IERS Reference Meridian
Videos
The IERS Reference Meridian, also called the International Reference Meridian, is the prime meridian maintained by the International Earth Rotation and Reference Systems Service. It passes about 5.3 a
Earthmap 720x 360 grid
Prime meridian
Videos
A prime meridian is a meridian in a geographic coordinate system at which longitude is defined to be 0°. On a spheroid, a prime meridian and its anti-meridian form a great ellipse. This divides the bo
IERS Reference Meridian
…The IERS Reference Meridian (IRM), also called the International Reference Meridian, is the prime meridian (0° longitude) maintained by the International Earth Rotation and Reference Systems Service (IERS). It passes about 5.3 arcseconds east of George Biddell…
The line of the Greenwich meridian at the Royal Observatory, Greenwich, England
The prime meridian sign in Parnay, Maine-et-Loire, France
Prime meridian sign near Somanya, Ghana
Marine sandglass MMM