[Travel] Interesting maps

Worried Man Blues · Sunday at 1:46 PM

Sid and the Sharknados said:
I think the north pole being at the south pole that recently has more to do with it occasionally flipping over altogether, rather than it's gradual shift across the Arctic as illustrated by that map.

The flipping polarity leaves bands in the rocks in the Atlantic, which I was hoping to illustrate with a thread-appropriate map, but I couldn't find anything that looked remotely clear or helpful on the back of a quick Internet search.

Other fun north pole related fact, Polaris is gradually moving across the sky, so back in Ancient Greek/Roman times it wasn't exactly above the north pole, and in a few hundred years it'll have moved past it.

Wiki says it's gradually moving...........As of early 2019, the magnetic north pole is moving from Canada towards Siberia at a rate of approximately 55 km (34 mi) per year.[ Personally I haven't a clue!!

nickbrighton · Sunday at 1:57 PM

Worried Man Blues said:
Wiki says it's gradually moving...........As of early 2019, the magnetic north pole is moving from Canada towards Siberia at a rate of approximately 55 km (34 mi) per year.[ Personally I haven't a clue!!

the magnetic poles have always moved, basically oscillating "left and right" . In order to read maps correctly you need to take into the account the difference between true north and magnetic north. To be entirely accurate with a map and compass you have to allow for the difference and add or subtract the difference

This changes with time but is different from when the poles flip

he difference between True North and Magnetic North is as follows:

True North is the geographic North Pole, aligned with the Earth's axis.
Magnetic North is where the Earth's magnetic field points vertically downwards, and your compass points towards it. It varies over time and location due to changes in the Earth's magnetic field 1 2 3.
The difference between the two is referred to as Magnetic Variation or Magnetic Declination4.

Flipping magnetic poles, also known as geomagnetic pole reversals, have happened throughout Earth's history 1 2 3. The last one occurred 780,000 years ago 2. These reversals take a long time to occur and pose no immediate threat 2. The Earth's magnetic field is in continual flux, causing the location of Earth’s magnetic north and south poles to gradually shift and even completely flip locations every 300,000 years or so 3

Coldeanseagull · Sunday at 3:28 PM

Cowfold Seagull said:
I prefer a good old fashioned real one, with my mates Ordnance and Survey.

I used to, but now I can flick through all the pages on line without having to lick my finger!

Bodian · Sunday at 4:47 PM

Worried Man Blues said:
This amazed me...the Magnetic North is moving and always has! It used to be at the South Pole in the mammoth era, mucked up their migration I presume!!

View attachment 192484

nickbrighton said:
the magnetic poles have always moved, basically oscillating "left and right" . In order to read maps correctly you need to take into the account the difference between true north and magnetic north. To be entirely accurate with a map and compass you have to allow for the difference and add or subtract the difference

This changes with time but is different from when the poles flip

he difference between True North and Magnetic North is as follows:

True North is the geographic North Pole, aligned with the Earth's axis.

Magnetic North is where the Earth's magnetic field points vertically downwards, and your compass points towards it. It varies over time and location due to changes in the Earth's magnetic field 1 2 3.

The difference between the two is referred to as Magnetic Variation or Magnetic Declination4.

Flipping magnetic poles, also known as geomagnetic pole reversals, have happened throughout Earth's history 1 2 3. The last one occurred 780,000 years ago 2. These reversals take a long time to occur and pose no immediate threat 2. The Earth's magnetic field is in continual flux, causing the location of Earth’s magnetic north and south poles to gradually shift and even completely flip locations every 300,000 years or so 3

You'll have missed this then. In the world of those of us who work with maps on a daily basis, it was quite an event!

Three ‘norths’ combine over GB for first time in history | OS

November 2022 saw geospatial history being made when true north, magnetic north and grid north combine at a single point in Great Britain for the first time ever.

www.ordnancesurvey.co.uk

Fungus · Sunday at 5:03 PM

The OS Maps app is the app I use the most on my phone, by far. Great for planning and recording walks, as well as making them up as we go along. Also great for following (UK) travel documentaries.

The NLS side-by-side maps are brilliant for family history, pinpointing where my ancestors lived. Google maps also has its place for that, but is rubbish for hikes.

Swimboy64 · Sunday at 5:13 PM

Eeyore said:
View attachment 192456

Queen's Park Cricket Ground. An obsession of mine. No pictures exist. Only a couple of references. How it was even level is something I can't work out, given the uneven terrain as it is now.

Looking at that it was on the site that is now St Luke’s church opposite the Beaufort Pub
Very interesting map thanks for posting

Swimboy64 · Sunday at 5:15 PM

I love a little map of Africa

Sid and the Sharknados · Sunday at 5:20 PM

Worried Man Blues said:
Wiki says it's gradually moving...........As of early 2019, the magnetic north pole is moving from Canada towards Siberia at a rate of approximately 55 km (34 mi) per year.[ Personally I haven't a clue!!

Oh yeah, it's definitely moving (as other's have also replied with since), it's just that's a different thing to the north magnetic pole sometimes being at the south geographic pole.

A1X · Sunday at 5:20 PM

Posted this the other day, assume it’s in the spirit of the thread, live map of all earthquakes

Seismic Monitor. A colorful, interactive map of the latest earthquakes and much more.

Up-to-date map of the latest earthquakes with resources like news, lists, tools and a 3D viewer.

www.iris.washington.edu

The Lemming Stomper · Sunday at 5:42 PM

BrightonCottager said:
View attachment 192488

I thought pegging was hanging out the washing

Giraffe · Sunday at 6:01 PM

This is Chile represented exactly across Europe.

Eeyore · Sunday at 6:20 PM

Swimboy64 said:
Looking at that it was on the site that is now St Luke’s church opposite the Beaufort Pub
Very interesting map thanks for posting

Yes, I've lived in the area most of my life. I used to pretend the back garden was a cricket pitch- and then found out it once was

Lindfield by the Pond · Sunday at 6:53 PM

happypig said:
An interactive map of submarine cables : https://www.submarinecablemap.com/

I thought they were wireless

nickbrighton · Monday at 3:13 PM

Bodian said:
You'll have missed this then. In the world of those of us who work with maps on a daily basis, it was quite an event!

Three ‘norths’ combine over GB for first time in history | OS

November 2022 saw geospatial history being made when true north, magnetic north and grid north combine at a single point in Great Britain for the first time ever.

www.ordnancesurvey.co.uk

Thanks for this, last time I had cause to navigate with OS Maps the difference was I think 8 degrees (cant recall if east or west-it was a long time ago). This current alignment would make orienteering much easier for a short while!

TWOCHOICEStom · Monday at 3:33 PM

Love this site.

Old maps of Brighton and Hove

Old maps of Brighton and Hove on OldMapsOnline.

www.oldmapsonline.org

Worried Man Blues · Monday at 3:37 PM

https://worldle.teuteuf.fr/ been doing this for a couple of years now, learned a lot!

albionalba · Monday at 3:40 PM

Giraffe said:
This is Chile represented exactly across Europe.

I thought it was a bit Chile today. Now I know why.

North of Robertsbridge · Monday at 10:57 PM

World pollution index map

https://waqi.info/

Zoom in to Delhi, India, if you want to scare yourself

Giraffe · Monday at 11:13 PM

Australian rail network. And to think I moan about the gaps in ours.

Eeyore · Monday at 11:32 PM

Giraffe said:
Australian rail network. And to think I moan about the gaps in ours.

View attachment 192590

I was at Peterborough station in 1986 for the FA Cup match. Possibly the coldest game I can remember. Almost ten years later I was at the Peterborough station above in South Australia. It was 41 degrees C

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