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

EQ: How are elevation, relief and slope shown on a topographic map? A map showing the surface features of an area Provide highly accurate information on the elevation, relief and slope of the ground surface Why do we use topographic maps? EQ: How are elevation, relief and slope shown on a topographic map? G1-4

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 of 1 centimeter equals 0.24 kilometers At this scale, a map can show details of elevation and features such as rivers and coastlines. Large buildings, airports and major highways appear as outlines at the correct size Google maps G1-4

EQ: How are elevation, relief and slope shown on a topographic map? Coverage In the USA, the U.S. Geological Survey, or the USGS, produces the topographical maps for our country They have made 57,000 maps at scales of either 1:24,000 (1 inch = 2,000 ft.) or 1:25,000 The maps cover and area of 145 square kilometers EQ: How are elevation, relief and slope shown on a topographic map? G1-4

EQ: How are elevation, relief and slope shown on a topographic map? 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

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

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

Global Positioning System GPS 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

Class Work and Homework Fill In What did I learn Confused Say Reading a Topographical Map (USGS Packet) 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