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8th grade Topographic Maps
102
Topographic Maps
- Index Contour - Darker/bold contour lines.
- Are usually shown as every fifth contour line
- Contour Lines NEVER cross.
- If the contour lines are closer, the steeper it is.
- If the contour lines are farther away, it is a gentle slope.
- Scale - ratio that compares the distance on a map to the actual distance.
(dark lines)
A "V" shaped pattern pointing downhill.
Depicts depositional pattern.
Lines that connect points of equal elevation.
Contour lines that are close together.
Scale
Darker/bold contour lines are usually shown as every 5th line.
Steep
Not steep
Lines are close together
Lines are far apart
Contour lines that are far apart.
Contour lines with decreasing elevation.
(hole, crater)
A "V" shaped pattern pointing uphill shows a river/stream. Depicts erosional patterns.
What is the relief?
What is Contour Interval?
- The elevation difference between contour lines that are next to each other.
- What the contour lines are going by.
What is Elevation?
C
B
A
EX: What is the interval between point A & B?
- Elevation - the height above sea level.
- Relief - the difference in elevation between the highest and lowest point in an area.
What is a Topographic Map?
- Topographic Map - shows the detailed shapes of Earth's surface.
- Includes mountains, rivers, lakes, valleys, & roads
steep
gentle
slope
steep
stream
- "V" shape means stream or river.
4,000 ft.
3,000 ft
2,000 ft
1,000 ft
What is a Contour Line?
- Contour Lines - lines on a topographic map that connect points of equal elevation.
- Tell you how to measure elevation and relief.
Relief:
Highest Point - Lowest Point
x 635 m