TOROUTE

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Maps & Coordinates

Reading the world on a grid — latitude and longitude, map projections and topographic maps, contour lines and scale, and the great-circle geometry behind distance and bearing.

Geographic coordinate system

Geographic coordinate system

Latitude

Latitude

Longitude

Longitude

Map projection

Map projection

Mercator projection

Mercator projection

Topographic map

Topographic map

Contour line

Contour line

Nautical chart

Nautical chart

Great-circle distance

Great-circle distance

Haversine formula

Haversine formula

Cartography

Cartography

Scale (map)

Scale (map)

Compass rose

Compass rose