TECHNICAL REPORT
COMMENT SAI NET RESULTS fiber transmission lines 2 - HIGH TECHNOLOGY
I. Ground control network level 2 pass
I.1. Work selected points, buried markers
On the basis of the technical requirements, the survey unit and bury selected new pass mark 05 Level 2 are numbered as follows: DC73A, DC74A, DC75A, DC79A, DC79B. The mold is cast in place concrete, ceramic mold heart dimension 20x20cm, bottom 30cmx30cm, height 40cm.
connection Grid is designed to measure ground coordinates, altitude based on Grade 02 mark IV include: GPS-05 , GPS-05B.
I.2. Measured net
* Test equipment:
Unit using electronic total station SET-510 with accuracy m = 05 ''; ms = 3mm + 2pmm to measure angles grid level 2. Before measuring, the device was checked and corrected.
* The process and methods of measurement:
+ Angle: 3 rounds measure
measured edge: 2 forward direction inverse (measuring travel and measure on).
+ measurement error: Obey Technical indicators grid level 2 pass
high measured trigonometric.
I.3. Calculation and adjustment of the measurement results
The measured field data is put into a computer to conduct adjustment by the method of least squares.
II. High technical grid
II.1. Work selected points, buried landmark
milestone of grid The high technical control was located milestones pass level 2, not bury its own mold.
nets designed altitude graph that matches high point IV class calculated as starting point.
II.2. Measured net
* Test equipment:
Using its B40 SOKKIA Japan with MX = 24x and MKM 2mm aluminum 4m same pair mia incised 1 side.
* The process and methods of measurement:
high technical Grid shall comply with the technical regulations of the Department 96 BC 43-90 geodesic map (now the General Administration).
II.3. Calculation and adjustment of the measurement results
Grid Technical altitude adjustment is calculated according to the indirect method of adjustment on the computer using a preset program
II.4. The system coordinates and altitude using:
flat projection UTM coordinates (national reference system VN 2000), the meridian axis 1050 45 ', projection zone 30
State System HN1972 height (Hon Dau - Son - Hai Phong)
III. Conclusion
Grid pass Level 2 - high technical quality and altitude coordinates of good, qualified to perform the work of topographical mapping service construction drawing design and construction layout Construction.
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