18-Geom-A3 Geodesy and Positioning
Worked solutions to 4 past sittings (2014–2018), 29 questions. Pick a sitting, or start from a topic below.
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Confidence Ellipses (4 sittings): December 2018 Q6 · December 2017 Q6 · May 2015 Q6 · December 2014 Q6
- Coordinate Systems (4 sittings): December 2018 Q1 · December 2017 Q1 · May 2015 Q1 · December 2014 Q1
- Datums (4 sittings): December 2018 Q1 · December 2017 Q1 · May 2015 Q1 · December 2014 Q1
- Height Systems (4 sittings): December 2018 Q3 · December 2017 Q3 · May 2015 Q3 · December 2014 Q3
- Map Projections (4 sittings): December 2018 Q4 · December 2017 Q4 · May 2015 Q4 · December 2014 Q4
- Network Post-analysis (4 sittings): December 2018 Q6 · December 2017 Q6 · May 2015 Q6 · December 2014 Q6
- Reference Frames (4 sittings): December 2018 Q1 · December 2017 Q1 · May 2015 Q1 · December 2014 Q1
- Brief Definitions (3 sittings): December 2018 Q7 · December 2017 Q7 · December 2014 Q7
- CGVD2013 (3 sittings): December 2018 Q3 · December 2017 Q3 · December 2014 Q3
- CGVD28 (3 sittings): December 2018 Q3 · December 2017 Q3 · December 2014 Q3
- Ellipsoids (3 sittings): December 2018 Q6 · December 2017 Q6 · December 2014 Q6
- Geoid (3 sittings): December 2018 Q2 · December 2017 Q2 · May 2015 Q7
- Gravity Field (3 sittings): December 2018 Q2 · December 2017 Q2 · May 2015 Q7
- ITRF (3 sittings): December 2018 Q5 · December 2017 Q5 · December 2014 Q5
- Satellite Positioning (3 sittings): December 2017 Q5 · May 2015 Q5 · December 2014 Q5
Questions by sitting
December 2018
- Question 1: Coordinate Systems, Reference Frames and Datums
- Question 2: Gravity Field and Geoid
- Question 3: Height Systems — CGVD28 vs CGVD2013
- Question 4: Map Projections — Elevation Factor and Laplace Correction
- Question 5: Space Geodetic Positioning — WGS84, ITRF and VLBI
- Question 6: Network Post-analysis — Confidence Ellipses and Ellipsoids
- Question 7: Brief Definitions
December 2017
- Question 1: Coordinate Systems, Reference Frames and Datums
- Question 2: Gravity Field and Geoid
- Question 3: Height Systems — CGVD28 vs CGVD2013
- Question 4: Map Projections — Elevation, Scale and Grid Factors; MTM
- Question 5: Satellite Positioning — WGS84, ITRF and GPS-PPP
- Question 6: Network Post-analysis — Confidence Ellipses and Ellipsoids
- Question 7: Brief Definitions
May 2015
- Question 1: Coordinate Systems, Reference Frames and Datums
- Question 2: Computations of Positions on the Ellipsoid
- Question 3: Height Systems
- Question 4: Map Projections
- Question 5: Satellite Positioning
- Question 6: Network Post-Analysis — Confidence Ellipses
- Question 7: Gravity Field and Geoid — Stokes’s Formula
- Question 8: Definitions / Descriptions
December 2014
- Question 1: Coordinate Systems, Reference Frames and Datums
- Question 2: Computations of Positions on the Ellipsoid
- Question 3: Height Systems — CGVD28 vs CGVD2013
- Question 4: Map Projections — Grid Factor, Convergence, UTM/MTM
- Question 5: Satellite Positioning — WGS84, ITRF, PPP and RTK Networks
- Question 6: Network Post-analysis — Confidence Ellipses and Ellipsoids
- Question 7: Brief Definitions