2.9 Directions

Directions are expressed with the following attributes in an empty-element tag <direction />

• to = "…" target point identification
• val = "…" observed direction; see section Angular units
• stdev = "…" standard deviation (optional)
• from_dh = "…" instrument height (optional)
• to_dh = "…" reflector/target height (optional)

The standard deviation is an optional attribute. However since all observations in the adjustment must have their weights defined, the standard deviation must be given either explicitly with the attribute stdev="…" or implicitly with <points-observation direction-stdev="…" > or with a variance-covariance matrix for the given observation set. A similar approach applies to all the observations (distances, angles, etc.)

Example

<direction  to=  "2" val="0.0000"  stdev="10.0" />
<direction  to="416" val="63.9347" />

This document was generated by Ales Cepek on June 5, 2013 using texi2html 1.82.