WikiWirral 14yrs online 24/7 365 days a year.
Forum Stats
12455 Members
65 Forums
73757 Topics
997044 Posts
80 posts in the last 24hrs
Max Online: 7831 @ 8th Apr 2013 4:18pm
Who's Online - Click Me
78 registered (alan128, 16 invisible), 1379 Guests and 222 Spiders online.
Key: Admin, Global Mod, Mod
Social Media : Follow Us


(Views 7days)This Weeks Most Read
Games for children 1252
Submarine Disaster 590
Fitting bathroom lights need help 459
Bath Lifts 227
Murderer walks free 217
Great Mystery Of Our Time 206
Jon venables 192
Charity fishing match 152
Likely Lad Rodney Dies 149
David Cassidy 142
New General Forums
Great Mystery Of Our Time
by Spellbinder
21st Nov 2017 2:19pm
Brexit bill
by casper
20th Nov 2017 7:33pm
Telephone Caller Alert - they are NOT BT BROADBAND
by Laraine
17th Nov 2017 6:04pm
Are you a Mathematician ?
by granny
15th Nov 2017 8:59am
New Wirral History
Downloadable oldwirral pdfs
by derekdwc
9th Oct 2017 12:26pm
Forum Tips
Photo Gallery Forums
clipper yachts arriving for round the world race
Azamara,silouette and balmoral this mornig
Topic Replies
What song are you listening to?
by snowhite
Today at 02:50 PM
Jon venables
by casper
Today at 02:29 PM
Murderer walks free
by Salmon
Today at 12:29 PM
Bodytrain 2 in 1 Exercise bike and Cross trainer
by jonno40
Today at 12:17 PM
Submarine Disaster
by Gibbo
Today at 11:22 AM
Borat 😂
by _Ste_
Today at 05:08 AM
David Cassidy
by starakita
Yesterday at 05:25 PM
Wheelbarrow wanted
by zigzagwanderer
Yesterday at 02:03 PM
Lenovo H30-50 Slim Line Fast PC
by markyport
Yesterday at 12:50 PM
November
M Tu W Th F Sa Su
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30
Recent Posts : What's On ?
The Lanterns at Chester Zoo
by granny
16th Nov 2017 1:05pm
bonfire night
by snowhite
3rd Nov 2017 5:40pm
Topic Options
Rate This Topic
#829858 - 6th Oct 2013 1:41pm Finding bench marks query
derekdwc Online   content


Forum Veteran

Registered: 13th Oct 2008
Posts: 5024
Loc: Birkenhead
Bench marks are points in the real world where the latitude and longitude (and usually the elevation) are recorded to a very, very high accuracy and precision. In the real world, these are marked by small brass discs set in concrete (or bedrock) that include certain information on them. Bench marks are necessary for accurate surveying by providing well-established starting points for measures and triangulation.

bench mark database

types of bench marks

Does anyone know where this one is?
Bidston
FB Rock outcrop NW face of living rock, SE side of Hoylake Road
328560 390270
Grid ref SJ28569027


Are the bm on this map bench marks?



Attachments: Viewing Permissions May Apply. Click Me
bench marks on maps.jpg




Edited by derekdwc (6th Oct 2013 1:43pm)

Top
Google Ads
#829871 - 6th Oct 2013 3:39pm Re: Finding bench marks query [Re: derekdwc]
yoller Online   content
Smartchild

Registered: 7th Dec 2008
Posts: 479
Loc: Cheshire
Junction of Boundary Road and Bidston Village Road, according to the coordinates.


Edited by yoller (6th Oct 2013 3:43pm)

Top
#829872 - 6th Oct 2013 3:46pm Re: Finding bench marks query [Re: derekdwc]
Pinzgauer
Unregistered


The "BM" followed by the height above datum ie. "BM 27.6" are indeed bench marks Derek. Can't check the grid.ref as I don't have a decent scale map OS map of the area, but.... "living rock" ? Could it be on the sandstone rock face near a certain set of tunnels/air raid shelters on Hoylake Road? From memory, that's the only exposed "living rock" around that neck of the woods.

Top
#829922 - 6th Oct 2013 8:34pm Re: Finding bench marks query [Re: derekdwc]
Papa_Juliet Offline
Newbeee

Registered: 28th Nov 2009
Posts: 35
Loc: Great Sutton
Those co-ordinates in Google Streetview take you here:

SJ28569027

Which is Bidston Village Road near the junction of Boundary Road.
If you look along the wall to the right you can see what looks like the benchmark just above the rock where the sandstone wall starts.

Top
#829941 - 6th Oct 2013 9:43pm Re: Finding bench marks query [Re: derekdwc]
nuddy Offline
Member

Registered: 29th Dec 2009
Posts: 92
Loc: birkenhead
Fascinating, I never knew these existed,
here's one on Hilbre Island,

clicky

and another in Liverpool

clicky

Top
#830255 - 8th Oct 2013 7:42pm Re: Finding bench marks query [Re: nuddy]
OxtonHill Offline
Old Hand

Registered: 2nd Jun 2009
Posts: 311
Loc: Oxton
The Bidston Bench Mark.


Attachments: Viewing Permissions May Apply. Click Me
P1140414.JPG



Top
#830809 - 11th Oct 2013 11:49am Re: Finding bench marks query [Re: derekdwc]
derekdwc Online   content


Forum Veteran

Registered: 13th Oct 2008
Posts: 5024
Loc: Birkenhead
Wherever it had B.M on a map would there have been a real life marker (a plate, rivet etc)?
I find it more interesting now looking at maps and seeing the heights (above sealevel?)
I tend to think of most roads as on the same level unless I see a visible slope
eg
Main park entrance to the church at top of Oxton Road


Attachments: Viewing Permissions May Apply. Click Me
main park entrance.jpg

park rd s.jpg

Oxton bm.jpg



Top

Moderator:  Mark 
Random Wirral Images

Click to View Topic.
Newest Topics
Jon venables
by Dilly
07:23 AM
Borat 😂
by _Ste_
05:08 AM
Murderer walks free
by _Ste_
02:29 PM
David Cassidy
by cools
09:17 AM
Likely Lad Rodney Dies
by fish5133
21st Nov 2017 7:43pm
For Sale & Free
Bodytrain 2 in 1 Exercise bike and Cross trainer
by jonno40
12:17 PM
Wheelbarrow wanted
by zigzagwanderer
02:03 PM
Lenovo H30-50 Slim Line Fast PC
by markyport
12:50 PM
Extending dining table with six chairs
by kazaroo
20th Nov 2017 4:46pm
Water Dispenser Cold Cool Machine Cooler
by markyport
19th Nov 2017 4:45pm
Featured Member
Registered: 2nd Jul 2011
Posts: 1257
Newest Members
Ria63, Stephen1953, negusmat, wagonwheel82, Norfolk
12455 Registered Users
Today's Birthdays
No Birthdays
New Wirral Info
Fitting bathroom lights need help
by yr20405
17th Nov 2017 11:29pm
Games for children
by granny
17th Nov 2017 1:35am
Bath Lifts
by locomotive
16th Nov 2017 6:22pm
The Lanterns at Chester Zoo
by granny
16th Nov 2017 1:05pm
Travelling Bus and Train Which Tickets?
by fish5133
15th Nov 2017 5:31pm
News : New Topics
Jon venables
by Dilly
07:23 AM
Murderer walks free
by _Ste_
02:29 PM
David Cassidy
by cools
09:17 AM
Submarine Disaster
by diggingdeeper
20th Nov 2017 5:46pm
Anyone read this ?
by venice
16th Nov 2017 3:22pm
New Enthusiast Forums
Borat 😂
by _Ste_
Today at 05:08 AM
Likely Lad Rodney Dies
by fish5133
21st Nov 2017 7:43pm
Charity fishing match
by paul110180
17th Nov 2017 9:29pm
Are there any doctors or nurses on here.
by granny
16th Nov 2017 11:52pm
Taltalk Broadband Dying
by diggingdeeper
15th Nov 2017 3:40am
(Views 24hrs)Trending Newest Topics
Jon venables 192
Borat 😂 40
Wirral Sunrise Sunset
Sunrise Thu 7:53am
Sunset Thu 4:04pm
Local Time Thu 4:50pm
WikiWirral Can . . . .
Advertising Click me
To Advertise with
Wikiwirral Click Me