Why There are 1.5 Million Small Metal Markers Across the US
Вставка
- Опубліковано 10 чер 2021
- Start learning complex topics simple for 20% off by being one of the first 200 to sign up at Brilliant.org/HAI
Get a Half as Interesting t-shirt: standard.tv/collections/half-...
Suggest a video and get a free t-shirt if we use it: halfasinteresting.com/suggest
Follow Sam from Half as Interesting on Instagram: / sam.from.wendover
Follow Half as Interesting on Twitter: / halfinteresting
Discuss this video on Reddit: / halfasinteresting
Video written by Adam Chase
Check out my other channel: / wendoverproductions
dang i can't believe they would only put one and a half markers across the entire US, crazy
Listen here you little shhhii... just kidding I love all my fans, appreciate their input, and I'm definitely not Sam's publicist who just slipped him a sedative
Hmmmmmmmmmmm? I wonder
Sus
@@halfasinteresting hai, HAI.
@@halfasinteresting all good, we all make mistakes my dude
"Belize is somewhere...in Africa? I'm not a doctor."
- Wendover Productions, 2021
It definitly wasn't Sam from Wendover who said this because the Sam from HAI is definitly a different one.
@@someone7826 they are the same Sam Don want to say it
greytilldie operator admin Yea, I’m pretty sure s/he was being sarcastic
North America: Helo.
HAI is not that wendover guy
He's playing you all. The title mistake made you comment, which will make the algorithm suggest his video.
Good work Sam.
He just played you too
@@ardentm07 I knew what I was doing when I commented. I got half played
@@Nixplaystrombone But you did it anyways
@@Morningstar_37 true
We can compensate that by pressing the thumbs down.
A grand total of 1.5 metal markers? Impressive!
Going for the record!
I know right?!
One broken one
I think you forgot the million part. I have 1.5 of alot of things and I promise it's not impressive at all.
@@manchovie3480 no... When he uploaded the video, he didn't add the million. The OP of the comment is just poking fun at that..
Only og’s remember when the title was called “why there are 1.5 small metal markers in the us”
Yep
Yeah
You’re too early
Edit: Ok you’re alright now
Here to say i saw it
Finally i can be a part of something
Everyone's talking about how he said 1.5 instead of 1.5 million, but no-one mentioned how he got the V and A mixed up at 4:28
Someone pin this for the mistake video
I noticed that too.
I didn’t notice because I set the playback speed to 1.5x.
or how "Meades Ranch" isn't an anagram of "handcreams'
@@welshgit oh right there's one extra E
Don’t worry guys, the title is just content for their next mistake video
I guess they’ve run out of mistakes so they had to start making some intentional ones!
Task failed successfully
Ngl, "Why There are 1.5 Small Metal Markers Across the US
" makes for a whole more interesting video, and a half (as interesting).
A marker is a marker, you can't say it only a half
*BUT FIRST, WE NEED TO TALK ABOUT PARALLEL PLANETS*
@@gargravarr2 well, *"""gargravarr2"""*
Normie
Sam from Wend--HAI has found the best way to increase engagement: put a minor typo in the title
Sam just stumbled on to the new version of the community poll! Quick, tell the AI to change the algorithm!
"minor" yeah just by a factor of about 1 million
Old title:
Why there are 1.5 small metal markers across the US
Yes, i havent refreshed my screen yet
Haha thanks
that is the title again
Ah yes one and a half small metal markers; one of them must have snapped in half
I stole the second half and sold half of that to Elon Musk, who put it in his car which he then sent to space, i now own 12,5% of all the small etal markers of the US
there were two, but half of one got eaten by a beaver, making it half as interesting.
As a geographer and former surveyor, this is an excellent explanation of a pretty dense and technical subject. I will be calling NAD22 Channing Datum
Ah ok so you can explain me why we still need markers now we have GPS and Google maps. Maybe it was mentioned in the vid but the voice was too annoying so i stopped it quickly, and searched for answer in the comments.
@@effedrien Quite hard to explain this simply but I’ll try, I’m speaking for Australia but I’m assuming it’s similar in the US:
Vertical height - RTK GPS is not ideal with that. These markers are precisely leveled and mathematically adjusted in a national network.
Legal reasons - there’s a whole can of worms in Land law and cadastral system that works off these little markers. When it comes down to a screaming match between the lawyers, a bearing and distance from a marker is infinitely more trusted than a GNSS receiver epoch
@@victorthepotatoeater i see, it is like those financial departments that still cannot say goodbye to paper, after we implemented the paperless office 20 years ago. I should have known it ;) Thanks.
@@effedrien You install your specialized equipment on top of one then do you work so it can be drawn on AutoCAD with millimeter precision. GPS isnt that accurate. You need more precision when implanting complex concrete structure.
I have actually seen one of these markers and was curious what it was
Comming from Jet Lag ... Nice job Sam, keep the viewers all by yourself :)
Back in the 1980s, the National Geodetic Survey depended on volunteers to go out and locate marks. We would mark them as recovered, not found, or destroyed and send that information back to the Survey. It was a fun way to spend a Saturday. I got to go driving, hiking, and climbing in places I normally would have had no reason to visit.
Once time my girlfriend and I had driven out from Seattle and were visiting wineries in eastern Washington. As we were driving past a cemetery out in the middle of nowhere, I saw a witness post just inside the fence. I made a quick U-turn and headed into the cemetery. We located the mark the witness post was, um, witnessing, I guess, and marked it as recovered.
Geodesist here: The reason why we move from metal plates to GPS (+ a couple other astronomic things) stations is that the metal plates move with the tectonic plates, and you can't really measure that without astronomy since you have nothing really to compare it to.
There's two systems then:
- One that is used for storing measurements derived from these plates (this is the one you get when you build a new house for example). Once your house is measured to be at a certain place, it is considered to not move afterwards since on a local scale everything is moving kind of in the same direction, so you don't have to measure the new position of your home (for cartography purposes) every couple of years or so or when another house is built nearby.
- The second system is kept with these stations and is fixed in space, so that tectonic movement can be measured. Also, GPS doesn't care for tectonics, so this is what you're measuring with a GPS receiver.
The GPS coordinates of your house and the streets you drive on change with tectonic movement, but since you still want to be able to use your GPS device to find a street that may be some decades old and hasn't been remeasured since its construction, there's a new definition of the first system every couple of years; i.e. every couple of years, we calculate how to convert GPS measurements into the measurements that were used for construction so that we can keep using the old measurements and the metal plates without any major headache.
Thanks for the info!
U
One and a half small metal markers?
It's all you need one known point and a bearing :D
You're missing units in the title!
He should edit it to There are at least 1.5 small metal markers in US
I mean, there are technically 1.5 metal markers across the us
I bet his 9th grade algebra teacher is more disappointed than ever.
How can there be a unit when he’s just counting things? It’s not like is 1.5 grams compared to 1.500.000 grams of pieces of metal, it’s just 1.5 (M) pieces
Million is not a unit
Sam: "you can probably find one near your house"
People who live in the UK: "time to get swimming boys
This
In fact (putting on nerdy tone) even people in the UK can find such markers you just need to look for OSGB36 markers 😁
@@ivan01041991 Wow I didn't know that the UK has these too, I feel like going on an internet spiral of research now lol.
@@evank06 allmost every country have thouse, and even if they are no longer the main use in some countries they are still used as reference points for GNSS measurements as even thou you have a geoid model GNSS is still not perfect so you need correction data that is taken from a point like this by mounting a GNSS receiver there that then can send the error to every other GNSS receiver and for hight GNSS don't even get close compared to ground based methods :) so go look for them however DO NOT DESTROY
@@evank06 Yup, we have trig points littering our countryside. If you climb up a descent sized hills or such, half the time you'll find a square (typically) concrete pyramidal pillars with a brass fixing at the top to mount a theodolite. In theory you should be able to see at least two other trig points from each one.
Of course they're historical things now, replaced with lasers and GPSes.
"1.5 small markers" .. 1.5 million.
That's because it's only half a title!
oh so there's only one and a half markers? yeah that's actually interesting
Running when you see a land mine is actually a *fucking terrible idea.* Chances are, you'll run right onto another landmine.
You need to run back _exactly_ the way you came. Good luck, soldier!
And THAT is how Darwin Award winners are made!
It would be at least 3/4 as interesting if there were actually one and a half small metal markers throughout the United States
THEY are there. I have used them to locate myself in the desert southwest back in the 1950s
FYI- This is how they Price Flood insurance. Your Location & Elevations are based on these Datums. Just a fun fact to make this more useful :)
Oh no, we can't have useful facts around here. Only semi-interesting ones.
Actually, it can tell you much more. For example, it can tell you the elevation above the ground of the 100 year flood that’s inundating your home. All that is found on a FIRM panel (FIRM is the acronym for Flood Insurance Rate Map) and is referenced to NAVD 29 (at least it was back when I was doing this sort of thing…). Being based on NAVD29 isn’t that big of a deal, since all surveyors have the conversion to NAD88 for any given location. All of this works famously, except when the FIRM panel doesn’t delineate the flood plain where your future home will be located… then the engineer and/or hydrologist has to do all the grunt work and submit a new hydrology analysis to FEMA for inclusion in future printings of the FIRM panel. Happens all the time, which is how that data on the FIRM panel was delineated in the first place. Then, there is the problem that the original surveyor didn’t bother tying in his survey of the site to the little metal tag just down the street, instead tying his (or her) survey into a crack in the curb about a half mile further away from the site and proclaiming it as a survey marker for, say, the City of Tehachapi list of elevation, in California. However, the fly in the ointment was that there was no City of Tehachapi list of elevations. So, as it was attempted to explain to the head of the survey department that “I know where the top of the flow is, but I do NOT know the elevation of the ground is.” (He was ignorant of the predicament). The 100 year flow could be measured in inches, feet, or whatever… and the company head was too cheap to send a surveyor out 100 miles away to tie the survey into a known elevation. I never did find out what happened, but a check of the Google Earth photo of the site a couple of years ago showed no further work was done on this site… I’m guessing that it ended up being a total loss of the job.
the sheer amount of small metal markers is phenomenal. 1.5?! wow :D
its for oil reserve
As George W Bush said, “America has grown from 13 small colonies into a great and growing nation of more than 300 people”
2:37 when you need to get to the word limit on an essay
😂
“1.5 small metal markers” i hope that’s a mistake
1.5? Wow, that sure is a lot of metal markers
POV: You're here looking for comments about the typo in the title.
Alright he changed the title, it’s been a wonderful journey boys.
"HOW MUCH BIG OFF GROUND" DUDE you almost made me spit my lunch out lol 🤣🤣🤣
I love how educational this is while being sarcastically insulted. Keep it up
4:28 MISTAKE! Sam mistakenly pronounces NAVD88 as NVAD88. Waiting to see this in the annual mistakes video.
As a licensed land surveyor myself, I found this video to be very concise on the legacy, current and future datums. Excellent job!
It's always interesting hearing people talk about surveying that don't do it for work. I am going for my LSIT soon!
@@rewmeister I wish you the very best! I took the LSIT in 2003 but one thing I certainly recall, is that studying as though I were taking the PLS exam (in addition to knowing my math well!) helped me a lot, especially on the afternoon session as there were at least six questions on a very obscure Federal standard. Since I knew that one cold, it definitely helped my score.
I’ve gotta say, Sam from Wendovers Chuck-E-Cheese does look a lot nicer than the other one… it doesn’t have the creepy face on it.
Sam killed him.
I actually ended up using these markers in a geophysics class because those points also have the gravity measured at each point (because fun fact, gravity is not completely constant across the globe, it's just very similar. We used that mark and what we were measuring on a particular day at that point due to the pull of the moon's gravity and then when and measured the place nearby we were originally gonna measure. Then we calculated the difference of the gravity where we measured it, and got the approximate gravity of that point (and many other points) to show us that there was indeed a service tunnel beneath the sidewalk that we measured. I found it very cool.
Your ad placement is pro. Thanks for not interrupting the flow!
Jet lag the game. I am happy that Brian is back on Jet lag the game!
I paused the video to check out the website but it wouldn't load but when I saw the example it was like 2 miles from when I live lol
I read this as “why there are 1.5 million small metal makers in the US” as if there was 1.5 million blacksmiths 😂
“There are between 5,000 and 10,000 blacksmiths in the U.S., and of those, only about 10 percent do it professionally” NPR, 2012
We use NAVD 88 in architecture to set project datums for buildings in order to vertically locate them all the time. It’s nice to finally know the history behind it a bit. Horizontal datums are taken from (usually) the southwestern most point of the lot. Project north meanwhile is set (generally) to the lot line that most closely faces true north. Of course, if you have non-rectilinear or other atypical lots, things vary. A site surveying team will first survey the site to determine the lot lines, orientation to true north, and vertical datums (where vertical grade is in reference to NAVD 88) and provide that info to the architects in PDF and/ or CAD formats. From there we determine zoning and code restraints during the design and locate the buildings horizontal and vertical bounds, plus entrances, etc. relative to a project 0 datum (for ease of reference in drawings and construction) that is itself referenced off of the NAVD 88 0’ datum. From there, surveyors will mark out the critical points in field for contractors to begin excavation and pouring of foundations. They’ll then build up to the project 0 datum from the footings, foundations and basement slab on grade, with said datum usually being the ground floor. Makes it easy as the basement is usually 1, sometimes 2, but rarely more, vertical datum and you then have a set height to the ground floor, and so on from floor to floor that you follow.
I saw one of these markers on the AZ side of the Hoover Dam some time ago. Cool to know exactly what it is!
“If you have nothing better to do...since you made it this far into the video...”. Damn you Sam from Wendover Productions for knowing my life so well.
Only OGs remember when there were only one and a half metal makers
Thats great. Thanks. I've seen a couple of those before while checking out old fire lookouts. I figured they were part of some location system, but never figured just how so. Thanks!
These are actually really cool. I always notice them when I am out and about. I have actually found multiple ones that aren’t geodedic, they are just markers. I found one on top of the Devils Courthouse off the beaten trail.
Ah, yes. I still remember that class I had back in med school where they taught us where Belize was
0:55 *Sad Belize noises*
There must still be some ground based datums because of plate tectonics, in order for things like property boundaries to still work as their gps coordinates would slowly drift over the years.
As a kid I found one of these markers in front of my grandparents house in West Virginia. It seemed the mark never got its final serial number and complete markings. I was tickled to think my grandfather's house was a precisely unknown location. Though I may try to find it if I can find the right website. Before GPS, only a huge surveying effort could lay out the grids for accurate mapping. I traveled from West Virginia to Maine as a kid. My hat is off to those who laid out the markers. God bless em
why is the google map in portuguese at 0:24?
That's Spanish not Portuguese, but I'm also wondering the same thing
@@alyoooh There are several orthographic differences between Spanish and Portuguese that can help us differentiate the two written languages, those visible on the map include: "Cidade do México" not "Ciudad de México" / "Nova Iorque" not "Nueva York" / "Porto Rico" not "Puerto Rico" / "Pensilvânia" / "Dakota, Carolina do Norte, Sul" / "Golfo do México" / "Terra Nova e Labrador."
Aha! Meades ranch can’t be an anagram for hand creams because hand creams has one E and meades ranch has two Es!
4:55
PERRY I KNOW WHAT I'M GONNA DO TODAY
Alright who's the new HAI intern from Pittsburgh?? I'm lovin all the Pittsburgh stock footage recently!
Sam created this entire video just to say Channing Datum.
Is it 1.5 or 1.5m??
Great attention to detail here!
There’s one on the border of Texarkana. (Texas/Arkansas) Actually there’s quite a few markers of all sorts along the border in Texarkana. It was fun and used to blow my mind jumping back and forth across the markers knowing that was all it took to travel between the two states. Childhood. 😇
I can just imagine Sam sitting there in the office of the HAI conglomerates, about to call Sam from Wendover to reming him his place given his brilliant new video, and his publicist rushing in to tell him that he had made a s m a l l mistake.
Shout-out to the great town of Rimouski, QC 😆
3:01 crazy how you found stock footage of a rock that looks a bit like West Virginia
I’ve never even seen one of these but I still clicked
Also title error
HAI paints another masterpiece with his palette of stock footage, research, and voiceover 😃
i can't believe there are 1.5 small metal markers in the US alone
1.5…. That’s it? Someone forgot the units…
When a company I used to work for started developing stuff with GPS they had a reference marker in the parking lot surveyed to continental drift accuracy. Since that was nearly 30 years ago the numbers will have changed.
Most of the area had been originally surveyed under NAD27, resulting in some streets that were very close to, but not quite on very round latitudes and longitudes according to GPS. Sorta like the Prime Meridian itself.
As a surveyor, I more than appreciate you teaching people about how important these types of things are to know!
Sadly, they completely missed the purpose of what we use survey monuments/datums for.
I actually have one in my backyard it's pretty cool.
One and a half whole metal markers! Crazy!
I have seen many along the Potomac River in both VA and MD, while fishing. I turned it in to an additional hobby while fishing. Until I moved to SC
There are three of these near me that I found by chance. One is along the unpaved part of Bruner Road, north of Tartesso in Buckeye, Arizona. Another is along an unmarked trail that branches off of Hassayampa Road and leads to a cattle corral. There might be another one along this same trail, but I cannot remember where it is. Two of them were placed in 1927, and I think one was from 1938. But, all are older than my grandparents.
Great video very interesting. I saw the link from Jet Lag The Game where you & Brian filled out a geodetic datum chart! 😂
There are 6 of these I have found so far on my property and none of them are on that map.
They're probably ones that the local, county, or state government use in their GIS department. The coordinates would be more specific to your state. I work in highway construction surveying and we use markers like that called BL or BY points. surveyors will set up laser instruments on the points and then mark where different parts of the roads and bridges and such are to be built. this way all of the contractors can work of the same cad model and all match XYZ position. The DOTwill put them in the weirdest places so that hopefully they'll stay for the life of the project
Thanks I always wondered exactly what they were for I have found a few of them
Me, starting the video : *okay, what stupidly bad yet extremely funny joke will he come up with this time ?*
Sam : _C H A N N I N G D A T U M_
Me : *ah yes, perfect*
i don't get it
Why not Kicked in the NADS 22?
Comedy doesn't get better than this.
i always love the videos, love the things you talk about and i love the jokes
keep up the good work
"Why There are 1.5 Small Metal Markers Across the US"
I never knew half markers were a thing!
Only true OGs will remember when this video was called "Why There are 1.5 Small Metal Markers Across the US".
My house growing up actually had one of these in its foundation. It always made me wonder what it was for. Now I know!
Kind of fun to learn something. Very well presented. And interesting
Hello Nebula Viewers
We’ll see you next week JetLagged viewers
As someone that spent a major portion of their life in Surveying and Civil Engineering I can confirm "how much big off ground " is the official and scientific unit of measure.
Shouldn't it be how big off sea though?
My maternal great-grandfather Winship was one of the people who helped put in a lot of those markers across the us. He worked for the US Geodetic Survey organization for over 20 years before they became the Geological survey.
The new 2022 datum is going to be using gravitational measurements for a more accurate geoid model. And will also be accounting for the movement and rotation of tectonic plates. Some info I noticed wasn't in there lol.
Fun Fact: there's usually a lazy Olympics in the town of brezna, Montenegro, you can litteraly win 400 euros for being laziest the most
In other words next year when you ask the USGS for a location, they will simply tell you, “Recalculating.”
In New Zealand they also have regular markers. These are regularly surveyed to see if / how much earthquakes have moved/ twisted the country. Yes, NZ land moves on a regular basis - sometimes centimetres (inches) sometime tens of meters (yards).
Americans actually do know about meters and centimeters, especially the ones who are map nerds.
Stumbled on one of these in the top of a random butte in North Dakota. Fascinating stuff.
Hey the rest of Jetlag viewers! Ben and Adam Sweep!
I spent way too long trying to understand why one and a half small metal marker was relevant
Found four in the Joliet Regional Airport in Joliet, Illinois. Found out that i just missed one on the hangar building while there for an airshow!
They have one on the continental divide at A-basin in Colorado, didn’t know what it was till now
Man, I love little analog technology to figure out how things work. It's so fun.
MEADES RANCH - HAND CREAMS: Where is the second E?
I came for the info and I stayed for the fantastic sarcasm and wit.
Subscribed
I see these all the time when i go Jeeping, good to know there are 1.5 million of them. I have found a few from 1929 which now i know is when the original one was. If you have a remote interest in outdoors or hiking or anything like that old survey benchmarks are always fun to find.
to future generations, the og title was "Why There are 1.5 Small Metal Markers Across the US
"
F
Hey, Sam. Good job. While there may be some errors in your video, I'm sure you did your best to be as accurate and informative as you could. I appreciate you.
I found one of those on an island full of cacti . I was kayaking down a river and stopped at a little island that had one of these.
I love finding these markers when I'm hiking or touristing somewhere. They put some of them in some nice spots.
1.5 million?
Humble suggestion to fix the title; it should be "1.5M" (with the "M"), not "1.5". I love your channel! 🤩