A topographic map illustrates the topography, or the shape of the land, at the surface of the Earth. The topography is represented by contour lines, which are imaginary lines. Every point on a particular contour line is at the same elevation. These lines are generally relative to mean sea level.
What are the six rules for reading a topographic map?
Terms in this set (6)
- Rule 1: Slope. The closer the lines are, the steeper the slope.
- Rule 2: Flow and Source of a River/Stream.
- Rule 3: Mountains and Hills.
- Rule 4: Highest possible elevation of a hill/mountain.
- Rule 5: Depressions.
- Rule 6: Lowest possible elevation of a depression.
What do the lines mean on a topographic map?
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.
What are the 5 Rules of contour lines?
Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.
What is topo short for?
|TOPO||Torposten (German Military Gate Post)|
What is topo plan?
Topographical plans and maps are drawings which show the main physical features on the ground, such as buildings, fences, roads, rivers, lakes and forests, as well as the changes in elevation between land forms such as valleys and hills (called vertical relief).
What are the 5 basic colors used on a topographic map?
Red for highway classifications, built-up areas, fence lines, and U.S. Public Land Survey lines. Green for areas of woodland, scrub, orchards, and vineyards. Brown for topographic features, including contour lines. Purple for photorevised data, not field checked, consisting of a variety of added features.
What is every 5th contour line called?
To make topographic maps easier to read, every fifth contour line is an index contour. The index contour lines are the only ones labeled. The index contours are a darker or wider line in comparison to the regular contour lines. Elevations are marked on the index contour lines only.
What do contour lines on a topographic map connect?
A topographic map with contour lines connecting places that are the same height above sea level. Numbers on the lines give the height in feet. (Sea level is zero.) Lines drawn closely together indicate that a slope is steep.
What is V rule?
The V-rule is one of the most important ways of determining quickly the dip of planar features, i.e. the map pattern of a planar surface (e.g. fault or bedding) ‘V’s in the direction that it dips. This paper model shows a valley that is perpendicular to the strike of a faulted sequence and a fault.
What are 10 symbols on a topographic map?
Topographic Map Legend and Symbols
- Brown lines – contours (note that intervals vary)
- Black lines – roads, railroads, trails, and boundaries.
- Red lines – survey lines (township, range, and section lines)
- Blue areas – streams and solid is for larger bodies of water.
- Green areas – vegetation, typically trees or dense foliage.
What are 3 types of contour lines?
There are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary.
Does a topographic map show elevation?
The distinctive characteristic of a topographic map is the use of elevation contour lines to show the shape of the Earth’s surface. Elevation contours are imaginary lines connecting points having the same elevation on the surface of the land above or below a reference surface, which is usually mean sea level.
How do you read a contour map for fishing?
intervals), the space between contour lines is the key to understanding how shallow or deep you are fishing. Contour lines spaced narrowly between one another indicate areas of steep transition – meaning the depth of the water column changes from shallow to deep (or vice versa) quickly within a short distance.
What is the elevation between contour lines?
The elevation difference between two adjacent contour lines is called the contour interval (CI). Usually the contour interval is noted on the map legend. In most topographic maps every 5th contour line is drawn in bold print or wider than other contours. Such lines are called index contour lines.
What is Topo construction?
A topographic survey locates all surface features of a property, and depicts all natural features and elevations. In essence it is a 3-dimensional map of a 3-dimensional property showing all natural and man-made features and improvements. Specifically, it shows their location, size, height and any changes in elevation.
Who is a topographer?
noun. a specialist in topography. a person who describes the surface features of a place or region.
What kind of animal is a topo?
animal A mouse is a small animal with a long tail.
What are the 3 types of scales on a map?
There are three primary ways to indicate scale on a map: a representative fraction (e.g., 1:24,000), a verbal scale (e.g., “One inch to the mile”), or a graphic scale bar. Each of these can easily be added to your layout in ArcMap.
How do you read a topographic map for kids?
When a contour line is drawn on a map it represents a given elevation. Every point on the map touching the line should be the same elevation. On some maps, numbers on the lines will let you know what the elevation is for that line. Contour lines next to each other will represent different elevations.
How do you read latitude and longitude on a topographic map?
Finding Latitude and Longitude on a Topographic Map
How do you read a topographic map color?
Colors on a Topo Map
- Red: Overprinted on significant primary and secondary roads.
- Black: Manmade or cultural features.
- Blue: Water-related features.
- Brown: Contour lines and elevation numbers.
- Green: Vegetation features.
- White: Sparse or no vegetation.
- Purple: Revisions that have been made to a map using aerial photos.
What does pink mean on a topographic map?
– Brown – contour lines (elevation information) – Black – man-made/cultural features (buildings, place names, boundary lines, roads, etc.) – Red – Highways and major roads, Township/Range/Section information. – Pink – urban areas.
What does GREY represent on a topographic map?
The first features usually noticed on a topographic map are the area features, such as vegetation (green), water (blue), and densely built-up areas (gray or red).
What do V shaped contour lines represent?
The “V” shape contours indicate streams and drainage. As you can see, the “V” points uphill to a higher elevation. Generally, you can connect the apexes of the upward-pointing, “V” shaped contour lines to delineate a stream.
What is depression on a topographic map?
A closed contour, inside of which the ground or geologic structure is at a lower elevation than that outside, and distinguished on a map from other contour lines by hachures marked on the downslope or downdip side. Ref: AGI.
Why do contour lines never cross?
Contour lines never cross.
They may come very close to each other (e.g. along a cliff), but by definition they may never cross each other. * This is because one location on the surface of Earth cannot be at two different elevations!
How is a cliff shown on a topographic map?
Answer: Cliffs are represented by very close (or sometimes touching) contour lines. … Also note that if a feature such as a small cliff is shorter than the contour interval, then it may not show up on the map.
What will a hill look like on a topographic map?
Concentric circles indicate a hill. When contour lines form closed loops all together in the same area, this is a hill. The smallest loops are the higher elevations and the larger loops are downhill.
What pattern do topo lines make around hills and mountains?
What pattern do topo lines make around hills and mountains? [Hills are concentric circles or closed figures.] ʅ Click the button, Bookmarks. Select El Capitan. ? What is the pattern of topo lines for very steep areas like this cliff? [They are close parallel lines.]