13. Errors and Adjustments
The chapter covers the significance of understanding errors in Geo-Informatics, emphasizing their classification, propagation, and adjustment techniques to ensure data accuracy and integrity. It discusses different types of errors—systematic, random, and gross—and how they impact data quality. Additionally, it outlines methods for error adjustment, statistical testing, and the role of technology in enhancing measurement reliability.
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What we have learnt
- Errors in geo-informatics can be classified into systematic, random, and gross errors, each with unique characteristics.
- Understanding and applying error propagation and adjustment methods is crucial for achieving high data accuracy.
- Technological tools and adherence to international standards can significantly streamline error detection and adjustment processes.
Key Concepts
- -- Systematic Errors
- Predictable errors due to calibration faults or procedural flaws that can skew data consistently in one direction.
- -- Random Errors
- Unpredictable errors caused by various factors, which can vary in magnitude and direction, making them challenging to control.
- -- Adjustment Techniques
- Mathematical methodologies used to minimize the effects of errors in measurements to improve reliability, including the Least Squares method.
- -- Error Propagation
- The process of determining how input data uncertainties impact the final results of computations in geospatial analysis.
- -- Global Navigation Satellite Systems (GNSS)
- Systems like GPS that can experience various errors, which can be corrected through techniques such as Differential GNSS and Real-Time Kinematic.
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