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Longest Lines of Sight on Earth

beyondhorizons.eu

81–90 of 164 posts

Re: Longest Lines of Sight on Earth

#81
Reminds me of a habit I have which made me end up on tops of mountains occasionally. I guess the algorithm can be called "observable ascent":

1. Look around 2. Find a relatively close high spot that is visible 3. Plan and climb on top of it 4. From the peak, find the next highest spot visible 5. Repeat

Also works for other topologies.

Re: Longest Lines of Sight on Earth

#82
The link in the "done" column doesn't work - it should point to

https://beyondhorizons.eu/2016/08/03/pic-de-finestrelles-pic...

It's a report how they made an actual photograph of a sunrise over 443km far. Quite amazing!

BTW if you ever get the chance to go up Mt. Canigou, go for it. Since it's the first big mountain in Pyrenees from the east you have really spectacular views and it's not that difficult to hike up there. Plus they brew great beer (from iceberg water they say) in the refuge just under it.

Re: Longest Lines of Sight on Earth

#83
post #13

Surely the longest distance would be, from the top of the highest point on Earth (top of Everest), to the horizon?

Here is what you can see from Mt. Everest on a map.

http://i.imgur.com/F8SqEj9.png

Reddit discussion: https://www.reddit.com/r/MapPorn/comments/6ofr5y/locations_y...

Re: Longest Lines of Sight on Earth

#84
post #62

Earlier quoted context omitted.

I guess that makes sense. I was just confused for a bit because I wasn't sure if the height was in in thousands of meters or miles (but if miles, it was odd in comparison to the kilometer distances). I looked up Mt. McKinley and converted the foot rating to meters to confirm that it was indeed thousands of meters, but the process got me wondering if page was mixing locale formats, or whether the my assumption that it…

In mainland Europe we only use the metric system, even when speaking or writing English. Also it is common to stick to the comma as decimal separator and dot as thousands separator when writing English. This convention is independent of the language used. Same goes for date notation, dd-mm-yyyy is used (almost) always. In Windows or Linux for example you can select the English language with Dutch localisation. It's u…

In the UK, we use dd-mm-yyyy anyway, and metric for most purposes. Only the decimal comma differs from normal non-American English usage.

Re: Longest Lines of Sight on Earth

#85
post #78
post #57

Earlier quoted context omitted.

The version I got, in a tech company interview, was how much longer would you need to make the rope to allow a cat to go under it. They were basically just look for 2 x Pi x Cat in this case.

That question is ambiguous. If you only need a single cat to go under the rope at some point, you just add a small arch for the cat to walk through. This requires a length of rope somewhat less than twice the height of the cat. 2 x Pi x Cat would levitate the rope by the height of the cat along the entire circumference of the Earth, allowing a billion cats to go under it simultaneously. You could even make do with no…

The answer to the first interpretation is considerably less than twice the height of the cat, and I think it's an interesting result as well:

Assuming a 0.3 meter high cat, you only need ~0.12mm of extra rope (about the width of two sheets of paper) to be able to pull it up at a point and let the cat through.

Re: Longest Lines of Sight on Earth

#88
post #87

OT: Is there an application that can generate panoramic view from some point of Earth based on map and altitude data (e.g. OpenStreetMaps)?

FYI OSM doesn't (really) store elevation data. Individual mountain peaks are often mapped, and tagged with the elevation. But OSM doesn't store land contours like that.

There are some free, open, datasources for that, like SRTM[1], ASTER[2] (and maybe OpenDEM[3], but I don't know what that's like)

[1] https://wiki.openstreetmap.org/wiki/SRTM [2] https://wiki.openstreetmap.org/wiki/ASTER [3] http://www.opendem.info/

Re: Longest Lines of Sight on Earth

#89
post #32

Mt. McKinley (6.194 m.) What country uses '.' as the thousands separator but speaks English? Or is this someone mixing their native language thousands separator with English? Or is there some weird interaction between country and language that makes this the preferred, or at minimum an acceptable standard form? I'm actually hoping it's one of the latter options, that would be something new to me.

.eu suggests this website was not created by native English speakers.

There are at least 3 EU countries which have English as an official language. Even after Brexit, there will be millions of English-native speaking people living in places where English is an official language.

Re: Longest Lines of Sight on Earth

#90
post #51

Earlier quoted context omitted.

.eu suggests this website was not created by native English speakers.

The UK and Ireland are (currently) in the EU and it's not uncommon for English-speaking organizations/individuals with a particularly internationalist perspective to use the .eu domain.

English is also an official language of Malta as well.

And Ireland isn't leaving the EU any time soon.

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