GELE Geodesy — Geodetic Datums and Coordinate SystemsSlides
Geodetic Datums and Coordinate Systems slides, sized for screen and print. Flip through them for a five-minute pre-mock refresh, or print the deck for on-paper annotation. Either way, the slides cover Geodetic Datums and Coordinate Systems at the depth Professional Regulation Commission (PRC) — Board of Geodetic Engineering tests for the GELE 2026.
Exam context
Professional Regulation Commission (PRC) — Board of Geodetic Engineering runs the Geodetic Engineer Licensure Examination on September 2026. Its Geodesy section sits under a "Core" weighting, and Geodetic Datums and Coordinate Systems is the 2nd chapter in the 6-chapter GELE Geodesy rotation. The GELE passing mark is 70% weighted average, no sub-test below 50%, and the most recent 2026 paper drew about a meaningful share of questions from Geodesy.
Geodetic Datums and Coordinate Systems - Slides
Slides
Introduction to Geodetic Datums
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S1
Geocentric vs. Local Datums
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S2
Philippine Datums: PRS92 and Historical Context
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S3
Ellipsoids and Their Properties
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S4
Geodetic Coordinates: Latitude, Longitude, Height
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S5
Cartesian Coordinates: X, Y, Z (Geocentric)
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S6
Projected Coordinates: Easting and Northing (UTM/PPCS)
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S7
Three Coordinate Types Summary
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S8
Datum Transformation Fundamentals
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S9
Three-Parameter Datum Transformation
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S10
Seven-Parameter Datum Transformation
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S11
Worked Example: 3-Parameter Shift
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S12
Worked Example: Scale Factor Effect in 7-Parameter Transform
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S13
GPS to PRS92 Transformation Workflow
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S14
Common Errors and Pitfalls in Datum Work
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S15
Key Formulas and Quick Reference
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Exam Strategy: Datum and Coordinate Questions
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Philippine Legal and Standards Framework
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Datum and Coordinate Transformation in GIS and Surveying Software
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S19
Summary: Geodetic Datums and Coordinate Systems
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S20
Stored In
chapter_slides
Slide Count
20
Summary Only
true
Previous chapter
Figure of the Earth and the Reference Ellipsoid
Next chapter
Geodetic and Cartesian Coordinates
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