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Geographic network | Longitude
 

1º de ESO Geography and History


Geography Unit THE EARTH PLANET- Index

THE EARTH

MOVEMENTS OF THE EARTH

GEOGRAPHIC NETWORK

REPRESENTATION OF THE EARTH

Mind maps MIND MAPS

Mind map Earth planet mind map

Glossary GLOSSARY

Equator
Tropic of Cancer
Tropic of Capricorn

Hemisphere
Equinox
Solstice

Interactive exercises EXERCISES

Links LINKS

Keywords KEYWORDS

Usual English phrases USUAL PHRASES


Relief Unit RELIEF

Climate Unit THE CLIMATE

Prehistory Unit PREHISTORIC LIFE

Egypt Unit EGYPT


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Longitude
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Longitude is the distance measured in degrees, minutes and seconds, from any point on Earth's surface and the meridian 0 (Greenwich).

It is measured east or west. Its value is between 0 and 180 degrees.

Longitude. Enlarge image
Longitude Enlarge image

Longitude and latitude. Press the buttons Enlarge animation
Lenni Armstrong, Informmotion/NOAA http://serc.carleton.edu

Global Positioning Systems

"Determination of location in field conditions was once a difficult task. In most cases, it required the use of a topographic map and landscape features to estimate location. However, technology has now made this task very simple. Global Positioning Systems (GPS) can calculate one's location to an accuracy of about 30-meters. These systems consist of two parts: a GPS receiver and a network of many satellites. Radio transmissions from the satellites are broadcasted continually. The GPS receiver picks up these broadcasts and through triangulation calculates the altitude and spatial position of the receiving unit. A minimum of three satellite is required for triangulation." www.physicalgeography.net

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© Jorge Juan Lozano Cámara, profesor del IES Juan de la Cierva de Vélez-Málaga
Licenciado por la Universidad de Granada (España)
   claseshistoria@hotmail.com

Ana María Marcos Sánchez, profesora del IES Juan de la Cierva de Vélez-Málaga
Licenciada por la Universidad de Málaga (España)

Kerry Elyse Hart, Licenciada por la Universidad de Richmond (Virginia, USA)

 

 
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