Thursday, June 16, 2022


Desmos offers some tool math tools: Graphing Calculator, Geometry Tool, etc. All that is seemingly free to use and share/export (see example below). There is also Desmos Classroom which requires a login, but the Math Tools seem to be available to all.

Wednesday, June 8, 2022

Six Thousand Years of Forests

Six Thousand Years of Forests is a cool 'scrolly map' and starts with a series of world-wide maps of so-called Anthromes over time before detailing forest changes in Great Britain over time with beautiful art work.

Las Vegas & Lake Mead

There's more going-on here, but the side-by-side view of an expanding Las Vegas and a shrinking Lake Mead is striking. Now, please make this available as an animated GIF!

Friday, June 3, 2022

Wind Direction & Airports

This all makes sense: you want to align your airport runways with the prevailing wind directions. In-general, that would be (from a) westerly direction, but there are interesting local and regional wind direction patterns across the USA.

  • Wind History shows the classic wind roses for weather stations across the country - many of which are of course located at airports.
  • Trails of Wind shows the direction of airport runways.
Interesting to note that a) the wind direction in Texas and Kansas is often north/south and b) you can see the effect of valleys, for example wind direction in the Connecticut River Valley.