explain xkcd - User contributions [en]

Talk:2495: Universal Seat Belt

2021-07-29T03:27:13Z

141.101.99.183:

Looks like Randall has started a new series: Cursed Connectors. [[Special:Contributions/172.69.34.171|172.69.34.171]] 01:51, 29 July 2021 (UTC)
:I now await the 10Base2 connector with ''actual'' bayonet blade attached... [[Special:Contributions/141.101.99.183|141.101.99.183]] 03:27, 29 July 2021 (UTC)

Dangit! Its the wrong way around... Wait, it doesn't fit this way either... [[Special:Contributions/172.70.51.134|172.70.51.134]] 01:56, 29 July 2021 (UTC)

Talk:2493: Dual USB-C

2021-07-25T16:43:52Z

141.101.99.183:

I guess this is how connector vendors maintain backwards compatibility for USB-C. ----DaveK

I would have thought it was cursed more from what would happen if you plugged it into a standard ac outlet. [[Special:Contributions/162.158.74.107|162.158.74.107]] 04:49, 24 July 2021 (UTC)

Looks good. But I'll obviously need a BS 1363/Type-G converter! [[Special:Contributions/141.101.99.211|141.101.99.211]] 09:14, 24 July 2021 (UTC)

It's worth noting, Dell already does this with the WD19DCS... [[Special:Contributions/141.101.99.211|141.101.99.211]] 09:23, 24 July 2021 (UTC) Gargravarr

Is it worth pointing out that "cursed X" is a meme, c.f. /r/cursedimages? I think this is the first time xkcd has referenced it. --[[User:Esogalt|Esogalt]] ([[User talk:Esogalt|talk]]) 14:59, 24 July 2021 (UTC)
:No I do not think so. That something is cursed is not special to a meme. This reminds more of the bad map projections series. Wonder if more will follow. Have added this similarity in title to the explanation. Starting with a very high number just like that series. In that series number 4 comic just came out, so interesting to see if he has planned more of these. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 14:32, 25 July 2021 (UTC)

This comic yet has no categories. And I cannot think of any suitable? Something with electronics that is not a category yet? I mean it can be used with smart phones and computers, but is not only used for one of these? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 14:32, 25 July 2021 (UTC)
:I was thinking something like 'Spurious Series(es?)'. It could encompass My Hobby and Map Projections as child-categories (they're self-categorised, I'm fairly sure without checking) but any lone "Something-Or-Other #xyz" like this is added as a direct example. And then if "Something-Or-Other #pqr" ever happens and is so categorised it ''highlights'' the need to create a Something-Or-Other category and reassign membership to this instead. If it never gets any direct companions, it can stand out as a spurious to the extent of never being partnered by up to ''xyz-1'' other later examples.
:Non-spurious serieses (xkcdphone, e.g.) that start with example #1 (or even un-numbered, but clearly item 1 in hindsight) might be better to be dealt with as is. But anything pretending to be just one of dozens/hundreds of as-yet-untold examples, especially out of index order (#1 is unlikely to be referenced, for reasons of refusing to establish a truly comprehensive catalogue that doesn't even exist, but would not necessarily disqualify such a leap-frogging/randomly-sampled series if it appeared anyway, after the original asynchro ous+gappy impressions) is probably an intentional Spurious Series.
:Or find an even better term. Or supercategorise Series with subcats of Storytelling/Chronicalling/Chronological (Journal), Upgrades/Revisiting (xkcdphone, also Internet Map?) and Spurious/Ad Hoc (as above), allowing room for future additions to revisit the true nature of the series concerned.
:Would need a proper editorial policy discussion, of course, especially to find better terminology (of whatever form of grouping(s) the final conclusion recommended). But perhaps you can see some glimmer of (a different?) solution in what I have just suggested. Putting it out there so at least it's there to be ignored or dismissed as overthinking the matter. [[Special:Contributions/141.101.99.183|141.101.99.183]] 16:43, 25 July 2021 (UTC)

977: Map Projections

2014-07-03T08:54:35Z

141.101.99.183: /* Explanation */ section 'Goode Homolosine', substitute "from" in place of "off of"

{{comic
| number = 977
| date = November 14, 2011
| title = Map Projections
| image = map_projections.png
| titletext = What's that? You think I don't like the Peters map because I'm uncomfortable with having my cultural assumptions challenged? Are you sure you're not... ::puts on sunglasses:: ...projecting?
}}

==Explanation==
{{w|Map projection}}, or how to represent the spherical Earth surface onto a flat support (paper, screen...) to have a usable map, is a long-time issue with very practical aspects (navigation, geographical shapes and masses visualization, etc.) as well as very scientific/mathematical ones, involving geometry or even abstract algebra among other things. There is no universal solution to this problem, any 2D map projection will always distort in a way the spherical reality; many projections have been proposed in various contexts, each intending to minimize distortions for specific uses (for nautical navigation, for aerial navigation, for landmass size comparisons, etc.) but having drawbacks from other points of view. Some of them are more frequently used than others in mass media and therefore more well-known than others, some are purely historical and now deprecated, some are very obscure, etc.

[[Randall]] suggests here the idea that someone's "favorite" map projection can reveal aspects of their personality, then goes through a series of them to show what they can mean:

;Mercator
:The {{w|Mercator projection}} was introduced by Flemish cartographer Gerardus Mercator in 1569. The main purpose of this map is that at any point the vertical and horizontal scales are the same, so locally i.e. considering only a small part of the map, geographical features (shapes, angles) are well represented, which helps a lot in recognizing them on-the-field, or for local navigation in that small part only. For this reason, that projection (or a close variant) is used in several online mapping services, such as Google Maps, which means that it is frequently encountered by the general public. No angle distortion also means that a straight line on the map corresponds to a course of constant bearing (direction), which was very useful for nautical navigation in the past (and thus made that projection very well-known).

:However, from a global point of view, this projection is radically incorrect in how it shows the size of landmasses (for instance Antarctica or Greenland seem gigantic), and furthermore, it always excludes a small region around each pole (otherwise the map would be of infinite height), so it doesn't provide a complete solution for the problem of map projection. The comic implies that people who like that projection aren't very interested with map issues, and typically use what they are offered without thinking much about it.

;Van der Grinten
:The {{w|Van der Grinten projection}} is not much better than the Mercator. It was adopted by {{w|National Geographic}} in 1922 and was used until they updated to the Robinson projection in 1988.

:The Van der Grinten projection is circular as opposed to the Mercator projection. Circles look happier than squares, leading to the conclusion that people who like the projection are optimistic.

;Robinson
:The {{w|Robinson projection}} was developed by {{w|Arthur H. Robinson}} as a map that was supposed to look nice and is often used for classroom maps. National Geographic switched to this projection in 1988, and used it for ten years, switching to the Winkel-Tripel in 1998.

:{{w|The Beatles}} was a rock band that enjoyed great commercial success in the 1960s. The Beatles, coffee, and running shoes suggest an ordinary, easygoing lifestyle paralleled by the projection.

;Dymaxion
:Also called the Fuller Map, the {{w|Dymaxion Map}} takes a sphere and projects it onto an icosahedron, that is a polyhedron with 20 triangular faces. It is far easier to unwrap an icosahedron than it is to unwrap a sphere into a 2D object and has very little skewing of the poles.

:Randall associates the projection to geek subculture and niche markets:
:*{{w|Isaac Asimov}} was an American science-fiction writer, that (as well as publishing many textbooks) is considered the father of the modern concept of robots. He invented the {{w|Three Laws of Robotics}}. He also worked on more than 500 books throughout his career.
:*{{w|XML}} is the eXtensible Markup Language. It is used to represent data in a format that machines can read and understand, as well as being human-readable. In practice, XML is cumbersome to read.
:*{{w|Vibram FiveFingers|Toed-Shoes}} are a [[1065: Shoes|favorite]] of Randall's to pick on. In society they are seen as a {{w|geek}} clothing item.
:*Brought to the world by {{w|Dean Kamen}}, the {{w|Segway PT}} was supposed to be a device that changed the way cities were built. In reality, most principalities have put in place rules specifically against Segways, making them a frustration to own and use within the law (in some states in Australia, it is illegal to use them on public footpaths or roads). Also, the former owner of {{w|Segway Inc.}}, the late {{w|Jimi Heselden}}, accidentally rode his Segway off a cliff in 2010.
:*{{w|Virtual reality|3D goggles}} are a very niche market only pursued by enthusiasts. In the 1990s the promise of virtual realities was very tantalizing; many companies attempted to perfect it, but fell short of the mark. Also, the phrase "The grass is always greener on the other side of the fence" is relevant.
:*{{w|Dvorak Simplified Keyboard|Dvorak}} is an alternate keyboard layout to QWERTY. Where QWERTY was invented to help keep manual typewriters from jamming (by placing the most used keys further away from each other), Dr. {{w|August Dvorak}} performed many studies and found the mathematically optimal keyboard layout to reduce finger travel for right handed typists. While technically better than QWERTY, QWERTY had become the standard. All the keyboards were laid out in QWERTY format, and retraining the brain after becoming a touch typist is extremely difficult.

;Winkel Tripel
:Proposed by {{w|Oswald Winkel}} in 1921, this map tried to reduce a set of three (German: Tripel) main problems with map projections: area, direction, and distance. The {{w|Kavrayskiy VII projection|Kavrayskiy projection}} is very similar to the Winkel Tripel and was used by the USSR, but very few in the Western world know of it.

:The comic links this projection to {{w|hipster}} subculture. The hipster stereotype is to avoid conforming to mainstream fashions. "Post-" refers to a variety of musical genres such as {{w|post-punk}}, {{w|post-grunge}}, {{w|post-minimalism}}, etc. that branch off of other genres.

;Goode Homolosine
:The {{w|Goode homolosine projection}} takes a different approach to skewing a sphere into a roughly circular surface. An orange peel can be taken from an orange and flattened with fair success; this is roughly the procedure that {{w|John Paule Goode}} followed in creating this projection. Randall is suggesting that people who like this map also prefer relatively easy solutions to other things in life, despite those solutions having nuanced problems that are more difficult to address.

:Common people make arguments that if normal people would run the United States, then the US wouldn't be in the trouble it is. This is from the belief that career politicians are simply out to make money and will only act in the interest of their constituency when their continued easy life is threatened (usually around election time).

:Airline food is another, much maligned, problem. How do you store enough food to feed people on long airplane trips? The common solution is to use some kind of sub-standard microwaveable dinner. Randall is saying that the people in favor of the Goode Homolosine wonder why the airlines don't simply order meals from the restaurants in the airport, store that food, and serve it, rather than using frozen and microwaved food.

:Older cars burned oil like mad fiends, and oil back then would become corrosive to the innards of an engine, so oil had to be changed often. But, with the introduction of synthetic motor oil and better designed engines, new cars only need their oil changed about every 10,000 to 15,000 miles. A common conspiracy theory is that modern automobile oil manufacturers still recommend that car owners change their oil every 3,000-5,000 miles to "drum" up more business, even though that frequency is unnecessary.

:All of these references suggest that people who like the Goode Homolosine projection are fans of easy solutions to problems. However, the solutions would not necessarily work in practice. For instance, the restaurants might have trouble making enough food for the whole plane, and it could get cold before being served. Also, the air conditions [http://www.nbcnews.com/health/one-reason-airline-food-so-bad-your-own-tastebuds-6C10823522 aboard planes] can affect taste, so airlines say they optimize for this. And there is no such thing as a "normal" person, and if there was he/she would have virtually no chance at actually getting into government office.

;Hobo-Dyer
:The {{w|Hobo–Dyer projection}} was commissioned by Bob Abramms and Howard Bronstein and was drafted by Mick Dyer in 2002. It is a modified {{w|Behrmann projection}}. The goal was to be a more visually pleasing version of the Gall-Peters.

:As is discussed in the Gall-Peters explanation, the Gall-Peters was developed to be equal area, so that economically disadvantaged areas can at least take comfort in the fact that their country is represented correctly by area on maps.

:Randall associates the Hobo-Dyer projection to "crunchy granola" — a stereotype associated with vegetarianism, environmental activism, anti-war activism, liberal political leanings, and some traces of {{w|hippie}} culture.

:With the new general acceptance of homosexual, bisexual, and transgender persons, some have begun to invent gender-neutral pronouns so that when referring to a person whose gender is not known they cannot be offended by being referred to by the wrong pronouns. In {{w|Middle English}} 'they' and 'their' were accepted gender-less pronouns that could replace 'he', 'she' as well as be used to represent a crowd, but this usage is considered by some to be grammatically incorrect because of the plural/singular debate ([http://www.merriam-webster.com/video/0033-hisher.htm stupid Victorian Grammarians!]). None of the {{w|gender-neutral pronoun#Invented_pronouns|many attempts at popularizing gender-neutral pronouns}} have achieved any degree of success in the mainstream.

;Plate Carrée
:Also known as the {{w|Equirectangular projection}} has been in use since, apparently, 100 AD. The benefit of this projection is that latitude and longitude can be used as x,y coordinates. This makes it especially easy for computers to graph data on top of it.

:According to the comic, the projection appeals to people who find much beauty in simplicity.

;A Globe!
:In any good discussion there has to be at least one smart-ass. This is a comic about map projections, that is, the science of taking a sphere and flattening it into 2 dimensions. The smart-ass believes that we shouldn't even try: a sphere is, tautologically, the perfect representation of a sphere.

:To quote ''{{w|The Princess Bride}}'': "Yes, you're very smart. Shut up."

;Waterman Butterfly
:Similar to the Dymaxion, the {{w|Waterman butterfly projection}} turns a sphere into an octahedron, and then unfolds the net of the octahedron, which was devised by mathematician {{w|Waterman polyhedron|Steve Waterman}} based upon the work of {{w|Bernard J.S. Cahill}}

:Bernard Cahill published a [http://www.genekeyes.com/B.J.S._CAHILL_RESOURCE.html butterfly map] in 1909. Steve Waterman probably has the only extant "ready to go" map following the same general principles, though Gene Keys may not be far behind. Waterman has a poem with graphics in a similar vein to this xkcd comic that is worth reading.[http://watermanpolyhedron.com/worldmap.html]

:[http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/projPoly2.html Polyhedral projections] like Cahill, Dymaxion or Waterman typically offer better accuracy of size, shape and area than flat projections, at the expense of compass directionality, connectedness, and other complications.

:The joke is that the person responding deeply understands map projections; anyone who knows of this projection is a person that Randall would like to get to know.

;Peirce Quincuncial
:The {{w|Pierce quincuncial projection}} was devised by {{w|Charles Sanders Peirce}} in 1879 and uses {{w|complex analysis}} to make a {{w|conformal mapping}} of the Earth, that conforms except for four points which would make up the south pole.

:{{w|Inception}} was a 2010 movie about {{w|meta}} {{w|lucid dream}}ing. It has a complex story that is difficult to follow and leaves the viewer with many questions at the end, and almost needs to be watched multiple times to be understood.

:The human brain is not well developed to deal with oddly obvious things. One example is that everyone has a skeleton, but everyone is surprised to see a part of their body represented by an X-Ray. Another is the fascinating complexity of the human hand, a machine which is amazingly complex, driven by a complex interplay of electrical and chemical signals; yet is the size of the hand and so useful.

;Gall-Peters
:The {{w|Gall-Peters projection}} is mired in controversy, surprising for a map. {{w|James Gall}} a 19th century clergyman presented this projection in 1855 before the {{w|British Association for the Advancement of Science}}. In 1967, the filmmaker {{w|Arno Peters}} created the same projection and presented it to the world as a "new invention" that put poorer, less powerful countries into their rightful proportions (as opposed to the Mercator). Peters played the marketing game and got quite a few followers of his map by saying it had "absolute angle conformality," "no extreme distortions of form," and was "totally distance-factual" in an age when society was very concerned about social justice. All of these claims were in fact false. The polar regions are horribly distorted, and south of the Mediterranean Sea is "taller" than it should be.

:Anyone who loves such a politically charged map that has become popular by way of marketing stunts, Randall would rather not have anything to do with.

The title text makes a joke that goes to the familiar meme from ''{{w|CSI: Miami}}'', in which the star, David Caruso starts a sentence, then [[:Category:Puts on sunglasses|puts on his sunglasses]] and ends the sentence with a corny pun. In this case, the pun is on {{w|map projection}} and {{w|projection (psychology)|projection}} in Psychology. Psychologic projection is an immature defense mechanism wherein a person who is uncomfortable with their own thoughts and/or actions assumes that another also shares this thought or action and blames that person for thinking/behaving that way, removing some of the negative feelings they have towards themselves. The Sunglasses internet meme has been mentioned previously by xkcd in comics [[626]], [[524]] and possibly others.

==Transcript==
:What your favorite
:'''Map Projection'''
:says about you
:[All of these are organized as Title, a copy of the particular projection underneath, and what it says about you under that.]

:*Mercator
:**You're not really into maps.
:*Van der Grinten
:**You're not a complicated person. You love the Mercator projection; you just wish it weren't square. The Earth's not a square, it's a circle. You like circles. Today is gonna be a good day!
:*Robinson
:**You have a comfortable pair of running shoes that you wear everywhere. You like coffee and enjoy The Beatles. You think the Robinson is the best-looking projection, hands down.
:*Dymaxion
:**You like Isaac Asimov, XML, and shoes with toes. You think the Segway got a bad rap. You own 3D goggles, which you use to view rotating models of better 3D goggles. You type in Dvorak.
:*Winkel-Tripel
:**National Geographic adopted the Winkel-Tripel in 1998, but you've been a W-T fan since ''long'' before "Nat Geo" showed up. You're worried it's getting played out, and are thinking of switching to the Kavrayskiy. You once left a party in disgust when a guest showed up wearing shoes with toes. Your favorite musical genre is "Post–".
:*Goode Homolosine
:**They say mapping the Earth on a 2D surface is like flattening an orange peel, which seems enough to you. You like easy solutions.You think we wouldn't have so many problems if we'd just elect ''normal'' people to Congress instead of Politicians. You think airlines should just buy food from the restaurants near the gates and serve ''that'' on board. You change your car's oil, but secretly wonder if you really ''need'' to.
:*Hobo-Dyer
:**You want to avoid cultural imperialism, but you've heard bad things about Gall-Peters. You're conflict-averse and buy organic. You use a recently-invented set of gender-neutral pronouns and think that what the world needs is a revolution in consciousness.
:*Plate Carrée <small>(Equirectangular)</small>
:**You think this one is fine. You like how X and Y map to latitude and longitude. The other projections overcomplicate things. You want me to stop asking about maps so you can enjoy dinner.
:*A Globe!
:**Yes, you're very clever.
:*Waterman Butterfly
:**Really? You know the Waterman? Have you seen the 1909 Cahill Map it's based— ...You have a framed reproduction at home?! Whoa. ...Listen, forget these questions. Are you doing anything tonight?
:*Peirce Quincuncial
:**You think that when we look at a map, what we really see is ourselves. After you first saw ''Inception'', you sat silent in the theater for six hours. It freaks you out to realize that everyone around you has a skeleton inside them. You ''have'' really looked at your hands.
:*Gall-Peters
:**I ''hate'' you.

{{comic discussion}}
[[Category:Charts]]
[[Category:Puts on sunglasses]]

511: Sleet

2014-01-21T13:16:02Z

141.101.99.183: added link between date of comic and noted Christmas carol

{{comic
| number = 511
| date = December 1, 2008
| title = Sleet
| image = sleet.png
| titletext = I mean, I can barely hear myself complaining about Battlestar Galactica.
}}

==Explanation==
[[Megan]] is seen leaving an apartment, trudging through {{w|Sleet|foul weather}}. The dialog is likely her thoughts, rather than speech. She is fed up with the second person's (hereafter [[Cueball]]) endless discussion of {{w|Digital rights management}} (DRM). She probably agrees with Cueball's position, but would rather face the weather than his endless rehashing of the issue. In the last panel, {{w|Free Culture (book)|Free Culture}} is a book by {{w|Lawrence Lessig}}, who advocates for fewer restrictions in many areas. In the title text, {{w|Battlestar Galactica}} is a science-fiction TV series that produces strong reactions among geeks. The first line is possibly a reference to the song {{w|Let It Snow! Let It Snow! Let It Snow! |Let It Snow}}, a holiday tune, this is consistent with the date of the release of the comic on the first day of December (first day of Advent) when Christmas Carols start to become more prevalent.

==Transcript==
:[Rainy, cold, windy street; Megan is walking along street; narration is from Megan's point-of-view.]
:The weather outside is frightful.
:I hate trudging through the icy slush and biting sleet.
:But it beats lying in our warm, cozy bed
:Listening to you talk about DRM for hours on end.
:Offscreen: Come back! Just listen to this one quote from ''Free Culture''!

{{comic discussion}}
[[Category:Comics featuring Megan]]