Projection Gallery

Share your new projection with other Flex Projector users by sending us the projection text file with the name you want to give it. For example: My great projection.txt. Also provide your name, organization (if any), and email address. We will do the rest. All projections on this page are in the public domain and free for anyone to use.

NEW PROJECTIONS CREATED WITH FLEX PROJECTOR

A4
Author: Bernhard Jenny, Oregon State University Email
Read the article Flex Projector—Interactive Software for Designing World Map Projections for more information about the A4 projection.

Note: The article above mentions that the directions of meridians at poles is 62 degrees. This value has been corrected. The new value is 63.883 degrees. This change was necessary due to a bug in early versions of Flex Projector, which has been fixed in a more recent version. The correction to the angle value was required to avoid any change to the graticule of the A4 projection when loading the parameters with newer versions of Flex Projector.

Distortion (lower is better): Angular 26.40, Areal 0.17, Scale 0.28




Ciric I
Author: Strahinja Ciric (Страхиња Ћирић) Email
The Ciric I projection is based on the Winkel-Tripel and optimized for 54 degrees of acceptable angular distortion and 150% acceptable areal distortion, with parallel bending increasing linearly with latitude, and with equally-distributed meridians.
Distortion (lower is better): Angular 25.84, Areal 0.16, Scale 0.29
Released 12 Nov. 2010

Copyright Note: I, Strahinja Ciric, the copyright holder of this work, hereby release it into the public domain. This applies worldwide. In case this is not legally possible, I grant any entity the right to use this work for any purpose, without any conditions, unless such conditions are required by law.




Cropped Ginzburg VIII
Author: Bernhard Jenny, Oregon State University Email
Read the article Graphical design of world map projections for more information about the Cropped Ginzburg VIII projection.
Distortion (lower is better): Angular 23.33, Areal 0.29, Scale 0.30
Released 12 Nov. 2010




Dedistort
Author: Kalinni Gorzkis Email

Dedistort is the A4 projection mixed with the Ciric I projection. It has a large acceptable distortion range.

Note: Due to a bug in Flex Projector, it is not currently possible to store projection files using external flex projections as source projections. To construct this projection, first download the A4 and the Ciric I projections from this page, then select Simple Mixer in Flex Projector and choose "Flex Projection (from external file)" for the two source projections and select the downloaded A4 and Ciric I files.

Dedistort Map Projection


Hammer-Cylindrical
Author: Kalinni Gorzkis Email

Screen Shot 2013-08-08 at 4.57.27 PM


Natural Earth
Author: Tom Patterson, US National Park Service, Email
Read the article Flex Projector—Interactive Software for Designing World Map Projections for more information about the Natural Earth projection.

Note: An analytical expression for the Natural Earth projection has been developed, which adds additional curvature to the meridians. This new version cannot be altered with Flex Projector, but it is included in Flex Projector as a background projection (use Show Second Projection), and should be used instead of this older version. See http://www.shadedrelief.com/NE_proj/ for more information and code for the new Natural Earth projection.

The article above mentions that the directions of meridians at poles is 62 degrees. This value has been corrected. The new value is 63.883 degrees. This change was necessary due to a bug in early versions of Flex Projector, which has been fixed in a more recent version. The correction to the angle value was required to avoid any change to the graticule of the Natural Earth projection when loading the parameters with newer versions of Flex Projector.

Distortion (lower is better): Angular 20.56, Areal 0.19, Scale 0.25