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 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 are the six rules for reading a topographic map?
- 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.
How do you read contour lines on a map?
How do you read a topo map for hunting?
How do you read a topographic map for kids?
Topographical Map
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.
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.
Which Hill has the steepest slope?
How do you draw topographic lines?
What are the 5 basic colors used on a topographic map?
U.S. Geological Survey (USGS) topo- graphic maps are printed using up to six colors (
black, blue, green, red, brown, and purple
).
What are three things that Cannot be shown on a topographic map?
- Contour Lines Never Cross. …
- Measuring Steepness. …
- Stream Flow Direction. …
- Contours Close. …
- Concentric Circles. …
- Elevation Between Lines.
How do you read depression contour lines?
How do you read latitude and longitude on a topographic map?
How do you know where a mountain peak is on a topographic map?
To determine an approximate elevation at a specific point,
use the spot elevation tool query in The National Map Viewer or use the The National Map Elevation Point Query Service
.
What is spot height on a map?
A spot height is
an exact point on a map with an elevation recorded beside it that represents its height above a given datum
. In the UK this is the Ordnance Datum.
Is it better to hunt high or low pressure?
A high, stable barometer is also good hunting
. After compiling our results, whitetails seem to move best when the pressure is between 29.90 and 30.30 inches with the best movement occurring at the higher end of that range, around 30.10 to 30.30 inches.
What elevation do whitetails like?
Northwest whitetails often live
above 6,000 feet
elevation, alongside elk in most of its range, commonly sharing its habitat with mule deer.
Do deer like high or low ground?
Deer like
high ground
because it offers the best vantage point. Learn to identify the highest points in your area, and plot the best ways to approach these tricky spots.
How do you read an 8th grade topographic map?
How do you determine elevation on a topographic map?
You can figure out the elevation of any point by
finding the nearest labeled line, counting the number of lines above or below it, multiplying by the contour interval, and adding or subtracting the result from the nearest marked contour line
.
What are the symbols on a topographic map?
Topographic maps use symbols to represent natural and human constructed features found in the environment. The symbols used to represent features can be of three types:
points, lines, and polygons
. Points are used to depict features like bridges and buildings.
How do you read a contour survey?
Widely spaced contour lines indicate gentle slope. Equally spaced contour lines indicate uniform slope. Closed contour lines with higher elevation towards the centre indicate hills. Closed contour lines with reducing levels towards the centre indicate pond or other depression.
What is the name of the darker contour line?
This darker contour line is the 1400ft contour and is called the
index contour
. Index contours are spaced at regular intervals and are useful in visualy determing the contour interval.
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.
How can you tell the steepest part of a topographic map?
How do you determine the steepest slope?
The slope with highest absolute value is the steepest
. Positive slope means the function is ascending left to right, negative slope means it is descending left to right. If you only care that it is the steepest, regardless of whether it is ascending or descending, then the answer is (D).
How do you calculate slope on a topographic map?
To find the slope of a feature, the horizontal distance (run) as well as the vertical distance (rise) between two points on a line parallel to the feature need to be determined. The slope is obtained by
dividing the rise over run. Multiply this ratio by 100 to express slope as a percentage
.
