Nicolosi Globular Projection
May 28,2026

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Introduction

Nicolosi Globular Projection is a pseudocylindrical compromise world map projection introduced by the Italian cartographer Giambattista Nicolosi in 1660. It is one of the best-known early globular projections and was widely used before modern mathematical projections became standard. The projection represents the world in a rounded form and was valued for its visually balanced appearance. It is neither equal-area nor conformal, and today it is mainly of historical interest.

Projection Basic

The Nicolosi Globular Projection has the following main characteristics:

Classification: Pseudocylindrical compromise projection
Graticule: The equator and central meridian are straight lines; other meridians and parallels are curved
Outline: Circular or oval-like overall appearance
Symmetry: Symmetric about the equator and the central meridian
Mathematical Basis: Originally constructed geometrically, based on globular mapping principles rather than modern analytic formulas

Pros

Balanced appearance: The projection gives the world a rounded and visually pleasing form.
Uninterrupted world view: The entire globe is shown in one continuous map without interruptions.
Historical importance: It played a significant role in 17th-century and later cartography.
Decorative quality: Its graceful shape makes it suitable for historical reproductions and artistic map design.

Cons

Not equal-area or conformal: It does not preserve area, shape, distance, or direction accurately.
Increasing edge distortion: Distortion becomes more noticeable toward the outer parts of the map.
Limited analytical value: It is not appropriate for navigation, measurement, or GIS analysis.
Largely obsolete: Modern cartography generally prefers projections with clearer mathematical properties and better controlled distortion.

Application Scenario

The Nicolosi Globular Projection is mainly used in historical cartography, educational materials on map history, and decorative map design. It is useful when the goal is to present a traditional rounded world image or to illustrate pre-modern approaches to global mapping. However, for modern practical mapping, atlas production, or spatial analysis, it is rarely chosen because more accurate and functional projections are available.

Example

1. Hemispheres on the Nicolosi globular projection. 15° graticule, 115°W and 65°E central meridians. Imagery is a derivative of NASA's Blue Marble summer month composite with oceans lightened to enhance legibility and contrast. Image created with the Geocart map projection software.

2. Nicolosi globular projection distortion. Deeper tint means more distortion. Neutral color means distortion is balanced between angular deformation and areal inflation. Tissot indicatrix at 15° intervals.