Re: Peirce Quincuncial Projection « Reply #51 on: June 08, 2018, 12:43:34 PM » Its the kind of map that isn't seen very often, and might therefore lend itself to T-shirts, mugs and other nice things if David wants some of his time back in the form of silver. If an alien species had mapped our world – the Peirce quincuncial projection [2048 x 2048] [OS]

world map using Peirce quincuncial projection Map, Earth

### The Peirce Quincuncial projection is "conformal", which means that angles are preserved (everywhere except the four points where the equator bends).

**Peirce quincuncial**. Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you take with a cameraphone. The Peirce quincuncial projection is a mapping of the surface of a sphere to the interior of a square. It is a conformal map except for four points on the equator. These points of non-conformality cause significant artifacts in photographic applications. In this paper, we propose an algorithm and user-interface to mitigate these artifacts. Moreover, in order to facilitate an interactive user. For example, here is a tutorial on creating Peirce quincuncial panoramas with Photoshop plugins, and here is a discussion (with scripts) for applying the projection to images with MathMap. The paper Warping Peirce Quincuncial Panoramas by Chamberlain Fong and Brian K. Vogel includes a MatLab implementation of their approach.

The Peirce quincuncial map projection shown in square (left) and diamond (right) orientations. Projection properties. The subsections below describe the Peirce quincuncial projection properties. Graticule. In a polar aspect, each half of the 90th meridians is a straight line. The other half comprises part of the outer edge of the projection. In my video, I mention that the Peirce Quincuncial Projection was developed by Charles Sanders Peirce in 1879 and Greenwich in London was selected as the Prime Meridian international standard in 1884. Just 5 year apart. Peirce Quincuncial Projection of the Sphere. The R-code provided can be used to project WGS84-coordinates into Peirce quincuncial projection. Until now there was no solution to do this in R. Jason Davies has produced a version of a quincuncial projected map that almost looks like the one in Peirce' original paper from 1879.

The Peirce quincuncial projection is implemented as d3.geoPeirceQuincuncial in d3-geo-projection. It is derived from the Guyou projection . See also its equatorial aspect . Peirce Quincuncial; Creator: Charles Sanders Peirce (1879) Group: Miscellaneous : Property: Conformal: Other Names — Remarks: The equator (red line in the image) is a square whose corners are the only four points on the map which fail to be conformal. Peirce Quincuncial; Creator: Irving I. Gringorten (1972) Charles Sanders Peirce (1879) Group: Miscellaneous: Miscellaneous: Property: Equal-area: Conformal: Other Names: Gringorten Quincuncial Equal-area — Remarks: Gringorten wanted to create a square map in order to efficiently use space (e.g. in printed articles).

The Peirce quincuncial map projection shown in square (left) and diamond (right) orientations. Projection properties. The subsections below describe the Peirce quincuncial projection properties. Graticule. In a polar aspect, each half of the 90th meridians is a straight line. The other half comprises part of the outer edge of the projection. i was able to make the peirce quincuncial projection work in windows by tweaking the code. the result is a projection consisting of 2 tiles, displaced from each other by 180 degrees. the two tiles are identical but each one represents a complete flattening of the source equirectangular panorama into a square. Define quincuncial. quincuncial synonyms, quincuncial pronunciation, quincuncial translation, English dictionary definition of quincuncial. also quin·cunx·ial adj. Of, relating to, or forming a quincunx. quin·cun′cial·ly adv. or adj 1. consisting of or having the appearance of a quincunx 2….

Reported by vesnikos on 4 Apr 2013 10:15 UTC This user at gis.stackexchange.com(1) noticed that proj4 doesn't support the Peirce quincuncial projection(2). I checked through the documentation a… The Peirce quincuncial projection is "formed by transforming the stereographic projection with a pole at infinity, by means of an elliptic function" (Peirce, 1879). The Peirce quincuncial is really a projection of the hemisphere, but its tessellation properties (see below) permit its use for the entire sphere. The Peirce quincuncial projection [1][2] is a mapping of the surface of a sphere to a square. It was originally proposed by Charles Sanders Peirce in 1879 for geographic applications. Indeed, Peirce was working for U.S. Coast and Geodetic Survey when he came up with this projection.

Peirce's quincuncial projection. Ask Question Asked 7 years, 3 months ago. Active 2 years, 10 months ago. Viewed 2k times 34. 17 $\begingroup$ The Peirce quincuncial projection is the cartographic projection of a sphere onto a square. In short, I would like to see it implemented in Mathematica. Here is my code:. The Peirce quincuncial projection is a conformal map projection developed by Charles Sanders Peirce in 1879. The projection has the distinctive property that it can be tiled ad infinitum on the plane, with edge-crossings being completely smooth except for four singular points per tile. The projection has seen use in digital photography for portraying 360° views.

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