steps set up the instrument at a convenient station o1 on the line pr
{"Image DocumentName": "Steps Set up the instrument at a convenient station O1 on the line PR", "Image ImageDescription": "Make the line of collimation roughly parallel to the slope of the ground clamp the telescope. Take a back sight PP\u2019 on the staff held at P. also measure the vertical angle \u03b11 to P\u2019 determine R.L. of P + PP\u2019 Take a foresight QQ\u2019 on the staff held at the turning point Q, without changing the vertical angle \u03b11 . Measure the slope. Distance PQ between P and Q. R.L. of Q = RL of P\u2019 + PQ sin \u03b11 \u2013 QQ\u2019", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}