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An introduction to creating a topographic map by drawing contour lines on an elevation field. Additional science videos and resources at: https://science.gli...
- 8 min
- 63.7K
- Mike Sammartano
Mar 20, 2016 · Learn how to draw contour lines by first plotting elevation points. Then draw smooth lines and label them. The contour lines then portray the 3 dimensional s...
- 4 min
- 232.4K
- Scott Brande
Aug 31, 2019 · If the topographic map in Figure 3.6 has a fractional scale of 1:12,000 then 1 inch is equal to 12,000 inches or 1000ft; this 1inch = 1000ft equivalency is for the horizontal scale. When we hold a ruler to the y-axis of the topographic profile in Figure 3.6, we see that 0.5 inches = 50ft, which means 1 inch = 100ft on the vertical scale.
valuable details to help you understand and use a topographic map. For example, here you will find the map scale and other important information about the map such as the year, the edition and information pertaining to the map data. Topo tip: • A legend explaining the symbols can be viewed at the side of some maps ftp2.cits.rncan.gc.ca/pub/
When the terrain is an overhang or cliff, contour lines will cross or touch. The cliffs in Látrabjarg, Iceland are up to 440 meters tall. When you generate 100-meter contours, they are very close to converging. In 3D, you can see how steep these cliffs are. So if these contours did cross, it’s very likely an overhang.
For further guidance on creating a topographic map from spot heights, please watch this step-by-step video instruction Drawing Contour Lines on a Topographic Map. Draw and label contour lines on the map at 25 m intervals between 350 m and 475 m. Calculate the scale of the map. Upload a scan of your complete map as your answer to this question.
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Studying a topo map of a familiar area is a great way to learn how to match terrain features with the contour lines on a map. Index contour lines: Every fifth contour line is a thicker, "index" line. At some point along that line, its exact elevation is listed. Contour interval: The change in elevation from one contour line to the next is ...
