Math 135: Functions of multiple variables
Contour plots in real life

There are many examples of contour plots on the web. Here are some.

• Thickness of Earth’s crust
• Sea surface temperature
• Body Mass Index from article
• Topographical map
• Housing prices in Houston from article
• pH of acid rain
• Sulfur dioxide on the island of Hawaii
• Strength of a radio signal
• Ozone depletion
• Mona Lisa
• Antarctic ice flow speed from article
• Earthquake risk map showing maximal horizontal ground acceleration from article
• Tornadoes in Texas from article
• Thunderstorm days per year from article
• Temperature at North Pole from article
• Noisy events near airport from article