59-60 second Coordinate issue

Question

everyone, who read this.

I found an issue that latitude or longitude of geocoordinate with, for example, 2 minutes and 59 seconds, after converting to decimal format, has value "0.049722", but

2 minutes and 60 seconds has value "0.35", but I thought it must be equal to equal to
3 minutes and 00 seconds, that has value "0.05"
3 minutes and 00 seconds, that has value "0.05"

But again 2 minutes and 61 seconds, that has expected value "0.050278"

Is it global geocoordinate issue or online converter issue?

I use http://the-mostly.ru/konverter_geograficheskikh_koordinat.html

Thank you, @kvantour. So 2 minutes and 60 seconds that has value "0.35" is just error of implementation of online converter ? — Vadim Ostanin, Apr 02 '19 at 07:21
0.35 degrees is for sure wrong! If you use the inverse conversion, you notice it converts it to 21 minutes. So yes, the site is wrong! — kvantour, Apr 02 '19 at 08:38

kvantour · Accepted Answer · 2019-04-02T08:51:14.307

When looking at the source of the respective website, you notice the following line:

if (LAsec==60) {LAsec = 0;LAminutes = LAminutes+1;}

Since LAminutes is still a string, this represents a string concatenation, so 2 is converted to 21 instead of 3.

See: javascript (+) sign concatenates instead of giving sum?

In short, the website is very wrong!

Maybe you should use WolframAlpha for this: https://www.wolframalpha.com/input/?i=0+deg+2%27+60%22+N,+0+deg+E

59-60 second Coordinate issue

1 Answers1