Questions and Answers
What is the purpose of geodetic control surveys?
To establish an accurate positional framework for supplementary surveying and mapping.
Which of the following is a component of a Geodetic Control Network?
Geodetic control surveys are performed to less rigorous accuracy standards than local control surveys.
False
What technology is often used to establish horizontal control in geodetic networks?
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What does vertical control rely on?
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What is required for GPS surveying to be acceptable for vertical control?
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What is the Luzon Datum of 1911?
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Geodetic control surveys serve as primary reference or check points for other subsequent surveys to be used in ___ projects.
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Study Notes
Introduction to Geodetic Control Network
- A geodetic control network establishes an accurate positional framework for nationwide surveying and mapping.
- It involves the precise positioning of stations across an area, accounting for the Earth's curvature.
Geodetic Control Surveys
- Conducted with high accuracy and quality assurance compared to local control surveys.
- Utilizes permanently monumented control points, creating a redundant and interconnected system.
- Essential for monitoring deformations in structures like dams.
Relevance of Geodetic Network
- Influences tenure, value, and various records including resource and administrative records.
- Supports data exchange conventions integrating base maps and parcel-related identifiers.
Components of a Geodetic Control Network
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Horizontal Control:
- Established through permanent or semi-permanent points fixed by triangulation, trilateration, traversing, or GNSS.
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Vertical Control:
- Defined by benchmarks that serve as the foundation for elevation data, typically established through differential leveling.
- GPS is also used, but elevations must be converted to orthometric heights for validity.
History of Geodetic Surveying
- Historical context in the Philippines includes American influence on geodetic practices post-colonization.
Technological Advancement
- Ongoing improvements in surveying technologies enhance precision and efficiency in establishing geodetic control networks.
International Frameworks and Geoid Models
- Global cooperation and standards are integral for the development and maintenance of geoid models, aiding in the accuracy of geodetic networks.
Luzon Datum of 1911 and PRS92
- These frameworks are crucial for precise geodetic referencing and have impacted spatial data management in the Philippines.
Order, Accuracy Standards, and Specifications
- Clearly defined standards for accuracy in geodetic control networks guide the implementation of surveying projects.
Monitoring and Maintenance
- Regular assessments and updates are necessary to ensure the integrity and reliability of the geodetic control network.
Technical Manuals and Guidelines
- Structured manuals provide essential protocols to support geodetic control network operations and standards.
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Description
This quiz covers the fundamental concepts of Geodetic Control Networks. It includes definitions, components, historical advancements, and the international frameworks related to Geodetic Surveying. Discover essential information about the Luzon Datum and the Philippine Reference System.
