Where did you say you were calling from?

Where did you say you were calling from?

• If you wanted to tell somewhere where to find you right now using “coordinates,” what would you use?
• What does your phone use to note your location?
• Would those coordinates be good to use to measure distance? Here in Lexington, vs at the equator or near the poles?

Coordinates and Projections

• The round earth on a flat map = “a projection” 
  
  ^{source: illustrated human geography textbook}

   

• Imagine putting a strong light bulb in or near a transparent globe and then holding a piece of paper around the globe or in front of it.
  
  

  
  ^{cut from inspiredpencil.com}
  

• How many ways could you do that projection?

_{Edited by NDB Jan 22, 2025 & DJH Jan 10, 2026}