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Messages - iamcpc

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61
Flat Earth Theory / Re: Are plane tickets real?
« on: April 30, 2020, 12:45:47 AM »
In the realm of mathematics, these are not a problem. You can write them down if you invent a special notation such as 0.3 with a bar or dot above the 3 to indicate infinite repetition. Computers don't have this concept so the best you can do on a computer is fill as many available bits as you can (53) to get get as close to 1/3 as you can. Let's say that 53 bits is approximately equivalent to 16 decimal digits, so the best you can do is say that 1/3 is 0.3333333333333333, but the problem here is you can't tell the difference between a genuine 1/3 and 0.3333333333333333 (16 digits) or 0.33333333333333333333 (20 digits), because you can only store 16 digits in total. You end up with (in this case) 3 different numbers, which are all indistinguishable because all you can ever see is the first 16 digits. It's ambiguous.

This does not change the fact that, on a computer, x + x = 2x is not always true as you have demonstrated. So the Bing API has limitations of modern computer science as you have described above in addition to the rounding and converting most likely in the API.

62
Flat Earth Theory / Re: Are plane tickets real?
« on: April 28, 2020, 06:48:49 PM »
You also have to figure out the difference between pure math, and actually calculating it with physical hardware. In the real world you will have rounding inaccuraces no matter what base you use.

Again it depends on the base. In base 10 .1 is not an infinite number.  in base 10 .1 + .1 = .2. No rounding whatsoever. No inaccuracies whatsoever.  so .1 + .1 is different in base 10 than it is in binary.

Do you think base-10 has some magic properties, or that it is what real numbers are, and binary is somehow fake?

No just that match in base 10, as has been demonstrated in previous posts, is different than math in bindary.


There is nothing special about base-10. We just picked it. Any other base works equally well.
binary sure seems to have some issues with adding .1 and .1



There is no such thing as a "binary version' of a formula.  I am not sure how else to explain it. X+X has nothing to do with any bases.

lets test this formula x + x = 2x with the number .1

in base 10:
.1 + .1 = .2


Now try this: https://jsfiddle.net/jbcq3x95/.  0.1 + 0.1. You get:

0.1 + 0.1 = 0.2000000000000000111022302462515654042363

in binary
x + x <> 2x



There is no such thing as a "binary version' of a formula.  I am not sure how else to explain it. X+X has nothing to do with any bases.

the example above suggest otherwise




 In maths you can write c = 2πr and that's an exact statement, but if you want to make an actual calculation using that equation, you need to assign a value to π and you just have to accept that value can't be exact, because however you


We're not talking about an infinite irrational number like pi. We are talking about .1 and mathematically those two numbers are very different.

63
Flat Earth Theory / Re: Are plane tickets real?
« on: April 28, 2020, 02:57:06 PM »

That statement makes no sense, and shows you don't understand some basic math concepts.

A formula works no matter what base you use.  Binary, decimal, hexadecimal, those are ways of representing numbers. A formula or equation doesn't care which you pick. There is no 'Decimal Haversine ' or 'Binary Haversine' formulas.

Example Equation: X+X=2X


WRONG this has been shown by the post below:


Now try this: https://jsfiddle.net/jbcq3x95/. Put in 0.75 for A and 0.75 for B and press the "Add" button. As expected the answer is exactly 1.5, but now try 0.1 + 0.1. You get:

0.1 + 0.1 = 0.2000000000000000111022302462515654042363

So what's going on here? Computers work in binary. The number 0.1 in binary is 0.0001100110011[0011 repeated forever]. It's a simple number to deal with in base 10, but not in base 2, because you need an infinite number of bits and you don't have that, you actually have 53 (in a typical modern computer). That's why, when you add 0.1 and 0.1 together on a computer, you don't get 0.2 unless you round the answer.

Reciprocal powers of 2 in combination will always be fine, so 1/2, 1/4, 1/8, 1/16 etc. That's why 0.75 + 0.75 is exact because it's (1/2 + 1/4) + (1/2 + 1/4) and these are all reciprocal powers of 2.


in binary x + x does not always equal 2x.





Saying haversine doesn't use binary numbers is a non sequitur, you can equally say haversine doesn't use decimal numbers either.

Online is a binary version of the haversine formula. The formula that you discussed in your post uses the traditional base 10 number system.

64
Flat Earth Theory / Re: Are plane tickets real?
« on: April 27, 2020, 02:47:39 PM »
0.3333333333.......
0.6666666666.......
----------------------
0.9999999999.......

No matter how many digits you pick, the answer is 0.999..... etc. The only way you can ever get the correct answer from this is if you round the answer up. If you insist on never rounding, you can never make this add up to 1.

It was 7th grade math when I was taught that .9 repeating = 1

https://www.purplemath.com/modules/howcan1.htm


0.1 + 0.1 = 0.2000000000000000111022302462515654042363

So what's going on here? Computers work in binary. The number 0.1 in binary is 0.0001100110011[0011 repeated forever]. It's a simple number to deal with in base 10, but not in base 2, because you need an infinite number of bits and you don't have that, you actually have 53 (in a typical modern computer). That's why, when you add 0.1 and 0.1 together on a computer, you don't get 0.2 unless you round the answer.

Reciprocal powers of 2 in combination will always be fine, so 1/2, 1/4, 1/8, 1/16 etc. That's why 0.75 + 0.75 is exact because it's (1/2 + 1/4) + (1/2 + 1/4) and these are all reciprocal powers of 2.

This is a good logical argument which presents more evidence that the original haversine formula is different than the formula use by bing because the original haversine formula does not deal with binary numbers!

65
Flat Earth Theory / Re: Are plane tickets real?
« on: April 23, 2020, 04:43:35 AM »
He's nitpicking over rounding distances to the nearest cm.

This is math. If I put two numbers onto a website which says that it adds two numbers and I put the number 1 in twice and the answer is 2.0000000005 then the code that's running on that website, VERY VERY clearly is not adding two numbers. If it was then the answer would have been 2.0000000000. So when it comes to mathematical functions like this the results of a formula like haversine can only have one answer.

If I took a math test and I put 1 + 1 = 1.9999999999999999999999999999995

the answer is WRONG. I get an F on my test. My math teacher is a troll! Nit picking over such a small variance!!!!! I guess every math teacher and match major, and engineer is a troll.


I was pretty sure he would not (at least publicly) change his mind, but perhaps in private, we've introduced a little uncertainty, who knows.

I have changed my mind. At the beginning of this conversation

When the discussion about the red pin distances started:
I was only 55% sure that the Bing red pin distance was based on the haversine formula. Access to the bing API will be able to increase that percent.

At this point:
I'm like 65% sure that the Bing red pin distance is based on various algorithms one of which appears to be based on the haversine formula with some rounding involved. Access to the bing API will be able to increase that percent.

The fact is, after all of this, ALL of you should be fairly confident that the bing API is not 100% haversine. It's VERY clear that there is rounding and converting going on behind the scenes.



iamcpc was trolling all along Someone who calls rounding distances on a map to the nearest cm "creative rounding" just cannot be serious.


If you think i'm a troll or lying then please stop responding to me. I'm here trying to engage people with an open, yet skeptical, mind.

66
Flat Earth Theory / Re: Are plane tickets real?
« on: April 21, 2020, 09:58:08 AM »
There is still this issue of rounding which is very unclear to me. Is the variance on these short distances 0 because they are rounded down to the nearest KM which is 0 KM? If so then this is overwhelming evidence that the Bing API is not based on the haversine formula because the haversine formula does not include any rounding.

The answer is that Bing uses the haversine formula and then rounds down. You can see they round down using the measurement tools, they always show exactly one decimal place of accuracy. It will show 2.4km, not 2.412834756384976529385465362783664578234km.

The script that was posted does this, and matches EXACTLY the results Bing does.

I'd say getting the exact results over two hundred million calculations is pretty solid evidence the methods are the same.



They were not the same until we did some creative rounding. I could make a distance formula and round it to the nearest light year. I could measure the length of my roof with a tape measure and round it down to 0 light years and it would match the haversine formula. Does that mean I used the haversine formula to measure my roof? No I used a tape measure.



And now we're back to silence, tumbleweed, nothing, nada, no response.

Dude you have gotten many many responses. It's hit an impasse. We're trying to guess at what the Bing API is doing without seeing the source code. The only thing that I have learned is that, if the bing API does use the haversine formula, it does some pretty creating rounding.


In other words, their getDistanceTo method isn't directly an implementation of Haversine

Hmmm welcome to what I've been weary of this entire time....


it is a method which uses an implementation of Haversine. It clearly does other things as well. For example you can ask it to return the distance in a number of different units: feet, kilometres, metres, miles, nautical miles or yards. It also rounds to the nearest cm. Just to be clear, haversine neither rounds nor converts, but the getDistanceTo function, which uses it, does both.

exactly why we need to see the source code to know for sure. These exercises have just shown that, without the source code, it's very difficult to know what exactly is happening.

67
Flat Earth Theory / Re: Are plane tickets real?
« on: April 20, 2020, 04:29:12 PM »

Comparison between 200000000 locations
Min variation 0.0mm
Max variation 0.0mm
Avg variation 0.0mm
Min variation(%) 0.0
Max variation(%) 0.0
Avg variation(%) 0.0
Min dist 0.10001km
Max dist 0.39999km
Avg dist 0.25km

i.e. Bing maps API distance calculations correlate 100% with an independently developed Haversine formula having compared distances between 200 million random pairs of locations.

So the jury have come back in...

On the charge of Bing documentation having been accused of being accurate when they assert they use the spherical Haversine formula for distance calculations - guilty as charged due to overwhelming evidence. Bing uses Haversine for distances.

On the charge of Bing maps distances having been accused of being "based on measured distances in our 3d world" (i.e. incorporating elevation changes) - case dismissed as the prosecution failed to provide any evidence whatsoever.

And now we're back to silence, tumbleweed, nothing, nada, no response.

There is still this issue of rounding which is very unclear to me. Is the variance on these short distances 0 because they are rounded down to the nearest KM which is 0 KM? If so then this is overwhelming evidence that the Bing API is not based on the haversine formula because the haversine formula does not include any rounding.

68
Flat Earth Theory / Re: Are plane tickets real?
« on: April 14, 2020, 04:53:33 AM »
I ran it for 100 pairs at 0 to 10 km. It took a really, really long time to run. But when it completed, the results are as predicted (Chrome 80, Mac 10.15.3):

the issue that I have here is that the only way you were able to make them match was by rounding the number. The issue with that is that there could be one distance which is 1.1 KM away from another distance. When you round to the nearest kilometer we are unable to see those kinds of differences as demonstrated before when the numbers were different and you were not rounding.

69
Flat Earth Theory / Re: Are plane tickets real?
« on: April 13, 2020, 09:19:43 PM »
Seems to be working fine for me.  Chrome on Windows 10.

It looks like it's because I made some changes to the minimum and maximum distances. I wanted to try a few distances that were between 8 and 10 KM or a few that were between .1 and .4 KM. It ran for 10 minutes trying to do one comparison with a min distance of .4 and a max distance of .4. Very strange that this thing is unable to do smaller distances.


I feel like, if we are going to compare distances, the smallest distance should be something less than 756 KM. Why is it that we are unable to do 100 samples of 0-1 KM and 100 samples of 2-10 KM etc.

70
Flat Earth Theory / Re: Are plane tickets real?
« on: April 13, 2020, 03:55:52 PM »
It occurred to me following my last post that the results given by the independent implementation of Haversine and Bing are so very close that perhaps there was an extra step I could take to eliminate the difference altogether. I had another look at the rounding idea and realised that I'd converted a result to km and then rounded it, so out of interest, I tried this the other way around, i.e. round first and then convert to km.


Code is included as an attachment to this post as before. Instructions to run as per my earlier post.


I'm not getting any results. I got the website, I put the code in, i hit the play button and nothing happens. I'm only trying to do 100 locations. It just says "Page Unresponsive". What browser are you using to do this?

71
Flat Earth Theory / Re: Are plane tickets real?
« on: April 12, 2020, 02:28:24 AM »

Well lets use millimeters then. A=1,000,000mm, B=1,000,000mm, what is the exact value of C?

I'm not asking for the EXACT value of C i'm asking for the correct answer down to the millimeter. Which your information has CLEARLY demonstrated that the calculations are not the same providing VERY clear evidence that the claims made on the Bing website are not 100% accurate. Or they are vague intentionally.










Again, absurd. Why? What's the motive? Do you believe that everything you've ever read in a book, in a manual, on the web, on a street sign, is subject to the same level of skepticism you're applying here to Microsoft's own documentation about its own product? Absurd.

You really can't say these claims are absurd when, per your claims, this happened to you in real life. I could say that your claims are absurd but that happened to me too.  This is an example of how you are wrong.



Just because there are websites, newspapers, magazines, books, etc., that claim there are Lizard people you somehow extrapolate that notion in some equal manner to Microsoft documentation about its own product? Absurd.

Have you not seen the comparisons? They are not the same. They are different. Yet you still make these claims. This is another example of how you are wrong.

Professionally putting inaccurate information out to the public is by no means professional. You possess a certain moral flexibility that I do not. I hardly see your lack of ethics as any argument over the rest of humanity even if you found some like minded individuals at a conference. It's not an argument for anything, just a statement about yourself and your integrity.

Hmm. Professional:
engaged in a specified activity as one's main paid occupation rather than as a pastime.
I got paid to put incorrect information on a website as part of my main paid occupation rather than as a pastime therefore I did it professionally.
A third example of how you are wrong.



Just face the facts and all evidence (of which you have provided none) that Bing Maps uses spherical trig in it's distance calulations. Case closed.

Then tell me why the numbers don't match from another website who claims to use the same formula?

72
Flat Earth Theory / Re: Are plane tickets real?
« on: April 11, 2020, 07:59:12 PM »
And just to take your example of the hypotenuse calculator, what exactly is C going to be if A=1 and B=1? Actually I'll let you off if you give me the first 100 million digits of the answer. According to WikiPedia the current best answer to this question is from a guy called Ron Watkins who has worked it out to 10 trillion digits, so I'm really letting you off lightly you know.

 If the hypotenuse calculator used distances of over a billion millimeters  the answers would match down to the millimeter. In this situation they do not match when measuring distances of significantly less than a billion millimeters. How you are unable to understand that this is math and when putting variables into a formula there is only ONE possible correct answer. The answer is correct or incorrect.

If variables are plugged into formula A and the answer is 1 and then plugged into formula B and the answer is 1.000005 then they are NOT the same formula. Period. Case closed.


The absurdity here is that you have made up a whole "What if..." scenario based upon zero evidence. For one, just because you did something unethical when asked to do so by your CEO you believe that others would do the same.

I've been developer conferences and spoken with other people who have also knowingly published incorrect information to websites.

For two, this entire scenario you've conjured up is ridiculous. Your argument is, what if Steve Balmer was hovering over the Bing Maps technical writer's cube and saying, "Ok, there, when you're describing the GetDistance API put something in there about using a Haversine calculation, I know it doesn't, but do it anyway because I said so..."

No. My scenario is that the VP(or CEO or Director)  over the web developer team said: "Put this block of text on the website" and the web development team said "sure. No problem". 


That is a completely manufactured scenario based upon not just zero evidence, but zero motive. Like I said, absurd.

Seriously? There are websites out there claiming that the news is read by lizard people. I say yeah don't trust everything that you read on the internet and find out for yourself. I've professionally put inaccurate information on a website before.

You're response, is actually defending these claims having done no research on them whatsoever, even after experimental evidence has been presented which shows that the distances from website A's haversine formula calculator don't match the Bing website "haversine" formula calculator.






73
Flat Earth Theory / Re: Are plane tickets real?
« on: April 10, 2020, 03:36:04 PM »
  • With the "TypeScript" tab selected and highlighted in green, delete the existing script code and paste in the code I've given you.

You have given me no code.

I encourage you to try this for yourself and examine the code.

I can't. You have not given me any code.


Obviously since the locations are randomly generated, each time you run, you should expect to get slightly different results, but the overall picture is the same, no more than a 5mm discrepancy between distance of up to 20,000km. There is no doubt. Bing uses Haversine.

Are you serious?

It's like saying this online hypotenuse calculator uses the Pythagorean Theorem. If you plug in A and B then the C only has one answer. One very precise answer. Only one.  If you plug in a hundred billion sets of data into this calculator they will match the EXACT distance down to the one spetillionth of a nanometer 100% of the time. Regardless of the distance.


It's like plugging the number 3 and 4 into this thing and having it spit out 24.9999995 Well then that's irrefutable PROOF that this thing is not using the Pythagorean Theorem because if you put the numbers 3 and 4 into the Pythagorean theorem the answer for the hypotenuse is 25 not 25.0000005 not 24.999998.


I think that it's clear that Bing maps is using something pretty similar to the Haversine formula but pretty similar is not the same just like if you plugged 3 and 4 into a  Pythagorean Theorem api and got the number 24.9999995 then it's using something similar to the Pythagorean Theorem but NOT the Pythagorean Theorem

74
Flat Earth Theory / Re: Are plane tickets real?
« on: April 10, 2020, 07:24:38 AM »
You have obviously not worked at a large company and been responsible for web content as that is a completely different animal. I was a Dir of Prod Development for the web (one of a dozen or so) for a a fortune 250 company for several years. When my team produced any sort of documentation, whether simple help menus to full on dev 'how-to's' when interfacing with our data, API's and product, whether the documentation was customer facing or internal, it all had to go through many, many vetting stages. Internally on my team to make sure the documentation was accurate, well written and understandable. Then off to Legal and compliance for their review to make sure nothing was open to a mis-interpretation/liability. Even Marketing would have to "blue line" (provide approval) to make sure we were 'on Brand'. Nothing was ever published that didn't pass all of these barriers - All of which is standard practice at any large firm. Whether it be an Adobe, a Fidelity or a Microsoft. It's not the wild west like a little start-up may be. I find your argument that someone at Microsoft could go rogue and publish something that was patently false laughable. And then you'd have to summon up some sort of motive. Why would they make a false claim that they use spherical trig in their calculations when they actually don't? That makes zero sense.


Are you serious? You just said this:

My CEO wanted traffic numbers for a board meeting a press release. We were seeking round C funding as the runway was getting short. I gave him the traffic numbers and he asked me to "gussie" them up.

I don't know what company you worked for but in every company I worked for if the CEO told you to do something, and it was not a felony, you did it. If the CEO says jump you say "How high". If you can't understand how, after having something like this happen to you, someone else might say "yes boss" i'm very sorry.


Why don't you do a little leg work and create some samples to see for yourself?

Because what formula is, or is not, used to estimate the distances between two red dots on an online map is not high on my list of things to work on.

75
Flat Earth Theory / Re: Are plane tickets real?
« on: April 09, 2020, 11:29:30 PM »
I have worked extensively in web design and your posit is more of a personal ethical one rather than evidence of human behavior at large. I was Director of Product Development at a small start-up a few years back. My CEO wanted traffic numbers for a board meeting a press release. We were seeking round C funding as the runway was getting short. I gave him the traffic numbers and he asked me to "gussie" them up. The operative word was 'up'. I refused because that would be just out and out lying and people might make some serious life altering financial decisions based upon falsified data. He relented and we went with the correct numbers I had. That's the ethics of the scenario and I trust that more of humanity follow that path rather than doing something nefarious just because someone senior asked them to.

Then you know, first hand, how incorrect or inaccurate things can make it to a website.




As to the larger question at hand, your need to see the source code and have someone walk you through it in order to believe that the documentation is correct, literally applies to every citation anyone ever has about anything. That seems extreme, unfounded, and unfortunate.

Just like it seems extreme unfounded and unfortunate to believe everything that you read on the internet. I prefer to take things I read online with a grain of salt.

76
Flat Earth Theory / Re: Are plane tickets real?
« on: April 09, 2020, 08:42:43 PM »
Well isn't this the very thing I offered to do to convince you the documentation was accurate? I've already offered to write a test using 1 million data points, comparing Bing "red pin" with an independent implementation of Haversine. If I do that and the results support the documentation, will you then "believe that the red pin distances were based on the formula"? I'm still willing to do this if you want, but I don't want to waste my time if it doesn't get us anywhere.

If you had 1000 data points in which the results matches 1000 times out of 1000 the haversine formula then I would think that the bing map red pin distance calculator was based off of the Haversine formula



Sure, but in your example, your CEO told you to write something, you did, so the change was authorised all up the line. Of course a senior manager at Microsoft could do the same and in fact I can't see any other way this could happen. If the change was unauthorised, it would eventually be fixed and someone would be disciplined.

Authorized <> correct. Just because something was authorized does not make it true, accurate, or correct. It's very clear you never worked in web design because you would know that it's more common than you think it is.




Well how do you know they get the information from a Pilot. How do you know the pilot is giving correct information? What makes a pilot trustworthy? How do you know the ASI is giving an accurate speed? There's a whole chain of trust in there that you don't seem at all interested in questioning, yet in other areas you distrust what to everyone else seems rock solid evidence.

You take multiple samples. You track multiple flights. If everything all points to about the same number then you can formulate that you are most likely correct.

Yes I do believe the distance is between 5000 and 6000 miles

I take my hat off to you. You've built an entire belief system based on a staggeringly varied set of criteria for your standards of evidence





I'm using the range of cruising speeds quoted for this type of aircraft. I have no personal experience of that route.

Then I strongly suggest you get more accurate numbers instead of just making some up or estimating them.  There might be flight tracking websites. You might be able to call the airline and ask what the average cruise speed is.

Now lets have a look at Bing maps. You've used this for 15 years, never knew it had a distance measuring tool ("red pin"). Took me all of 5 minutes to discover that and I'm not a Bing user.

If you're not a Bing user then how are you using Bing to measure red pin distances?

Apologies, I should have been clearer. I'm not normally a Bing user, I've only recently started using Bing in order to address these Bing related topics.



I was under the impression you had made measurements whilst walking and based your trust in Bing maps walking distances on measurements you took. Sure you can use all sorts of methods, which ones did you use is my question?

I have used a use a rolling measuring tape, GPS, I've driven a route that I've walked along the street and used my Car odometer, I've used wearable fitness trackers, and for a while I wore a pedometer which also tracked distance.



But you've no idea whether elevation changes make any significant difference, you just think it does and you're not providing any evidence. I don't believe it does.

If i'm changing in elevation my odometer is tracking that change in elevation too.






Well now we're back to my offer to demonstrate 1 million comparison calculations (see my earlier comment).

I have yet to see even a sample size of one let alone 1 million.

77
Flat Earth Theory / Re: Are plane tickets real?
« on: April 09, 2020, 03:44:01 PM »
I take my hat off to you. You've built an entire belief system based on a staggeringly varied set of criteria for your standards of evidence.

Do you not believe that the distance between LA and Tokyo is somewhere in the neighborhood of 5000-6000 miles? If you do then it sounds like you've built an entire belief system based on a staggeringly varied set of criteria for your standards of evidence.

You won't believe a shred of evidence from the official Bing documentation

Yes I would. If their website said their calculation was based on a formula and someone set up a set of data points, say 100,  which were based on the formula and compared those to 100 red pin measurements from Bing and all of them matched then I would believe that the red pin distances were based on the formula.

If Bing shared their source code and documentation about it then I believe the claims made by the Bing website.


If you Bing says the sky is yellow that is not evidence that the sky is yellow.

A claim made by a website on the internet <> evidence

because anybody could have written or changed it, whereas in reality it is likely that only a few dozen people in the world will have the necessary security permissions to permit that and they will all be subject to scrutiny from their peers and line managers, so the likelihood that this documentation is anything other than what Microsoft intend it to to be is non-existent.

I've already stated, multiple times, that I've developed websites at the request of the CEO which contained incorrect information. You don't seem to understand that this DOES happen.


By that standard, you can't ever believe anything anyone has ever written anywhere because anyone could have written it or changed it.

Like in school I'm reading these books and the teacher is demonstrating how the claims in the book are accurate. They are giving specific examples, drawing diagrams, and effectively DEMONSTRATING that what is in the book is at least somewhat accurate. Even so there are many documented cases where stuff makes it into the text books and gets taught by teachers which is 100% a LIE like w/ Germany and the holocaust. Or in North Korea where they teach, in textbooks, that children are kidnapped and forced into slavery by Americans.

But when it comes to the distance from LA to Tokyo, you can just get the necessary information to work it out online or from a couple of people you know or you just ask a flight attendant (so where do they get their information from?). This is your standard of evidence gathering now is it?
They get their information from a Pilot who gets his information from the speedometer. Based on this I believe the distance between Tokyo and LA is between 5000 and 6000 miles. Do you disagree?

You claim a non-stop flight time between 10 and 11 hours between the two airports. I just checked flightradar24 and quickly found a couple of examples, one was just over 11 hours, the other 9 hours 15. They both use a Boeing 777 which has a cruise speed in the range mach 0.84-0.89. Now cruise speed varies with altitude and temperature and ATC may assign a common speed for separation in busy periods, so the aircraft might not be able to fly the speed they ideally want, but lets work some approximate figures out.

Cruising at 40,000 feet, mach 0.84 equates to 554mph and with a 9 hour 15 flight time, that gives a distance of ‭5,125 miles.

Cruising at 30,000 feet, mach 0.86 equates to 583pmh and with an 11 hour flight time, that gives a distance of 6,413 miles.

So that's 5,769 miles +/- 644 miles, i.e. +/- 11%

Plus or minus eleven percent! That's a level of accuracy you're comfortable with? The answer is certainly correct, the actual distance is 5487 miles, so well inside the range just calculated.

On those flights did the Captain announce the cruising speed or are you just making one up? If the captain did not announce a cruising speed did you ask the flight attendant what the cruising speed was or are you just making it up?

Now lets have a look at Bing maps. You've used this for 15 years, never knew it had a distance measuring tool ("red pin"). Took me all of 5 minutes to discover that and I'm not a Bing user.

If you're not a Bing user then how are you using Bing to measure red pin distances?


You start off saying you trust Bing maps, now you've backtracked somewhat and you trust just the driving and walking distances. Out of interest, how do you measure walking distances, surely not with a GPS device?

There are many different ways. You can use a rolling measuring tape, GPS, you could walk along a road where you can use an odometer, you can use a bicycle odometer.

 But Bing maps covers the whole world, most of which is covered in water, so what you are really saying is you trust Bing maps for the 30% of the earth which is dry land, but only the bits which have marked roads or tracks you can measure.

You claim without offering any evidence whatsoever that Bing maps distances (i.e. the ones you trust) are based on real world distances which include taking elevation into account. Where do you get this from?

From comparing predicted driving distances to my odometer when driving up and down steep hills in San Francisco multiple times.


Of course none of this proves anything about how Bing actually goes about calculating driving or walking distances, but it certainly suggests that simply using the "red pin" method to calculate each segment of a path is giving the same answers.


And we've already established to everyone's satisfaction apart from yours that "red pin" is Haversine and Haversine is based solely on spherical trigonometry.

Show me one shred of evidence other than "This website says it so it must be true". Please keep in mind that I've personally developed websites at the request of the CEO which contained incorrect information. You don't seem to understand that this DOES happen.

78
Flat Earth Theory / Re: Are plane tickets real?
« on: April 08, 2020, 11:43:20 PM »
You are happy with the distances between California and Japan, so if I asked you what is the distance between say San Francisco airport (SFO) and Tokyo airport (HND), what is this figure? Where did your information come from? Why do you trust this source? If for some reason you can't give me that specific figure, then give me an alternative trustworthy figure (plus source) for any two places in California and Japan.

Follow up question, can you explain how you check that distance on Bing maps? i.e. can you talk me through how I would do that. Obviously I could use the "red pin" method, but you have some doubts about that, so how else can this be done?

You can fly nonstop from LA to Tokyo in like 10-11 hours. 

If you know what type of plane you are on you can estimate the top speed of the plane with information online.
In addition I know a couple of people who work on planes who have corroborated the speed information about the planes found online.
In addition each plane is equipped with something that can measure speed.
If you are in a large passenger plane and not allowed into the cockpit to see the speedometer you can ask a flight attendant what your cruising speed is.

You take your miles per hour speed estimate and multiply the number of hours spent flying to come up with a distance estimate.

You can do the same for shipping times although I've never taken a ship to Japan. I trust that hundreds of thousands of people who have done international shipping have done this.

79
Flat Earth Theory / Re: Are plane tickets real?
« on: April 07, 2020, 03:22:22 PM »
I take it from this that you now have doubts about the accuracy of the "red pin" distances, on the basis that you've not personally tested them. This makes the whole exercise of trying to persuade you of the underlying method (Haversine) rather pointless if you aren't going to believe the results it gives you are accurate. In fact you now seem to believe only driving and walking distances are to be trusted. This does not fit with your earlier statements on the accuracy of Bing maps distances...

When I made my previous statement I was unaware of this red pin distance. Furthermore I have not witnessed or experience anything to determine the accuracy of the red pin distance.

This blog says that the distance is calculated using the Bing Maps Route API. There is no way for me to corroborate if this is correct or not.
https://blogs.bing.com/maps/2017-10/bing-maps-distance-matrix-api-launches-today


Here you mention flights and shipping. As far as I am aware you can't drive or walk across oceans, yet here you claim these distances are correct in Bing.

You've been shown many examples of these "red pin" distances before in this thread, as far back as page 3, yet this is the first time you've cast doubt on their accuracy.

The distances between California and Japan are verified by the thousands and millions of people who travel between those two places every year. The distance between California and Japan is not the same thing as the calculated distance between red dot A and red dot B using an unknown distance calculation formula.



Here stack has showed you a "red pin" distance. You've not challenged the accuracy, you seem quite happy to accept it is correct and that it simply "is the distance between those points". Have you changed your mind?

I'm not challenging the distances because I have no reason to think they are incorrect. I also have no reason to KNOW they are correct. Furthermore I have not witnessed or experience anything to determine the accuracy of the red pin distance.

80
Flat Earth Theory / Re: Are plane tickets real?
« on: April 05, 2020, 06:14:03 PM »
OK, so you're now willing to at least entertain the idea that the Bing API internally uses the Haversine formula (or something similar)

I've always been willing to entertain the truth. Unfortunately, in this situation, I don't know the truth.

so no need to attempt demonstrate this to you any more.

I thought your goal was trying to change my opinion from:

"I don't know if the information on the HTML document about Bing Maps is correct or not."
to
"I think the information on the HTML document about Bing maps is correct"

Is it very clear that Bing maps uses multiple different distance algorithms? How do you reach that conclusion? What are these alternative algorithms? Why would you need them?
There is the longitude and latitude red pin distance calculator. (I have not corroborated those distances)
There is a driving distance algorithm (I have used the odometer on my car to corroborate this one)
There is a walking distance algorithm(I have used various map walking trackers and the odometer on my car to corroborate this one)


You've said many times that you consider Bing maps to be accurate, so what's your position now, is it always accurate, usually accurate, sometimes accurate?

The driving distances, based on the extensive driving that I've done, appear to be mostly accurate.
The walking distances, based on the small localized area that I walk, appear to be mostly accurate.
The mass transit distances I've never tested.
The red pin distances I've never done any testing on and I have no idea if they are, or are not, accurate or how they are calculated.

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