Talk:Sinusoidal projection

Replace low-contrast images

I will be replacing images on the various map projection pages. Presently many are on a satellite composite image from NASA that, while realistic, poorly demonstrates the projections because of dark color and low contrast. I have created a stylization of the same data with much brighter water areas and a light graticule to contrast. See the thumbnail of the example from another article. Some images on some pages are acceptable but differ stylistically from most articles; I will replace these also.

The images will be high resolution and antialiased, with 15° graticules for world projections, red, translucent equator, red tropics, and blue polar circles.

Please discuss agreement or objections over here (not this page). I intend to start these replacements on 13 August. Thank you. Strebe (talk) 22:47, 6 August 2011 (UTC)

File:Sinusoidal projection SW.jpg to appear as POTD

Hello! This is a note to let the editors of this article know that File:Sinusoidal projection SW.jpg will be appearing as picture of the day on March 22, 2015. You can view and edit the POTD blurb at Template:POTD/2015-03-22. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. Thanks! — Crisco 1492 (talk) 01:05, 4 March 2015 (UTC)

Picture of the day

The sinusoidal projection is a pseudocylindrical equal-area map projection. Used as early as the 16th century, this projection shows distances accurately along the central meridian and the equator; areas furthest from these lines are the most distorted.Map: Strebe, using Geocart

What is the advantage?

I can get from the caption of a picture that sinusoidal projection represents area correctly, but it's not mentioned in the article at all, at least not that I could read. I'm not sure how to work it in (I'm not a cartographer), but it should be up front, preferably the first paragraph. Nerfer (talk) 14:23, 23 March 2015 (UTC)

External links modified (January 2018)

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Adding Indicatrices to poles and International Dateline

Sinusoidal with Tissot's Indicatrices of Distortion

I can't help but notice that the Tissot's indicatrix image on this page lacks indicatrices on the International Dateline and poles - where the majority of the distortion occurs for this projection. Would anyone be averse to me inserting my own image, which both spaces out the indicatrices at high latitudes and adds indicatrices in these regions? I know technically the ellipses are supposed to be calculated at infinitesimal scale and then sized up, so it doesn't technically make sense to put them on the poles, but I feel that it's important to illustrate just how distorted the poles are.

Justin Kunimune (talk) 03:59, 16 February 2018 (UTC)