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Topographic Maps

Topographic Maps. EQ: How are elevation, relief and slope shown on a topographic map?. Topographic Map. Shows the surface features of an area as if you were looking DOWN on it. Provides accurate information on elevation, relief and slope. Why do we use topographic maps?.

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Topographic Maps

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  1. Topographic Maps EQ: How are elevation, relief and slope shown on a topographic map? G1-4

  2. Topographic Map • Shows the surface features of an area as if you were looking DOWN on it. • Provides accurate information on elevation, relief and slope. • Why do we use topographic maps? EQ: How are elevation, relief and slope shown on a topographic map? G1-4

  3. EQ: How are elevation, relief and slope shown on a topographic map? Scale • Large scale maps that shows a close-up view of part of Earth’s surface • Scale:1 cm= 0.24 kilometers • Shows details of elevation • Large buildings, airports and major highways appear the correct size • Google maps G1-4

  4. Coverage • The USGS,or US Geological Survey, produces the topographical maps for the US. • They have made 57,000 maps at scales of either 1:24,000 (1 inch = 2,000 ft.) • The maps cover an area of 145 square kilometers. EQ: How are elevation, relief and slope shown on a topographic map? G1-4

  5. Symbols • Mapmakers use a variety of symbols to represent buildings, churches, railroad tracks, water, etc. EQ: How are elevation, relief and slope shown on a topographic map? G1-4

  6. EQ: How are elevation, relief and slope shown on a topographic map? Showing Relief on a Topographic Map • Contour lines – represent elevation, relief, and slope. • Contour interval – change in elevation from contour line to contour line. Stays the same on a given map. http://adventure.howstuffworks.com/outdoor-activities/hiking/how-to-read-a-topographic-map2.htm G1-4

  7. Topographic maps show the shape of the land. Contour lines show elevation, slope, and relief. Closed circles represent hilltops. Contour lines show steepness of slope. Index contour lines show elevation. Contour lines never cross. SECTION OUTLINE G1-4

  8. Global Positioning SystemGPS • A network of 24 satellites that find the latitude, longitude and elevation of points on Earth’s surface. EQ: How are elevation, relief and slope shown on a topographic map? G1-4

  9. Class Work and Homework Fill In • What did I learn • Confused • Say Read pages G29 – G33, questions 1-5. Answer with complete sentences  EQ: How are elevation, relief and slope shown on a topographic map? G1-4

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