Often asked: Map Reading Guide How To Use Topographic Maps?

How do you read contour lines on a topographic map?

How To Read Contour Lines

  1. Index lines are the thickest contour lines and are usually labeled with a number at one point along the line.
  2. Intermediate lines are the thinner, more common, lines between the index lines.
  3. Supplementary lines appear as dotted lines, indicating flatter terrain.

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.

What are the symbols on a topographic map?

Topographic Map Legend and Symbols

  • Brown lines – contours (note that intervals vary)
  • Black lines – roads, railroads, trails, and boundaries.
  • Red lines – survey lines (township, range, and section lines)
  • Blue areas – streams and solid is for larger bodies of water.
  • Green areas – vegetation, typically trees or dense foliage.

How can you identify a steep area on a topographic map?

Contour lines that are relatively close together indicate a slope that is fairly steep. Contour lines that are further apart indicates a slope that is relatively flat. The area of the map above boxed in orange shows an area that has a fairly steep slope, while the area boxed in purple is a relatively flat area.

You might be interested:  Quick Answer: What To Include In A Style Guide?

What are 3 types of contour lines?

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

What 2 types of lines show elevation differences?

Contour lines are used to show elevation on a topographic map. Lines or isolines on a map that connect points with the same elevation. What does each contour line on a map show? Each contour line shows a different elevation.

What are the 5 Rules of contour lines?

Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.

What are the 5 rules of a topographic map?

What are the 5 rules of a topographic map?

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

What are the 4 rules of topographic maps?

Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.

What does the spot on a topographic map mean?

A spot elevation is a point on a map that identifies the height above mean sea level. Spot elevations tell you the actual elevation of a particular point, both existing and proposed, which can be used for planning purposes and for creating 3D models.

What are the three types of map symbols?

Map symbols are categorized into three categories: Point Symbol, Line Symbol and Area Symbol.

You might be interested:  Question: Where Can I Buy A Tv Guide?

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 ).

Leave a Reply

Your email address will not be published. Required fields are marked *