Share Email Facebook Twitter LinkedIn Least Squares Formulas Topics in this section About the Least Squares Algorithm About Horizontal Survey Adjustment About Distance Observation Equation Geometry About Angle Observation Equation Geometry About Azimuth/Bearing Observation Equation Geometry About Weighted Observations About Chi-Square Value and Goodness-of-Fit Test About Standard Deviation Computations About Error Rectangles and Ellipses About Standard Error Rectangle and Ellipse Geometry Parent topic: Survey Analysis