Isotachs are lines on a map that show areas of constant wind speed. Wind can also be used to track storm systems. Winds speeds at high spatial resolution through ground station is difficult and expensive, so wind speeds can now be detected through remote sensing satellites; these satellites give us a higher spatial resolution yet they do not always calculate accurate wind speeds. In this example, we can see how the winds from Hurricane Ike are depicted though using this remotely sensed data. Hurricanes create large pressure gradients in concentric circles from the eye; the isotachs are shown in the concentric circles and they show greater wind speed closer to the eye.
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