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17 Cards in this Set
- Front
- Back
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Topographic/Contour map
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Map that shows and elevation field, meaning how high and low the ground is in relation to sea level.
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Contour Lines
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Lines that connect points that are of the same elevation. They show the exact elevation, the shape of the land, and the steepness of the land’s slope. They never touch or cross.
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Benchmark
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A point where exact elevation is known and is marked with a BM on USGS topographic maps.
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Map Scale
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Compares distances on the map with distances on earth.
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Legend
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Explains symbols used on the map.
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Index Contours
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Contour lines that are labeled to help you find the contour interval.
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Contour Interval
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The difference in elevation between two contour lines that are side by side. (not the distance between the two lines – to get the distance you need to use the map scale)
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Steep Slope
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Contour feature indicated by lines that close together.
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Gentle Slope
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Contour feature indicated by lines that are far apart.
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Dark Contour Line
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Every fifth contour line.
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Hachure Lines
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Regular contour lines with small segments sticking out from it.
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Depression
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Indicated by hachure lines inside a closed contour line.
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Blue Lines/Shapes
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Represent water features, such as streams and lakes. Streams are Contour lines form V’s that point upstream when they cross a stream. It is important to remember that they point in the opposite direction as the flow of water.
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Brown Lines
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Represent regular contour lines.
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Black Lines
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Represent roads, buildings, railroads, other man made objects.
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Green
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Represents woodland areas.
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Red Lines
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Represent highways.
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