Yellow roads and black numbers.

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crabbit
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Yellow roads and black numbers.

Post by crabbit »

Can someone help? When looking at OS maps there are black numbers at regular intervals alongside yellow roads. Are these altitude indicators for the roads height at that point?

Sorry if it's been covered before. I did a search but couldn't find anything?

Regards'
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NATURAL ANKLING
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Re: Yellow roads and black numbers.

Post by NATURAL ANKLING »

Hi,
There is normally a key on paper maps as to whats what?

A number not breaking a contour could be specific height at that point.

" . 453 " This is height at that point.

sure its not coincidental.
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Cyril Haearn
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Re: Yellow roads and black numbers.

Post by Cyril Haearn »

Which scale maps are you using, could you post an image?
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crabbit
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Re: Yellow roads and black numbers.

Post by crabbit »

Yeah, thanks. I had dug out a paper map to check legend and as far as I can see there's no mention of this other than spot heights at summits. However after a careful look, which is what I should have done before posting, I'm sure that these black numbers correspond with the altitude of the road at that point. :oops:

Thanks again.

Crabbit.
Richard Fairhurst
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Re: Yellow roads and black numbers.

Post by Richard Fairhurst »

crabbit wrote:Can someone help? When looking at OS maps there are black numbers at regular intervals alongside yellow roads. Are these altitude indicators for the roads height at that point?


Yes - these are "spot heights" (and indeed you'll see a little black spot on the road, if you look closely).
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crabbit
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Re: Yellow roads and black numbers.

Post by crabbit »

Richard Fairhurst wrote:
crabbit wrote:Can someone help? When looking at OS maps there are black numbers at regular intervals alongside yellow roads. Are these altitude indicators for the roads height at that point?


Yes - these are "spot heights" (and indeed you'll see a little black spot on the road, if you look closely).


Oh yes Richard, so there is lol. Thanks so much for reply.
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Mick F
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Re: Yellow roads and black numbers.

Post by Mick F »

Here's some examples.
Screen Shot 2018-03-05 at 15.02.36.png
103
113
101
142
169
216

All spot heights in metres above sea level.
Mick F. Cornwall
crabbit
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Re: Yellow roads and black numbers.

Post by crabbit »

Cheers Mick.
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NATURAL ANKLING
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Re: Yellow roads and black numbers.

Post by NATURAL ANKLING »

Hi,
Why on the road?

That's a 2018 map so there been a change for some reason?
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Mick F
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Re: Yellow roads and black numbers.

Post by Mick F »

The spot heights are on roads or pavements.
You can't stick a copper (or is it brass?) nail in a field.

There's one in the pavement here but it's not shown on the OS map.
https://www.google.co.uk/maps/@50.52415 ... 312!8i6656

Seems like I have a cycling adventure coming up.
Go and find the spot heights shown on the OS maps! :D
Mick F. Cornwall
crabbit
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Re: Yellow roads and black numbers.

Post by crabbit »

NATURAL ANKLING wrote:Hi,
Why on the road?

That's a 2018 map so there been a change for some reason?


I have a 1986 paper OS map here and it's showing black dot on road next to spot heights. So, no change. Mind you, you have to look closely.
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RickH
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Re: Yellow roads and black numbers.

Post by RickH »

From my reading of the 1:50,000 OS Legend, the only time the spot height HAS to be a summit appears to be if there is a second number in brackets where there is a trig point - the first number is ther height of the ground at the trig point & the second number is the summit height.

1-50000 heights legend.JPG
from here (PDF)
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NATURAL ANKLING
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Re: Yellow roads and black numbers.

Post by NATURAL ANKLING »

Hi,
Got a lot of old maps, and only normally use maps for hill walking only so no surprise that I expect to find them on top of hills.
With so many trig concrete posts on Dartmoor, as you would need them on top the hills, you don't need any on roads, which is why you don't see many on the Dartmoor map.

Now some one will count them :mrgreen:

P.S. after reading above, trig pillars aren't always at top of hill but most practably near top.
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NATURAL ANKLING
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Re: Yellow roads and black numbers.

Post by NATURAL ANKLING »

NATURAL ANKLING wrote:Hi,
Got a lot of old maps, and only normally use maps for hill walking only so no surprise that I expect to find them on top of hills.
With so many trig concrete posts on Dartmoor, as you would need them on top the hills, you don't need any on roads, which is why you don't see many on the Dartmoor map.

Now some one will count them :mrgreen:

P.S. after reading above, trig pillars aren't always at top of hill but most practably near top.

Pahhhhhhh...............too many to count...........who wants to know where high spots on country roads are...... :P
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RickH
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Re: Yellow roads and black numbers.

Post by RickH »

Mick F wrote:The spot heights are on roads or pavements.
You can't stick a copper (or is it brass?) nail in a field.

There's one in the pavement here but it's not shown on the OS map.
https://www.google.co.uk/maps/@50.52415 ... 312!8i6656

Seems like I have a cycling adventure coming up.
Go and find the spot heights shown on the OS maps! :D

The 1:25,000 map shows a spot height but it is in a rather cluttered bit of map so it isn't clear where the actual location is supposed to be.

Gunnislake 1-25k spot height.JPG
Gunnislake 1-25k spot height.JPG (37.57 KiB) Viewed 1609 times
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