All calculations on 'Geography'

Angle and coordinate
Convert angles and coordinates from degrees, minutes and seconds to decimal degrees, radians and other units. Useful for Google Maps, positioning and other applications (Angles, Geography, Geometry, Positioning, Unit conversions)
Rotational velocity of a point on Earth surface
Allows to calculate and compare speed of an object or a person standing on the planet surface in various geographic places (Fun, Geography, Speed)