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A brief introduction to determining the exact or estimated elevation of a location on a topographic map. Additional science videos and resources at: https://...
- 8 min
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- Mike Sammartano
Topo tip: • Know what map scale you’re using to measure distance. Refer to the scale bar at the bottom of the map. How do I measure distance on a map? Use the scale bar found at the bottom of every NRCan topographic map to determine distances . between points or along lines on the map sheet. Use the secondary division on the left of the scale
Jun 27, 2024 · 2. Count the number of lines: Determine the number of contour lines above or below the nearest labeled line. Each line represents a specific change in elevation, known as the contour interval. 3. Multiply by the contour interval: Multiply the number of lines by the contour interval to calculate the total change in elevation.
The smaller the topo map scale ratio (i.e. the larger the bottom number of the ratio), the less detail the map will contain. For example, a 1:63,360 represents a larger area and therefore shows less detail than a 1:24,000 map. Orienting the map. A topographic map is oriented to true north, which is the direction of the North Pole.
If the topographic map has a scale of 1:100,000, then use a scale of 1 cm per 10 m. Align your page with the x-axis parallel to the line on the topographic map. Using a ruler, transfer the elevation points from where the contour lines intersect the line on your topographic map straight down onto your paper at the corresponding elevation lines.
Jul 19, 2011 · First, you need to know "rise" for the feature. "Rise" is the difference in elevation from the top to bottom (see the image above). So determine the elevation of the top of the hill (or slope or water table). Show me rise for the sample problem above. Next you need to know "run" for the feature.
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May 27, 2023 · 1. Use the thicker contour lines to determine the elevation. Contour lines represent paths or segments of the Earth. Topographic maps are covered in contour lines. Some contour lines are thicker, known as indexed contour lines. They have a number next to them that shows you the elevation of that path or segment. [1]
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