A community for students.
Here's the question you clicked on:
 0 viewing
NY,NY
 2 years ago
Need help with drawing in the contour lines on a map. The contour interval is 5 m.
NY,NY
 2 years ago
Need help with drawing in the contour lines on a map. The contour interval is 5 m.

This Question is Closed

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0There's just a bunch of numbers and it says to draw in the contour lines.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0its super ugly i know.... :/

timo86m
 2 years ago
Best ResponseYou've already chosen the best response.0Contour interval is the actual change in elevation represented by the space between two adjacent topographic "rings". For example, if there is a contour interval of 20 feet, each topographic line on the map represents going either up or down by 20 feet of elevation (and sometimes it's hard to tell which). For convenience, many mapmakers include numbers every four or five lines to tell you what elevation is represented by that line.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0Right. So on the map it's going up by 5s. So I started at 10 and connected all the 10s. Im just not sure if I've done it right because it doesn't look like a map at all. It looks like a bunch of random pencil thingies.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1No, it's not right as you've drawn it. You need to connect all the multiples of 5, drawing between two data points as necessary (e.g., if you were drawing the contour line for 30 m, it would go between 33 and 28). It might look something like: dw:1353377851980:dw

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Not sure if this will help you visualize it: http://egsc.usgs.gov/isb/pubs/teacherspackets/mapshow/graphics/contour.gif

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0wouldn't the 40 line in your picture have it's own line right on top of it? and the outer line that you've drawn, is it connecting 25 m ?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1The 40 is on its own, so it's really a matter of technique. It could also be marked by a point, but that is hard to see. As far as I can remember, it is common to draw a small circle around the peak if it happens to be a multiple of your contour lines (in this case, 40 is a multiple of 5).

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Yes, the outer line signifies 25 m in my example.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0But i have connected all the multiples of five. I mean Im not finished, but most of the multiples ive connected them.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Right, but when a contour is closed off it indicates a peak. For example, 14 and 18 in the upperright corner. Those are not peaks. Taking a quick look at the numbers, your map should look more like this: dw:1353380276652:dw

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0so is it ok if some points dont have a circle around them?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1All they are is plotted points. Imagine you climb a mountain. You plot the elevation at every point possible. Then, when you get home, you put those elevations on a piece of paper. That's great, but it's hard to interpret. So, you decide to draw contour lines. Each line indicates (in this case) 10 m, 15 m, 20 m, etc. These contour lines give you a sense of the elevation gradient (i.e., change). Lines that are close together indicate steep hills, while lines that are far apart indicate very gradual hills.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0i cant exactly seem to conncet the lines...

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1That looks great! Looks like there's some trouble with the 40 m line below the 50 m peak, but overall you've done well.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0how do you think i can connect that line? theres a 38 mark which is less than 30 so i cant put it in the circle...

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1See the leg of the line on the left, that ends between 42 and 36?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Bend it up, above 38 and below 45. Then do the same (the numbers to the right are the same). Then, take it above 38 to connect it at the 40.

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0i dunt have space to connect the 20 line... or 15 or 10 should i just leave it unconnected? maybe the teacher will understand...

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Oh, I see what you mean. You just end them at the bottom of the map. dw:1353387355947:dw

NY,NY
 2 years ago
Best ResponseYou've already chosen the best response.0wow that took a long time...
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.