Latitude & Longitude
ฝัง
- เผยแพร่เมื่อ 15 ม.ค. 2015
- For an introductory college-level earth sciences class: a brief review of latitude and longitude and how to apply them locating one's self on Earth's surface.
**This video typically comes at the start of the semester For a full playlist, refer to the Oceanography or Geology playlists on the Earth Rocks! TH-cam Channel.
Content within this video is based on information available in any standard introductory college oceanography or geology textbook, such as Essentials of Oceanography -- Trujillo and Thurman -- OR Essentials of Geology -- Tarbuck and Lutgens -- Pearson Publishing.
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Thank you for this... my professor did a horrible job explaining this in their video, so I'm glad I found this (and a warm hello to my students who found their way here, haha!)
Excellent illustration, the review 7 seconds pause is very good, help ensure the learner internalised the knowledge correctly. Many thanks indeed.
I realize Im kinda randomly asking but do anybody know of a good website to watch newly released tv shows online?
Just revived school memories of our geography teacher. Nice compact video .
Really appreciated your work mam .
Yt has become a great source of learning only from like these videos.
Thanks mam ☺️😌
Thank you,I have been looking for this for weeks
Very well presented using just enough graphics to highlight but not so much that it becomes the theme. Nice to close describing the difference between nautical mile and land mile.
*Thank* *You* *so* *much*
Earth rocks and so do you! Thanks for the valuable information. I graduated a long time ago and needed a refresher. Lol
Thank you so much
Spherical coordinate system- latitude and longitude
Fantastic knowlege wowww
That was FUN , Love the thinking music too :)
great explanation
Thanks for the video....................................... & THUMBS UP :D
Excellent. Congratulations
Thanks
great ,nice explanation
You are right ✅
Thanks for this information
Superb mam
Loved it❤
This makes perfect sense compared to some. Thanks for your time😊
Is we measure lattitude from between the earth or surface
Very helpful
Thank you
Excellent
fabulous
Very well presentef❤
This is damn clear, thank you so muchhh!!! UwU
05:06 Fourth question: what if that latitude line was the Equator? Wouldn't that circle cut along the Equator go through the center of the Earth?
Yes! The equatorial latitude line runs through the center of the Earth, but the rest do not. :)
Thanks.. In that case, maybe the question needs a little bit of rephrasing so that it is 100% clear :-)
I think the best thing would be to clarify in the answer (yes to Equator only; no to rest). Will add it to the to-do list. :)
Yup!
@@IoannisKazlaris
Hi
Dear Ms Wiese, maybe I should start by saying that I was studying mathematics --- so please make allowances.
At 5:00, I would have answered "No" to the question "Are latitude lines parallel?" And I would have insisted on calling latitude circles "circles", not "lines". By "lines" we (mathematicians) understand straight lines, the shortest connections between two points, aka geodesic lines. Some confusion would be avoided if the terminology would be used correctly.
Thus, at 8:00, the statement that longitude lines (meridians) are "parallel" is not correct. They are geodesic lines and intersect at opposite points --- the criterion for being "parallel" on a sphere. (Again, circles of latitude are circles, not lines, and can be concentric and have equal distance from each other, but they should not be called "parallel".)
Perhaps this is beyond the level of what you need to teach, but the insight that heading east on some point other than the equator (latitude λ) and sailing or flying straight ahead will not advance you on a circle of latitude. You will cross latitudes towards the South (North) if you start on the northern (southeren) hemisphere; you will intersect the equator at an angle that is equal to the latitude of your starting point; you will be heading due East again at latitude -λ and then continue, crossing the equator a second time until you return to your starting point.
Yes, I've simplified the concepts here for the purposes of an introductory level earth science course. When looking at maps, latitude and longitude are referred to as lines, and whether they are parallel or not is in reference to their appearance on a flat map. But with the globe, they are most definitely circles, and all your points are valid. If I clarify to your level of detail, however, I will lose a lot of my audience. But I think I can still do better clarification on the answers the the quiz questions and incorporate some of your points. Thanks! :)
Thanks for you kind answer. -- Maps and the way they are bound to distort the globe is a can of worms one cannot avoid to open but should treat with utmost caution, always under the heading "An Approximation". (Trying to wrap a basketball without making wrinkles should convince the doubters.) -- For circles of latitude one might use the adjective "equidistant" which is mathematically correct. That these and the meridians are two different categories should be clear intuitively, without the need of digging into "geodetic lines" and all that.
Best wishes with your classes, etc!
Your understanding I think must be of great level on this topic .
Really love to see this insightful comment and after seeing this many questions had been aroused in my mind . And I would learn all these how's and why's aroused in my mind.
Thanks for your time sir
Might be a stupid question here, But someone was out on the Desert and didn't have a map of any kind what so ever, How the heck do they figure all of this out ?
Not a stupid question! Today we use the GPS in our phones and tablets to help us locate ourselves. But if you don't have that, nor a map, here's what you do.
For longitude: if you have a clock set to solar noon at a known longitude (like their home longitude), they can use the time difference between solar noon at their new desert location and their clock to determine longitude (1 hour = 15 degrees of longitude.
For latitude: if you're in the northern hemisphere and can see the north star, then you just measure the angle between the north star and the horizon, and this is your latitude. If you can't see it, then you use the angle the sun makes at high noon and compare it to a chart (that you probably don't have with you, so better get lost in the northern hemisphere!).
You can see examples and practice for this in an activity in the appendix of this workbook: fog.ccsf.edu/~kwiese/content/Classes/Oceanography1WORKBOOKFall2016.pdf
@@EarthRocks At the Naval Academy fifty years ago we had a course that covered similar questions called, "Lifeboat Navigation." One advantage that a being at sea has is that the true horizon is viewble, weather permitting.
Thanks for you nice presentation.
s/ Retired 24 Year US Navy Submariner... with a whole new set of Navigation Problems!
Which grade that normally learn this chapter in US?
Hi, Sir/Madam. I would like to ask permission, can I use this video for my students?
😂😂
thx
What happens to the length of a degree as one nears the North and South Poles?
1° of latitude doesn't really change -- same distance. But... 1° of longitude covers less and less distance.
Good explanation,
Glad it was helpful!
Good👍🙏
How do we determine the prime meridian to be where it is now. Couldn’t it be anywhere?
It could HAVE been anywhere; correct! However, it is a meaningless value if everyone gets to put it somewhere they want. So the folks that picked that name and set up that coordinate system and spread it around the world as a coordinate system for everyone to use chose where to put it. Not surprisingly, they put it through their town: Greenwich, England. Once it took hold and was used everywhere, we were stuck with that! :)
YEAAA I GOT ALL THE ANSWERS RIGHT!!!!!!!!!!!
08:02 Why latitude does not have a value of 145N? What if the point is located on the other side of the intersection point of the prime meridian and the equator?
I think you're mixing up latitude and longitude? Longitude can go up to 180° east and then west from the Prime Meridian. but latitude are east-west lines that measure how far north or south you are from the equator. The furthest north you can go is the north pole: 90°N.
❤️💯👌🏼👌🏼👌🏼
nice
[cos(θ), sin(θ)*cos(ϕ), sin(θ)*sin(ϕ)]
θ=longitude?
ϕ=latitude?
please .portugues
These videos are all made by me, unpaid, as a service to my students. I make them available through TH-cam for the benefit of others, but there's only so much I can do! I don't speak Portugese and don't have the time to translate even if I could. But I encourage those who DO speak portugese and english both to do the translations for everyone else. It takes a community to make a difference!!!
Why lattitudes are measured in degrees mam
Because planet is basically a sphere, and thus any cut is close to a perfect circle. Distances are measured accurately on circles as degrees of arc, and this is the only way to lay down a 2-dimensional grid system on a sphere.
Why don't we use concept like east pole and west pole
Because the earth is a spinning sphere, and it spins around a single axis that has two ends -- one north and the other south. There is no east and west spinning pole!
It is not correct that it is the USA that clings to Knots and Nautical Miles... it is almost universally used thru out the world for Marine Navigation and also for Air Navigation. Certainly the Royal Navy uses it as to virtually all maritime nations!
Correction appreciated! :)
Earth looks pretty rounded from space I don't see an egg
It's too small to see from space. Effectively it looks like a perfect sphere. You only notice when you measure the radius at different latitudes, and the difference is too small to see from space.