27.03.2013 Views

STAR*NET V6 - Circe

STAR*NET V6 - Circe

STAR*NET V6 - Circe

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Example 1:<br />

E 301 982.53<br />

Chapter 5 Preparing Input Data<br />

Station “301” is assigned an elevation of 982.53. No standard error values or fixity<br />

symbol is entered, so the elevation will be assumed completely free to be adjusted.<br />

Example 2:<br />

E 302 845.25 ! ‘Benchmark 105<br />

Station “302” is assigned an elevation of 845.25. This elevation will be held fixed.<br />

Example 3:<br />

E Doug 1256.5 0.015 ‘GPS E007<br />

An elevation for “Doug” is entered with a given standard error. The elevation will be<br />

considered an observation. It will be counted in the statistics and will show up in the<br />

“Adjusted Observations and Residuals” section of the output adjustment listing file.<br />

Using “CH”, “PH” and “EH” Codes: Specifying Ellipsoid Heights<br />

This entry is for 3D grid data:<br />

CH Station North East Ellipsoid Height [Std Errors]<br />

This data type causes the entered elevation value to be taken as an ellipsoid height rather<br />

than an orthometric elevation. The data format is identical to the “C”, “P” and “E”<br />

formats, except the appended “H” causes the alternate interpretation of the elevation<br />

value. This data type is particularly useful in the <strong>STAR*NET</strong>-PRO edition where<br />

ellipsoids heights are commonly used in networks containing GPS vectors.<br />

Example:<br />

PH 335 33-22-44.123 120-24-41.122 835.32 ! ! ! ‘GPS BM335<br />

Point “335” has given latitude and longitude values, plus an ellipsoid height of 835.32.<br />

See Chapter 10, “Adjustments in Grid Coordinate Systems” for more details on grid<br />

systems, and the use of ellipsoids heights and orthometric elevations.<br />

53

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!