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Topographic Map Contour Lines Howstuffworks


Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. They're useful because they illustrate the shape of the land surface — its topography — on the map. These maps show the land's contours, elevations, mountains, valleys, bodies of water, vegetation and more. This contour and elevation inf­ormation distinguishes them from other maps. ­The U.S. Geological Survey (USGS) produced its first topographic map in 1879, and it still produces them today. Developments in aerial photography and satellite.


These lines indicate boundaries, contours, roads, streams and more. You'll see these lines in many colors — brown, blue, red, black and purple. Each color means something different. A topographic map uses symbols to keep the map less crowded, but it's still chock-full of information. The U.S. Geological Survey (USGS) lists the following. TOPOGRAPHIC MAPS: The basics. 2. Topo tip: • Use contour lines to determine elevations of mountains and flat areas. The closer together the lines are, the steeper the slope. • Contour elevation numbers indicate the direction of elevation by always reading (pointing) uphill. What is scale? Maps are made to scale. In each case, the scale


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For USGS topographic maps, 1:24,000 is the scale most often used. Maps based on metric units use a scale of 1:25,000, where one centimeter equals 0.25 kilometers. You'll find most of the United States mapped at the 1:24,000 scale, with only a few exceptions. Puerto Rico, for example, maps at 1:20,000 or 1:30,000 because the country originally.


FAQ What are Contour Lines and Topographic Maps? Contour Lines Ever noticed those squiggly lines all over your hiking map? Other than the obvious trails and rivers, these squiggly lines are contour lines. Put simply, contour lines mark points of equal elevation on a map.


3. Read a contour map of your area. Use the Nat Geo Topo! Explorer website to find and display a contour map of your area. Point out the contour line s. Explain to students that these are imaginary lines that join points of equal elevation, and that they allow you to read the shape of the Earth's surface.


HowStuffWorks Play The World The Ultimate Reading a Topographic Map Quiz 2 min Image: JAG Images/Cultura/Getty Images About This Quiz Topographic maps show the landscape in detail. They show the land's contours, elevations, mountains, valleys, bodies of water, vegetation and more.


Constructing a topographic map by drawing in contours can be easily done if a person remembers the following rules regarding contour lines: Contour lines represent lines connecting points of equal elevation above sea level Contour lines never cross, split, or die off


A 1:250 000 scale topographic map. This is considered to be a reconnaissance-type map. It covers the same area of land as sixteen 1:50 000 scale maps. This scale is popular not only as a detailed overview of a large area, but also as a detailed road map for use when travelling on back roads and side roads.


Topographic Map Contour Lines - Topographic map contour lines indicate elevation. Learn how to read topographic map contour lines. 1. Submit Search. Search Close Search. Health. HowStuffWorks Newsletter Health Science Home & Garden Auto Tech Culture Money Lifestyle Entertainment Adventure Animals Quizzes. More . Money.


Contours are horizontal section profiles: contour lines slice topography horizontally, representing a string of points at the same elevation. Every contour line forms a closed polygon, even if its full extents are not shown within the boundary of your drawing or survey: contour lines always form closed lines, even if it is not shown within the.


Topographic maps produced by NRCan conform to the National Topographic System (NTS) of Canada. They are available in two standard scales: 1:50 000 and 1:250 000. Each map in this system has a unique number, which is a combination of numbers and letters. The area covered by a given mapsheet is determined by its location in Canada.


By using the values of two adjacent index contours, one can easily calculate the contour interval between each line. For example, there are 4 contour lines between the 5200ft and 5400ft index contours (see Figure 3.2), which means that there are 4 contour lines separating the 200ft of elevation between the index contours into 5 sections.


An introduction to creating a topographic map by drawing contour lines on an elevation field. Additional science videos and resources at: https://science.gli.


Parent page: What to Know About Contour Lines on Topographic Maps [/ivcs] Contours are imaginary outlines used for connecting locations and places with the same elevation. They make it possible to present the steepness of slopes and the tallness of mountains on a surface printed on a two-dimensional map. One of the most significant.


[ivcs] Type: article Parent page: Using Topographic Maps [/ivcs] There are various types of maps utilized for diverse purposes. For instance, while walking from say point A to Z, you can easily use a normal map. However, if you need to understand the terrain of the road, then you require having topographic maps. This is […]


a. Index Lines —Typically, every fifth contour line is thicker than the rest and features the elevation written somewhere on the line itself. The thick lines are known as index lines and can help you determine specific elevations. 2. Know Your Scale — The scaling of topographic maps is the same as the scaling of standard maps. It shows the.


By the end of this video you should be able to:1. Identify what a topographic map shows us,2. Identify contour lines on a topographic map,3. Determine the st.


Topographic maps use contour lines to show geographical features. A contour line is a line of equal elevation. If you walk along a contour line, you will not go uphill or downhill. Topographic maps are also called contour maps. The rules of topographic maps are: Each line connects all points of a specific elevation. Contour lines never cross.


[ivcs] Type: article Parent page: What to Know About Contour Lines on Topographic Maps [/ivcs] Maps are vital if you are working in unfamiliar territory. The chart illustrates the topography of the area showing locations and other features like streams, hills, and valleys. Also, topographic maps feature man-made landmarks like dams. From the charts, you […]


[ivcs] Type: section [/ivcs] In this article, you will find details that will enable you to learn about the uses of contour lines on topographic maps. For instance, single unlabeled lines show coastlines and lakeshores on the map.



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