref p.246 {2} SU91NW19 (OS Record card) 29
Page 1 and 2: INSTITUTE OF ARCHAEOLOGY, UCL ARCL
Page 3 and 4: List of figures Cover Page. Contour
Page 5 and 6: 1/. Background This year’s survey
Page 7 and 8: Fig. 3a. Detail from the 1874 25inc
Page 9 and 10: Fig. 4. Geological map, showing str
Page 11 and 12: The site is situated on the crest o
Page 13 and 14: The known monuments to be surveyed
Page 15 and 16: Fig. 10. LISCAD generated model of
Page 17 and 18: In addition to the Total Station su
Page 19 and 20: 3/. The Survey Course (General) Aim
Page 21 and 22: Workload The initial five-day field
Page 23 and 24: any accident. If you become aware o
Page 25 and 26: Curwen, E.C., 1918. Covered Ways on
Page 27: Seager-Thomas, M., 2008. From potsh
Page 31 and 32: Specific Ref {4} EH Revised Schedul
Page 33 and 34: Remarks: A group of nine bowl barro
Page 35 and 36: Journal/Serial: Sussex Archaeologic
Page 37: Appendix 3 Students attending the s

3/. The Survey Course - University College London

Create successful ePaper yourself

Delete template?

Save as template?