Control Network AdjustmentDefinition: Control network adjustment is a crucial process in surveying. It involves processing the observed data of a control network to obtain more accurate parameters such as point coordinates.Principle: By using methods like the least squares method, it eliminates observational errors and improves the accuracy of the control network.Steps:1. Observation data collection from control points.2. Formulation of the error equations based on the geometric relationships in the control network.3. Application of the least squares principle to solve for the unknown parameters (coordinates, etc.).Importance: It provides a more accurate basis for subsequent surveying and mapping work, ensuring the precision and reliability of the overall spatial data.