Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

- Triangulation by Sheila Shamuganathan 30776 views
- Triangulation and trilateration pdf... by Gokul Saud 4958 views
- Triangulation by Institute of Surv... 1620 views
- Triangulación by nAyblancO 24036 views
- EXT 501 - Triangulation Presentation by Joanna Wiebe 5872 views
- Triangulación doc by nAyblancO 34848 views

No Downloads

Total views

1,909

On SlideShare

0

From Embeds

0

Number of Embeds

18

Shares

0

Downloads

82

Comments

0

Likes

2

No embeds

No notes for slide

- 1. Some ideas about triangulation David Coulson, 2014
- 2. Triangulation is about finding distances when you can’t simply go and measure them.
- 3. How far is it across the river to the door of the castle?
- 4. If you walk left or right along the ‘baseline’ until the viewing angle is 45 degrees, then the distance across the river is the same as the distance you walked.
- 5. Alternatively you could walk until the viewing angle is 60 degrees, and use a bit of maths to work out the distance.
- 6. Pythagoras can tell you the shortest distance.
- 7. The side lengths are the same, therefore the half triangle has a length half of the slanting side.
- 8. L That gives us the direct distance to the target.
- 9. This numbers turns out to be about 1.75 times the distance you walked
- 10. If you know some trig, you can walk any distance you like. ....
- 11. The further you go, the more accuracy you’ll get. ..........
- 12. But this might not be practical.
- 13. Maybe you can only sight the target from two locations.
- 14. 1 2
- 15. 1 2 Maybe you can’t even establish a perpendicular baseline.
- 16. 1 2
- 17. If you sight the Moon at sunrise and sunset, very precisely... ...You can estimate the distance from the Earth to the Moon.
- 18. And if you sight a star from opposite sides of the solar system, very precisely... ... You can estimate the distance to the star.
- 19. [END] dtcoulson@gmail.com

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment