The Werner projection is a pseudoconic equal-area map projection

Map projection

A map projection is any method of representing the surface of a sphere or other three-dimensional body on a plane. Map projections are necessary for creating maps. All map projections distort the surface in some fashion...

 sometimes called the Stab-Werner or Stabius-Werner projection. Like other heart

Heart (symbol)

The heart has long been used as a symbol to refer to the spiritual, emotional, moral, and in the past, also intellectual core of a human being...

-shaped projections, it is also categorized as cordiform. Stab-Werner refers to two originators: Johannes Werner

Johannes Werner

Johann Werner was a German parish priest in Nuremberg and a mathematician...

 (1466–1528), a parish

Parish

A parish is a territorial unit historically under the pastoral care and clerical jurisdiction of one parish priest, who might be assisted in his pastoral duties by a curate or curates - also priests but not the parish priest - from a more or less central parish church with its associated organization...

 priest

Priest

A priest is a person authorized to perform the sacred rites of a religion, especially as a mediatory agent between humans and deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities...

 in Nuremberg

Nuremberg

Nuremberg[p] is a city in the German state of Bavaria, in the administrative region of Middle Franconia. Situated on the Pegnitz river and the Rhine–Main–Danube Canal, it is located about north of Munich and is Franconia's largest city. The population is 505,664...

, refined and promoted this projection that had been developed earlier by Johannes Stabius

Johannes Stabius

Johannes Stabius was an Austrian cartographer of Vienna who developed, around 1500, the heart-shape projection map later developed further by Johannes Werner. It is called the Werner map projection, but also the Stabius-Werner or the Stab-Werner projection...

 (Stab) of Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 around 1500.

The projection is a limiting form of the Bonne projection

Bonne projection

A Bonne projection is a pseudoconical equal-area map projection, sometimes called a dépôt de la guerre or a Sylvanus projection. Although named after Rigobert Bonne , the projection was in use prior to his birth, in 1511 by Sylvano, Honter in 1561, De l'Isle before 1700 and Coronelli in 1696.The...

, having its standard parallel at one of the poles (90°N/S). Distances along each parallel and along the central meridian are correct, as are all distances from the north pole.