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Webpage with program to calculate Distance & Bearing; Calculate distance and bearing between two Latitude/Longitude points and much more; See the end point on a map when you specify a start point, a bearing and a distance. More understandable definitions from an online classroom
The foundations for quantitative map scaling goes back to ancient China with textual evidence that the idea of map scaling was understood by the second century BC. Ancient Chinese surveyors and cartographers had ample technical resources used to produce maps such as counting rods, carpenter's square's, plumb lines, compasses for drawing circles, and sighting tubes for measuring inclination.
Start point Finish point Distance Ascent Descent 1 Overton Hill Ogbourne St George 9.0 miles (14.5 km) 627 feet (191 m) 866 feet (264 m) 2 Ogbourne St George Sparsholt Firs 16 miles (25 km) 1,381 feet (421 m) 1,155 feet (352 m) 3 Sparsholt Firs Streatley 17 miles (28 km) 794 feet (242 m) 1,362 feet (415 m) 4 Streatley Watlington
The minimum distance d is the distance along a great circle that runs through s and t. It is calculated in a plane that contains the sphere center and the great circle, , =, where θ is the angular distance of two points viewed from the center of the sphere, measured in radians.
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Formulas for the Web Mercator are fundamentally the same as for the standard spherical Mercator, but before applying zoom, the "world coordinates" are adjusted such that the upper left corner is (0, 0) and the lower right corner is ( , ): [7] = ⌊ (+) ⌋ = ⌊ ( [ (+)]) ⌋ where is the longitude in radians and is geodetic latitude in radians.
Magnetic declination varies both from place to place and with the passage of time. As a traveller cruises the east coast of the United States, for example, the declination varies from 16 degrees west in Maine, to 6 in Florida, to 0 degrees in Louisiana, to 4 degrees east in Texas.
Clay tablet with map of the Babylonian city of Nippur (c. 1400 BC)Maps in Ancient Babylonia were made by using accurate surveying techniques. [12] For example, a 7.6 × 6.8 cm clay tablet found in 1930 at Ga-Sur, near contemporary Kirkuk, shows a map of a river valley between two hills.
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