STAR*NET V6 - Circe

Chapter 5 Preparing Input Data
MULTIPLE OBSERVATION DATA TYPES
The “M” Code: Measure - All Measurements to Another Station
Format for 2D Data:
M At-From-To Angle Distance [Std Errs]
Formats 3D Data - Depending on the “Distance/Vertical Data Type” mode:
M At-From-To Angle Slope Dist Zenith [Std Errs] [HI/HT]
M At-From-To Angle Horiz Dist Elev Diff [Std Errs] [HI/HT]
The Measure data type is used for entering all the angular and distance information from
one station to another station in a survey network. The Measure data type can be used
alone to completely define a network, or it can be used along with any other data type
discussed in this chapter. It is particularly useful when used along with the Traverse data
type discussed later in this chapter to add in extra shots and cross ties.
The Measure data line contains the three station names used for the measurement in
either an At-From-To or From-At-To order, as specified in the Project Options. Measure
data includes ALL observations required to completely define another station, a turned
angle, a distance, and if entering 3D data, a vertical observation. The distance and
vertical information in 3D data may be either a Slope Distance and Zenith Angle, or a
Horizontal Distance and an Elevation Difference, depending on the setting of the
“Distance/Vertical Data Type” option in the Project Options/General dialog. The mode
of the “Distance/Vertical Data Type” can also be changed anywhere in your data file by
using the “.DELTA ON/OFF” inline option. See “Using Inline Options” later in this
chapter for details.
If a descriptor is added to the end of a measure line, it is assigned to the “TO” station.
For simplicity, the examples below all use the At-From-To angle format.
Example 1: (2D Data)
M 2-1-3 12-34-13 1102.42 ‘Found Iron Pipe
The horizontal angle at station “2”, backsighting station “1” and turning clockwise to
station “3” is 12-34-13, and the horizontal distance from “2” to “3” is 1102.42. Default
standard error values are assumed for both.
59