1. Projections and distances
LAMAD
Projections and distances
Radu Mariescu-Istodor

2. Projections Azimuthal Sources: Wikipedia
Tissot’s indicatrix of deformation
Sources: Wikipedia

3. Projections
Tissot’s indicatrix of deformation
Conical

4. Projections Cillindrical Equirectangular
Tissot’s indicatrix of deformation
Cillindrical

5. Projections Cillindrical Mercator Preserves directions
Tissot’s indicatrix of deformation
Preserves directions
Compromises scale
Cillindrical

6. Demo 1

7. Earth
R = 6371 km
PRIME
MERIDIAN
62oE
23oN
EQUATOR
23oS

8. Coordinates R = 6371 km Tuusniemi WGS 62.81N 28.49E yx y z
Tuusniemi
62.81N 28.49E
WGS
World Geodetic System

9. Coordinates R = 6371 km Tuusniemi y r z r x 62.81N 28.49E x = 1389 km
y = 5667 km r x
z = 2558 km
r = 2911 km

10. Distances Tuusniemi Dubai Euclidean Haversine 62.81N 28.49E
p1 = (x1, y1, z1)
p2 = (x2, y2, z2)
Tuusniemi
62.81N 28.49E
Euclidean
Haversine
Dubai
25.20N 55.43E

11. Demos 2 & 3