Dead straight lines on hitmaps.

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lmviterbo
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Re: Dead straight lines on hitmaps.

Postby lmviterbo » Sat Aug 08, 2015 3:36 am

The analysis of "how straight a hit-line is" is in fact interesting, and I wonder what are the straightest lines so far. (Notice that, on the hitmap, a line may be dead straight even if the coordinates are not that similar; also, with very similar coordinates, an unlucky hit may have a line that is not dead straight — I also wonder if anyone can find one of those.)

Actually, your figures are not correct, vermeer, because you compounded the distances at the origin instead of measuring the distance at the destination, as it should be. What you want to measure is "if the note went vertical / horizontal, how far would it be at the destination?" A very good measure for that is the "Initial bearing" of the link you provided.

So, for the hit you linked to (Singen to Reinheim), the distance is 413 m and the Initial bearing is 359.897º (that is, a 0.0286% slope). For the Finland to Greece one, the numbers are 3,019 m / 179.9352º / 0.0360%. For the Galway to Groningen one, it's 5,231 m / 84.0092º / 6.6564%.

Of course, it's only minor differences from your numbers and the same idea remains: that your Galway to Groningen hit is not that impressive. :)

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Dioniz
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Re: Dead straight lines on hitmaps.

Postby Dioniz » Wed Aug 12, 2015 5:11 am

It seems that this hit is really dead straight line: :flag-si: Ljubljana - :flag-mt: Floriana https://si.eurobilltracker.com/notes/?id=94338896
My first point is in Prešeren Square, right in the center of Ljubljana (46.05141, 14.50613) and second in Floriana center (coordinates from Wikipedia: 35.89333, 14.50583).
If we take into consideration exact places where notes were found (see comments) we will get a few hundred meters big deviation:
- Ljubljana (46.07795, 14.49044);
- Floriana (35.88957, 14.50727).
But still dead straight for 1130 km I'd say.
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lmviterbo
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Re: Dead straight lines on hitmaps.

Postby lmviterbo » Thu Oct 01, 2015 3:27 am

Found a new record.

Longest horizontal dead straight line:
http://eurobilltracker.com/notes/?id=111880581 BE → PL
1252 km
51.263, 22.5658 :flag-pl: Lublin (20-093)
51.2876, 4.4865 :flag-be: Brasschaat (2930)

Updated my post and map accordingly (included also some other recent finds).

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Ludwigsfeld
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Re: Dead straight lines on hitmaps.

Postby Ludwigsfeld » Sun Jun 26, 2016 11:13 am

I can give you this nice hit from :flag-de: to :flag-it:
https://de.eurobilltracker.com/notes/?id=164425446

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Re: Dead straight lines on hitmaps.

Postby vermeer » Fri Sep 02, 2016 10:27 pm

Have some questions, but it is a nearly straight line.

https://nl.eurobilltracker.com/notes/?id=168056266

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Re: Dead straight lines on hitmaps.

Postby ludofaki » Tue Jan 03, 2017 8:14 pm


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Re: Dead straight lines on hitmaps.

Postby Ludwigsfeld » Sun Jun 04, 2017 9:15 am

Another hit i made today:
from Retz :flag-at: to Böblingen :flag-de:


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