Questions & Mysteries Why you need the 4th road poneglyph??

Discussion in 'One Piece Manga Discussion' started by iamzea, Apr 23, 2019.

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  1. iamzea

    iamzea

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    I saw someone saying that you only need 3 road poneglyphs despite the plot/Nami saying you need 4. It got me thinking if it can be done and did a little bit of an analysis. I'm not sure if anyone's done this before but here it goes.

    So the way we find the location of Raftel is by getting the locations indicated by the road poneglyphs and finding where the two connecting lines intersect. If we know where the four points are, we know where the intersect is - where Raftel is.
    [​IMG]

    If we assume that the four points will be in a somewhat square/rectangle shape, technically you can find where the intersection will be if you only have 3 points. The intersection will lie anywhere between the line you have/can draw (line B-C in this example).
    [​IMG]
    This way, having only 3 road poneglyphs would do the job of finding Raftel if you search along that known line.

    However, having four points can result to any quadrilateral shape. This means it can be a bit skewed. You won't necessarily know where the fourth point's orientation is. Take this image for example.
    [​IMG]
    The 3 dark blue dots represent the 3 known points while the light blue dots represent any possible location of the fourth point location that will result in two lines intersecting.

    If you draw the intersections for each possibility, you will get this:
    [​IMG]
    As you can see above, the location of Raftel will lie anywhere in the perimeter of the triangle formed by the 3 known points. As we don't know the scale of how far apart these points are, we don't know how long it'll take to search the whole perimeter if we don't have the last point's location. Although it's possible to do, it's not plausible in my opinion.

    Although Raftel is at the end of the Grandline, we don't know if the road poneglyph locations are close to the end of the Grandline, or if the coordinates span the whole world - while ultimately intersecting somewhere at the end of the Grandline. This means traversing that triangular perimeter wouldn't exactly work and hence, requires the last road poneglyph.


    Of course, we don't know if there's any more to the road poneglyphs and the location of Raftel that Oda hasn't revealed yet. What do you guys think?
     
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  2. iceteahottea

    iceteahottea

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    If you have 3 ponegylph coordinates, you best bet your first journey to find Raftel better happen immediately. Anyone can follow you and guess your path based on the direction you're traveling. While you're searching all the possible points on the line, they could be following you and doing the same except in the opposite direction based on intel.. intel that yonko could possibly possess with their vast communications network. If it's KNOWN you have these 3 coordinates, the entire world will follow your every move 24/7. So you don't have the time to travel to every point on the line if anyone else can pull the rug from right under you. 4 coordinates allows you to arrive at 1 location and 1 location only. It's the safest bet.
     
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  3. Friend A

    Friend A

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    Nicely done.
    There could be some sort of coded message (required for entry) that requires all 4 poneglyphss to decipher. For sure narrow it down a lot with 3 but like you said the scale of the search area may still be too vast.
     
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  4. lokilasher

    lokilasher

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    There’s definitely more to it imo. It’s not just go to the spot where they intersect, otherwise someone else would have accidentally stumbled upon it by now imo. I think the road poneglyphs have directions for what to do when you get to the X spot.
     
  5. Suuuuper

    Suuuuper

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    First even if we assume that they all are in the same plane (2D) then you still are guessing traveling a triangle. And we know that how the seas operate in OP is impossible to sail in straight lines.

    Then more important, if one of them is lets say at fishman island or in some sky island witch is very possible, you are in non eucliadian geometry and is basically impossible to do it with 3.
     
  6. Xatch

    Xatch

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  7. Shanks You

    Shanks You

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    Poneglyphs are stated to be difficult to read. Only a handful of people can decipher them at the moment.

    The underlying assumption being made here is that the 'coordinates' are actual places stated in plain text. Then you draw a line between the points.

    But that system overall is bad. With cryptography, there are loads of ways you can ensure that raftel can only be found after all 4 poneglyphs are found. For instance consider the following one time pad based system where the 4 poneglyphs coordinates are: 11001, 10100, 10010 and 00101. Raftel would be the modulo bit addition of all those points which is 11010. There are just 5 points in this example but you can extend this to a 1000 points or however points you want. To find the coordinate of Raftel in such a system requires all 4 poneglyphs. If you are missing just 1 poneglyphs, you might as well search the entire world from top to bottom to find Raftel coz 3 coordinates would tell you as much about where Raftel is as 0 coordinates.

    Only with 4 poneglyphs can you have the location of Raftel. I imagine whoever created the red poneglyphs was smart enough to employ some sort of system to ensure you need all 4 poneglyphs to find Raftel. I've shown one way that could be made possible.
     
    Last edited: Apr 23, 2019
  8. Mr. Tiddles

    Mr. Tiddles

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    This was pretty much discussed way back, when it was introduced.. but yeah, you really kinda need the 4th poneglyph to have some idea where raftel is... like in this example:

    [​IMG]

    Let's say you have three poneglyphs that identify the points A, B and C, but you don't have he 4th.. The location of the 4th could be anywhere, and it could still be vital to know where you're heading..
    • Let's say the location the 4th would show is somewhere in the area of point 1 which is above and between A and B; not knowing it means you're gonna have to sail somewhere in the orange line.
    • Let's say the location of the 4th is somewhere in the area of point 2 which is lateral to - and between A and C.. And not knowing it means you're gonna have to sail somewhere in the blue line as well.
    • Let's say the location of the 4th is in the area of point 3 which is below and between B and C.. And not knowing it means you're gonna have to sail somewhere in the green line as well.
    And so you're gonna have to sail through at least 3 possible lines (line between A and B, line between A and C, line between B and C), and seeing that raftel could either be a land island, a sky island, or an underwater island, it's gonna take you a shitload of time to find out..


    And what if there's a specific way to enter raftel? I mean, think about it.. if it's a random island, some people would probably discover it by accident; instead, this wasn't the case.. Roger was the only guy who found it, and didn't do it by accident.. so you're gonna have to be sure raftel's at that place to do anything, really. :hmmm:
     
    Last edited: Apr 23, 2019
  9. iamzea

    iamzea

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    Yeah this is just all in a 2D plane. I've seen people point out too that it could be all the way on the other side of the globe, mirroring the exact spot. And I agree, also taking account the possibilities of the type of island it could be (sky, underwater, land) the possibilities really are endless.

    Then I guess it's been done (with the similar concept as well).
    Nevermind
     
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  10. Buggy D ClowN

    Buggy D ClowN

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    Sailing in the GL is meant to be impossible without log poses so I think they will need to get eternal log posses for the four locations(If they are islands otherwise vivre cards) and get to the point where two sets of 2 point directly away from eachother. Also unless I am mistaken 4 locations will point to 2 places on the opposite sides of the planet. So while with 3 log poses(locations) it's double assuming you don't need further information that you have to get from all four of these places like how to actually enter this island(someone would come across it if it was just a normal island) you would be sailing around the whole world multiple times.
     
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  11. ImmaIvanoM

    ImmaIvanoM

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    If you're searching some unknown parameter then you better have a very good ship because the one piece world actively prevents people from just doing whatever they want on the ocean for however long they want... So sea king or freak weather phenomenon or something will eventually get you if you don't make land fall
     
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  12. Mr. Tiddles

    Mr. Tiddles

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    Yeah, and what if those islands were moving, just like Zou.. And so you have to like... trace their pattern of movement and see when do these points intersect perfectly... And so that means you could only find out where Raftel is at a certain amount of time, like maybe.. once every 20 years or something...

    Or maybe those four islands were actually fragments of raftel, but split into four - which makes Luffy's comment about "4 raftels" a foreshadowing... and the place where these moving islands converge is where One Piece is. :hmmm:

    Just some food for thought. xD
     
    Last edited: Apr 23, 2019
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