topographic maps. what they show… changes in elevation of earth’s surface natural features...
TRANSCRIPT
![Page 1: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/1.jpg)
Topographic Maps
![Page 2: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/2.jpg)
What they show…
• Changes in elevation of Earth’s surface
• Natural features (mountains, lakes, etc.)
• Man made features (cities, roads, etc.)
![Page 3: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/3.jpg)
Topo Terms…• Contour lines – lines on a
map that connect points of equal elevation
• Elevation – height above sea level
![Page 4: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/4.jpg)
Topo Terms (cont’d.)…• Contour interval – difference
in elevation between 2 adjacent (side-by-side) contour lines
• Index contours – contour lines that are labeled to help you find the contour interval
![Page 5: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/5.jpg)
![Page 6: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/6.jpg)
Topo Terms (cont’d.)…• Map scale – compares
distances on the map with distances on the Earth
• Legend – explains symbols used on the map
• Benchmark – point of known elevation
![Page 7: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/7.jpg)
Rules to Remember…• Contour lines NEVER touch
or cross• Contour lines make closed
circles around hills and depressions
for example…
![Page 8: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/8.jpg)
![Page 9: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/9.jpg)
Rules to Remember…
• Hachure lines are used to show depressions
for example….
![Page 10: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/10.jpg)
![Page 11: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/11.jpg)
Rules to Remember…• Contour lines form V’s that
point to lower elevations when they cross a ridge
• Contour lines form V’s that point to higher elevations when they cross a stream
for example…
![Page 12: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/12.jpg)
![Page 13: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/13.jpg)
Reading a Topo…
• Determine the contour interval
• Determine the map scale
• Identify any hills or depressions
• Use the legend to identify man made features
![Page 14: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/14.jpg)
Topo Profile…• A cross section picture of the
land surface• Determined by graphing
contour lines• Shows changes in elevation
across a certain portion of the map
![Page 15: Topographic Maps. What they show… Changes in elevation of Earth’s surface Natural features (mountains, lakes, etc.) Man made features (cities, roads,](https://reader034.vdocument.in/reader034/viewer/2022051314/551b0c4f5503462e578b586d/html5/thumbnails/15.jpg)
Try one…