Meridians

A voyage along two arbitrary lines

Meridians

Giclée on Heavy Cotton
850 x 140cm

“It is not down in any map; true places never are.”
– Herman Melville, Moby Dick

In 1884 Greenwich Mean Time (GMT) was established by international agreement as a world standard. It measures from the Greenwich Meridian that assigns zero degrees longitude, where east meets west.

It was arranged to the locally-orientated Principal Triangulation of Britain, undertaken from 1783 to 1853, a datum that used the Airy 1830 ellipsoid- a shape that approximates the form of the earth.

One hundred years later, the WGS84 (World Geodetic System 1984) was established for GPS positioning. Measured using atomic time, it was also adopted as an international convention. It is a three-dimensional coordinate system that uses the GRS80 (Geodetic Reference System 1980) ellipsoid, and is designed for positioning anywhere on the earth.

The GRS80 ellipsoid is somewhat bigger than the Airy ellipsoid and has a slightly different shape; both account for the equatorial bulge, and neither fits the Earth perfectly.

 
Alpha Beta Carta photo by Aurélien Mole

Alpha Beta Carta, Parc culturel de Rentilly, Paris 2014

Meridians at Mappamundi

Mappamundi, Berardo Museum-Foundation, Lisbon 2011

Meridians at Graphic Material

Graphic Material, UTS Gallery, Sydney 2010

Meridians at <TAG>

Geograms, <TAG>, The Hague 2006

Meridians at Always On, Sonar

Always On, Sonar / SonarMàtica, Barcelona 2006

Commissioned by the University of Minnesota Design Institute for “ELSE/WHERE MAPPING: New Cartographies of Networks and Territories” 2006, published by the Design Institute and distributed by University of Minnesota Press.

 

Placeholder image

Meridians, detail