Contour, Relief Feature and Profile.pptx
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Contour lines connect points of equal elevation and do not cross except at cliffs. Contour lines are numbered according to height above sea level and indicate different landforms - widely spaced lines signify flat land, circular lines mark round hills, closely spaced lines show steep slopes, bending inward lines define valleys, and irregular lines portray uneven terrain. A cross section profile diagrams height changes between two map points along a line, representing landforms like valleys, mountains, and hills depicted by contour lines.
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A topographic map is a map that uses contour lines to illustrate the surface features of a place such as its relative elevations and the shapes of its landforms. Contour lines connect points of equal elevation and the closer the lines are to each other the steeper the elevation change. A topographic map's contour interval specifies the difference in elevation between successive contour lines. Topographic maps are useful for navigation, geographic analysis and engineering design.
Topographic Maps
This document provides information about topographic maps and how to interpret contour lines and intervals. It explains that contour lines connect points of equal elevation and the contour interval is the distance between lines. It describes how to determine elevations, slope steepness, gradient, and the use of depression contours to show temporary elevation changes. The document uses examples and quizzes to help the reader learn to interpret elevation, slope, and other topographic features from contour maps.
What is Map.pptx
A map is a representation of all or part of the Earth drawn on a flat surface at a specific scale that uses symbols and colors to represent selected features of an area. Maps allow for accurate planning of journeys by showing landmarks, routes, and distances. There are different types of maps including general reference maps, thematic maps that illustrate a particular theme, and topographic maps that show landscape topography through contour lines.
What is Map.pptx
A map is a representation of all or part of the Earth's surface drawn to scale. Maps use symbols and colors to represent features like landforms, roads, and vegetation. Contour lines connect points of equal elevation, allowing maps to depict three-dimensional terrain in two dimensions. Contour maps are useful for engineering projects to evaluate sites, trace grades, and calculate earthworks.
Earth Science Mapping; interactive topographic maps
The document provides information about topographic maps, including:
- Contour lines represent elevations of equal height and contour intervals are the differences in elevation between lines.
- Topographic maps show elevation changes over an area using contour lines to indicate hills, valleys, and steepness of slopes.
- Additional features like spot elevations, contour labeling, and flow direction of rivers can help determine elevations not exactly on contour lines.
- Depression contours are used to show temporary lower elevations like small valleys or depressions that disrupt the normal downward slope of contour lines.
Mapping .pptx
This document provides information on various map reading and interpretation skills including:
1) Grid reading using eastings and northings to locate positions on a map. 2) Using four and six figure grid references to specify locations with varying precision. 3) Understanding latitude and longitude coordinates and how to read them. 4) Calculating distances, speeds, times, and areas using map scales.
CONTOURING
This document discusses contouring and contour lines. It defines a contour line as an imaginary line connecting points of equal elevation. The vertical distance between two consecutive contours is called the contour interval, which can vary depending on factors like terrain and map scale. Contouring methods are either direct, involving determining elevations of individual points, or indirect, using calculations in the field that are less accurate but faster.
Contour lines
This presentation is for Grades 6 and 7. It is based on the Edexcel Curriculum. This is a geography ppt on Contour lines. Hope this helps you to teach your classes.
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- 1. Contour, Relief Feature and Profile Karma Sonam Rigdel
- 2. What is Contour? • A contour is an imaginary line connecting places of equal height above the sea level.
- 3. Characteristics of Contour • Contour lines are numbered as per the height. • Contour lines do not merge or cross one another except in case of cliff. • Difference in height between the successive contour lines is the contour interval.
- 4. 1. Relief Features • Widely spaced contour indicates flat surface
- 5. Circular contour indicates a round hill
- 6. Closely spaced contour indicates steep slope.
- 7. Inner bending contour indicates a valley
- 8. Irregular contours indicate uneven surface landform
- 9. 3. Cross Section Profile • A diagram showing change in height along a line drawn between two points on a map. • It is drawn to represent landform depicted by contours. • Cross section is drawn across physical features like valley, mountain range and a hill.
- 10. The Procedures for drawing are: