Navigate using contour lines

The demonstration using the ropes is a great way to explain contours. Indeed whole video is a super job. Impressive.

Have you ever been in a situation when your map had significant errors on it? How did you realize the map was wrong? How did you get back on track? And by the way, thank you for all of your great videos!

Ball direction, brilliant way to visualise it 👍

Very good video well explained

What is a contour ...an iso...?....not therm , bar or bath ....I just don't know!

I am curious to know if Southern Ireland is any different than navigating in England.
You often mention the difference in other countries.
Allow .me to Waffle
I wish I had teachers like you earlier in life,,,,,,I might have actually learned something

Extremely useful to see the ropes on the ground to visual the contour map lines. Thank you!

Im afraid you don't read the remarks by older videos because ive put down some questions by a number of them. Ill try it over here anyhow. Where i live the highest contour in the total country is that of the sidewalk😅 so there is nowhere to practice.
I want to go to Scotland next februari and i really want to practice this before going to the cold, dark, snowy, rainy, foggy but BEAUTIFUL mountains and hills overthere . Is there anything you can advise me to do to practice?

Brilliant video!!

Great video as always.
What app or software did you use to get the 3d contour maps?

Great videos 👍 much appreciated

Just found your channel and burned through 5 videos in a row. Excellent content and excellent delivery. Greatly appreciated. Keep up the great work. Quality.

Reentrance is ridiculous. It is a draw. Please use a correct terminology.😮

Great video! Can you somehow count the contour lines you are crossing and adjust your pacing estimate?

OMG! A video without any interesting informative waffle! What happened?? Still a cracking vid and thank you.

Great tks

I use them to plan our route to new areas while prospecting in the Mojave. They are quite necessary to avoid hiking up dead end canyon carrying all of our gear and having to back track. Also while canoeing in the Boundary Waters in Minnesota planning portages.
Thank you for great videos .

I have to re-watch this a few times but I am learning more from you than I ever did before. Thank you sir.

Very clearly explained Wayne. Several points new to me.
Thanks - ! 😊

Always wondered why I meet a steep hill Contour lines very important
Thanks Wayne very well explained

This is the first video that's actually explained it your mixture of talking but also showing with the 3D maps and the actual contour line Maps and help so much can't wait to go through the rest of your stuff

Thank you Wayne, another great video

Excellent explanation! 👏👏

Interesting that a single datum (at Newlyn Harbour) is used for Great Britain. How is the curvature of the Earth factored into contours and more generally altitude? The curvature across Britain will not be exactly spheroidal.

👍👍

Your comment at 6.52 re the rock face is a point I bring up in every class, sudden changes in height of the land between contour lines are not shown so don't rely totally on the contour lines to determine a safe course.

Great video. Very informative, well demonstrated and great presentation.😊

I love your videos. Your style is so engaging!

Contour lines turn your map into a 3D image.

Sir,
Thank you for this wonderful video. I found it informative and pedagogical. Did not know about the contourline-numbers being 90 degrees to the fall-line.
This was the second video about contourlines, both very good.

Could one make a request for more videos about this subject please??
I find contourlines a very important subject yet difficult to read and employ.
I don't mean a video like a circle representing hilltop, hourglass shape a saddle, hashmark inside a cirkle a depression, closer lines steeper etc.
More like reading and interpreting "on a higher level" .

Love your videos and channel. Looking forward future videos.
Best wishes.

Excellent video! When I got my “higher education” in map reading, so to speak, in the US army back in 1987 our instructors’ teaching styles were very different LOL. I had to think a bit as to what a “reentrant” was, it’s referred to as a “draw” here. And I never knew that contour numbers were put at right angles to the slope, although after looking at a couple maps it doesn’t appear to be very useful due to how far apart they are. The fall line would switchback all over the place, not make a smooth curve like yours. Maybe USGS topo maps don’t do that?

When I walked the Cape Wrath trail some people had a guidebook that said follow the contour lines at a certain height (400 meters I think it was). I wondered how do you know it's 400 meters? Do you measure somehow or just look at the land and the curves sort of tell you that you are roughly at 400 meters?

Great video, thanks. Would love to have an app that created the 3D look from the contours.
While knowing the datum used may be of interest, in the field it doesn't matter so much since the relative heights remain constant whatever the reference point.
Also give the natural features all priority over the man made. Man-made can be added or deleted. Years ago, on a nav exercise we were dropped in pairs along a road after being dumped out of the back of a covered truck. Oriented the map and wondered why the telegraph wires were on the "wrong side" of the road. Then noticed the poles looked "fresh" and further inspection showed the depressions on the other side of the road from where the older ones had been removed. Made it back in time and learned a few pairs had used the wires to orient and ended up 180 degrees wrong for some time before realising their mistake.
Match the terrain to the map, not the map to the terrain...Of course, the instructors had done this deliberately just to drive home this lesson.

The New River, when first built, roughly followed the 100 ft contour. It's neither new - over 400 years old, nor a natural river. The main source was the River Lee, just West of Hertford and was built to supply drinking water to London - it still supplies 10% of that. It has a meandering 25 mile route and falls just 14ft throughout its entire length - still a marvellous feat of engineering.

Elevation rather than altitude

Thank you very informative.

Great video

Great video as always!

Oh the irony, Newlyn is on the southwest coast, not southeast. 😂

Thanks.

Another great and informative video. Thank you.

Thanks

Good video and interesting and informative. Keep 'em coming!

Thanks for taking the time to do all these videos. Always useful to have another take on it and usually there is extra data that firms up existing knowledge 😊

fantastic video as usual, although I would suggest that Newlyn is in the south west, not south east.

Great job! I like your rope contour lines, laminated heights, ball analogy, etc. It was all compact enough to fit in a pack, light enough to carry into the field for a quick lesson, and intuitive enough with familiar items for students to easily grasp.

Ta mister. 👍

Good video thank you

I am wondering: Is the term "isopleth' also used in maps? It is used for 'lines of equal values' in Nomography.
Btw. great content, I am so happy I stumbled on your channel