FAQ: Usgs How To Read A Topographic Map Lesson Plan?

How do you teach topographic maps?

Draw several lines, called transects, across a USGS topographic map. Create cross-sections (profiles) along these transects, using the contour lines to determine the elevation at each position along the transect.

What are the six rules for reading a topographic map?

Topographic Map Rules

  • Contour Lines Never Cross.
  • Measuring Steepness.
  • Stream Flow Direction.
  • Contours Close.
  • Concentric Circles.
  • Elevation Between Lines.

How do you describe a topographic map?

Topographic maps are a detailed record of a land area, giving geographic positions and elevations for both natural and man-made features. They show the shape of the land the mountains, valleys, and plains by means of brown contour lines (lines of equal elevation above sea level).

How do you read a hiking topographic map?

How To Read A Topographic Map While On The Trail

  1. Step 1: Orient Your Map. Using your compass and the map’s north arrow, orient your map.
  2. Step 2: Find Your Location on the Map.
  3. Step 3: Read the Contour Lines.
  4. Step 4: Identify the Landscape Features on Your Topographical Map.
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What are five topographic features on a topographic map?

Topographical Features Examples include mountains, hills, valleys, lakes, oceans, rivers, cities, dams, and roads. Elevation – The elevation, or height, of mountains and other objects is recorded as part of topography.

What features are shown on a topographic map?

Topographic maps show contours, elevation, forest cover, marsh, pipelines, power transmission lines, buildings and various types of boundary lines such as international, provincial and administrative, and many others.

What does a closed circle mean on a topographic map?

All points on a contour line have the same elevation — that is, they’re all at the same height above sea level. A series of concentric contour lines that are closed onto themselves indicate mountains or hills. Closed contour lines look like misshapen circles or loops. The smallest circle shows the peak.

What is Rule #4 when reading a topographic map?

Rule 4 – every 5th contour line is darker in color. This is an INDEX contour line. Rule 5 – Contour lines are closer together in steep terrain and farther apart in flat areas.

How do you count topographic lines?

Maps generally count five contour lines from one index line to the next, including the next index line.

  1. As with counting from one number to the next,
  2. like from five to 10,
  3. Start with the next line of the index line,
  4. Counting each contour line up to and including the next index line.

What is the space between contour lines called?

A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

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What are the colors on a topographic map?

U.S. Geological Survey (USGS) topo- graphic maps are printed using up to six colors ( black, blue, green, red, brown, and purple ).

What are the three types of lines used on a topographic map?

A. Contour lines are of three different kinds. They are the Index lines, Intermediate lines and the Supplementary lines.

What do the numbers mean on a topographic map?

Horizontal distance is found on the scale. As you look at the map, notice that the contour lines enclose smaller and smaller areas. The smallest circles represent the tops of peaks, and some are marked with x’s with numbers next to them. The numbers are the elevation at the top of the peak.

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