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Who invented it ? When was it first used? What advantages does it give over other projections?
Lumos3 09:24, 31 October 2006 (UTC)
The context of the subject – "map projection" – is that the left side are linear measures on the circle (aka "angles") and the right side are linear measures on the plane. Do we really need to spell this out explicitly? There are hundreds of published map projections, and if even 10% of them get documented here, things like this will get tedious real fast. mdf 21:42, 31 October 2006 (UTC)
The use of "180" and "360" is also questionable. The left hand arguments are radians, not degrees. mdf 21:53, 31 October 2006 (UTC)
I feel the new image size is too small. I carefully picked 512px, since it works about best without being obnoxiously large, and, frankly, there is going to be minimal text for an article on (most) map projections, but maximal image – the subject matter is intrinsically graphical. I "have" (such as it can be with a wiki) six other projections in, with more on the way, and a standard size is extremely important as it facilitates very easy comparison, particularly between projections of the same class. (Example: load up hammer projection and mollweide projection in separate tabs and you can "blink" them.) mdf 21:48, 31 October 2006 (UTC)
Isn't this just the Mercator projection? Steinbach (fka Caesarion) 22:31, 31 October 2006 (UTC)
Is this really true? This would mean that map fragments at high latitudes are relatively compressed in north-south direction, but this seems not to be the case. 88.211.131.57 17:40, 19 July 2007 (UTC)
what a hell is cosine doing in there? It is said, and can be seen, that the projection has "equally spaced meridians". This is simply impossible with cosine in it. If noone replies to this, I will remove it in a week. 82.207.15.147
I agree that the cosine term is confusing. I recommend changing the variable name. — Preceding unsigned comment added by 192.0.232.239 ( talk) 05:11, 16 October 2013 (UTC)
The Platte Carre projection is a cylindrical projection but should not be referred to as an equidistant cylindrical projection.
A cylindrical equidistant projection is equidistant along the equator AND along all meridians, making a map of the world slightly more than twice as wide as it is high due to the equatorial bulge.
The Platte Carre projection is only equidistant along the equator, and can never be equidistant along any meridians because distances between lines of latitude on earth are not constant. Refering to it as equidistant is like refering to the cylindrical equal-area projection(which is of course only equidistant along the equator) or pretty much any projection there is, as equidistant. Mr Picky ( talk) 20:56, 27 August 2008 (UTC)
Why is this article in panorama software category? While it is related, it's not a software. esby ( talk) 12:00, 8 January 2009 (UTC)
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) 22:38, 6 August 2011 (UTC)
The image map, as it appears in the main page, is incorrectly downsampled, missing parallels and meridians.
This is very confusing, considering that the scope of the image is to represent how the coordinates are projected.
— Preceding unsigned comment added by Gabriel Radic ( talk • contribs) 14:12, 13 September 2013 (UTC)
Hello! This is a note to let the editors of this article know that File:Equirectangular projection SW.jpg will be appearing as picture of the day on August 9, 2016. You can view and edit the POTD blurb at Template:POTD/2016-08-09. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. — Chris Woodrich ( talk) 09:39, 24 July 2016 (UTC)
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I can't help but notice that the Tissot's indicatrix image on this page lacks indicatrices on the International Dateline and poles - the poles being 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) 03:58, 16 February 2018 (UTC)
Source: https://frew.eri.ucsb.edu/private/ESM263/week/2/An_Album_of_Map_Projections.pdf (on-page number 219)
As seen in the linked source, both projections have the radius term R in front of both the x and y formulas. This is absent from the current formulas. It might also be good to explicitly state the Plato Carrée projection formulas, as it is different.
Aaronshenhao ( talk) 01:48, 23 August 2019 (UTC)
Hello! This is to let editors know that File:Blue Marble 2002.png, a featured picture used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for January 18, 2023. A preview of the POTD is displayed below and can be edited at Template:POTD/2023-01-18. For the greater benefit of readers, any potential improvements or maintenance that could benefit the quality of this article should be done before its scheduled appearance on the Main Page. If you have any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you! — Amakuru ( talk) 10:38, 31 December 2022 (UTC)
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The Eureka Inn is a hotel in Eureka, California, built in the Elizabethan Tudor Revival architectural style. Opened in 1922, it was purchased in 1960 by Helen Barnum, the matriarch of a successful timber family in the county, before being sold to John Biord after Barnum's death in 1993. In 2004, the inn was closed after tax defaults by its owner, reopening in 2010 after the businessman Libo Zhu purchased and refurbished it. In February 1982, the structure was listed on the National Register of Historic Places. This photograph shows the Eureka Inn's entrance hall as seen in 2020. Photograph credit: Frank Schulenburg
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Would the transformation for the plate carée version not be simply
(x,y) = (long, lat)
?
I don't see this mentioned. Butterfly or Chuang Tzu? ( talk) 02:12, 21 September 2023 (UTC)
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Who invented it ? When was it first used? What advantages does it give over other projections?
Lumos3 09:24, 31 October 2006 (UTC)
The context of the subject – "map projection" – is that the left side are linear measures on the circle (aka "angles") and the right side are linear measures on the plane. Do we really need to spell this out explicitly? There are hundreds of published map projections, and if even 10% of them get documented here, things like this will get tedious real fast. mdf 21:42, 31 October 2006 (UTC)
The use of "180" and "360" is also questionable. The left hand arguments are radians, not degrees. mdf 21:53, 31 October 2006 (UTC)
I feel the new image size is too small. I carefully picked 512px, since it works about best without being obnoxiously large, and, frankly, there is going to be minimal text for an article on (most) map projections, but maximal image – the subject matter is intrinsically graphical. I "have" (such as it can be with a wiki) six other projections in, with more on the way, and a standard size is extremely important as it facilitates very easy comparison, particularly between projections of the same class. (Example: load up hammer projection and mollweide projection in separate tabs and you can "blink" them.) mdf 21:48, 31 October 2006 (UTC)
Isn't this just the Mercator projection? Steinbach (fka Caesarion) 22:31, 31 October 2006 (UTC)
Is this really true? This would mean that map fragments at high latitudes are relatively compressed in north-south direction, but this seems not to be the case. 88.211.131.57 17:40, 19 July 2007 (UTC)
what a hell is cosine doing in there? It is said, and can be seen, that the projection has "equally spaced meridians". This is simply impossible with cosine in it. If noone replies to this, I will remove it in a week. 82.207.15.147
I agree that the cosine term is confusing. I recommend changing the variable name. — Preceding unsigned comment added by 192.0.232.239 ( talk) 05:11, 16 October 2013 (UTC)
The Platte Carre projection is a cylindrical projection but should not be referred to as an equidistant cylindrical projection.
A cylindrical equidistant projection is equidistant along the equator AND along all meridians, making a map of the world slightly more than twice as wide as it is high due to the equatorial bulge.
The Platte Carre projection is only equidistant along the equator, and can never be equidistant along any meridians because distances between lines of latitude on earth are not constant. Refering to it as equidistant is like refering to the cylindrical equal-area projection(which is of course only equidistant along the equator) or pretty much any projection there is, as equidistant. Mr Picky ( talk) 20:56, 27 August 2008 (UTC)
Why is this article in panorama software category? While it is related, it's not a software. esby ( talk) 12:00, 8 January 2009 (UTC)
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) 22:38, 6 August 2011 (UTC)
The image map, as it appears in the main page, is incorrectly downsampled, missing parallels and meridians.
This is very confusing, considering that the scope of the image is to represent how the coordinates are projected.
— Preceding unsigned comment added by Gabriel Radic ( talk • contribs) 14:12, 13 September 2013 (UTC)
Hello! This is a note to let the editors of this article know that File:Equirectangular projection SW.jpg will be appearing as picture of the day on August 9, 2016. You can view and edit the POTD blurb at Template:POTD/2016-08-09. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. — Chris Woodrich ( talk) 09:39, 24 July 2016 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Equirectangular projection. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
An editor has reviewed this edit and fixed any errors that were found.
Cheers.— InternetArchiveBot ( Report bug) 19:32, 24 January 2018 (UTC)
I can't help but notice that the Tissot's indicatrix image on this page lacks indicatrices on the International Dateline and poles - the poles being 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) 03:58, 16 February 2018 (UTC)
Source: https://frew.eri.ucsb.edu/private/ESM263/week/2/An_Album_of_Map_Projections.pdf (on-page number 219)
As seen in the linked source, both projections have the radius term R in front of both the x and y formulas. This is absent from the current formulas. It might also be good to explicitly state the Plato Carrée projection formulas, as it is different.
Aaronshenhao ( talk) 01:48, 23 August 2019 (UTC)
Hello! This is to let editors know that File:Blue Marble 2002.png, a featured picture used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for January 18, 2023. A preview of the POTD is displayed below and can be edited at Template:POTD/2023-01-18. For the greater benefit of readers, any potential improvements or maintenance that could benefit the quality of this article should be done before its scheduled appearance on the Main Page. If you have any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you! — Amakuru ( talk) 10:38, 31 December 2022 (UTC)
![]() |
The Eureka Inn is a hotel in Eureka, California, built in the Elizabethan Tudor Revival architectural style. Opened in 1922, it was purchased in 1960 by Helen Barnum, the matriarch of a successful timber family in the county, before being sold to John Biord after Barnum's death in 1993. In 2004, the inn was closed after tax defaults by its owner, reopening in 2010 after the businessman Libo Zhu purchased and refurbished it. In February 1982, the structure was listed on the National Register of Historic Places. This photograph shows the Eureka Inn's entrance hall as seen in 2020. Photograph credit: Frank Schulenburg
Recently featured:
|
Would the transformation for the plate carée version not be simply
(x,y) = (long, lat)
?
I don't see this mentioned. Butterfly or Chuang Tzu? ( talk) 02:12, 21 September 2023 (UTC)