<?xml version="1.0" ?>
<!DOCTYPE gama-xml SYSTEM "gama-xml.dtd">

<gama-xml version="2.0">
<network>

<description>
Edward M. Mikhail: Observations and Least Squares, 1976, ISBN 0-7002-2481-5

Example 7.4: Adjustment of a Level Net (p. 147)
</description>

<!-- parameters  sigma-apr="60" / -->

<points-observations>

<point id="A" z="800.000" fix="z"/>
<point id="B"             adj="z" />
<point id="C"             adj="z" />
<point id="D"             adj="z" />
<point id="E"             adj="z" />

<!--
      <point id="B" z="825.220" />
      <point id="C" z="835.535" />
      <point id="D" z="809.535" />
      <point id="E" z="830.846" />
 -->

<height-differences>
  <dh from="A" to="B" val=" 25.42" dist="18.1" />  <!-- dist. in km -->
  <dh from="B" to="C" val=" 10.34" dist=" 9.4" />
  <dh from="C" to="A" val="-35.20" dist="14.2" />
  <dh from="B" to="D" val="-15.54" dist="17.6" />
  <dh from="D" to="E" val=" 21.32" dist="13.5" />
  <dh from="E" to="C" val="  4.82" dist=" 9.9" />
  <dh from="E" to="A" val="-31.02" dist="13.8" />
  <dh from="C" to="D" val="-26.11" dist="14.0" />
</height-differences>

</points-observations>

</network>
</gama-xml>


