STUDY. Isoline map. thematic map, where interpolation is applied to points of known values to create lines of eqaul attribute values. can also be called an isarithmic map.
What data can be visualized in an Isoline map?
The isoline representation is the most used method to visualise quantitative phenomena which occur comprehensively and which values vary continuously in space. They are therefore called continua. Examples for such continua are temperature, air pressure, precipitation heights or ground elevations.
What happens to the gradient between two points on a map when the isolines are spaced close together in that area?
A steep (high) gradient changes quickly and the isolines are close together. A gentle (low) gradient changes slowly and the lines are far apart.
What is it called when contour lines are close together?
Contour lines that are relatively close together indicate a slope that is fairly steep. Contour lines that are further apart indicates a slope that is relatively flat. The area of the map above boxed in orange shows an area that has a fairly steep slope, while the area boxed in purple is a relatively flat area. Page 4.
What does a steep slope look like on a topographic map?
Closely-spaced contour lines indicate a steep slope, because the elevation changes quickly in a small area. Contour lines that seem to touch indicate a very steep rise, like a cliff or canyon wall.
What is meant by Isoline?
: a line on a map or chart along which there is a constant value (as of temperature or rainfall)
What do flow maps show?
Flow maps are a type of thematic map used in cartography to show the movement of objects between different areas. … Flow maps usually represent the movement of goods, weather phenomena, people and other living things with line symbols of different widths.
What is the difference between an Isoline and an interval?
isolines do not cross or touch (with the exception of vertical gradients, like cliffs) the interval is the numerical difference between adjacent isolines and is usually the same over the entire map. isolines pass between higher and lower values. isolines show gradients, defined as the amount of change over distance.
What do isobars that are very close together tell you?
The relationship between isobar spacing and wind speed is that the closer the isobar spacing then the stronger the wind speed. The spacing between isobars represents a pressure differential between those two isobars. When two isobars are closer together then the pressure changes at a greater rate over distance.
What is the name of the Isoline that shows elevation?
In cartography, a contour line (often just called a “contour”) joins points of equal elevation (height) above a given level, such as mean sea level.
What are the advantages of Isoline maps?
Advantages
- Shows gradual change and patterns over a large spatial area.
- Lines join places of equal values along their length.
- Uses fixed intervals so changes can be easily identified.
- Can add colour/density shading to enhance patterns/trend.
- Can be superimposed onto a base map.
What is an isopleth method map?
Isopleth maps simplify information about a region by showing areas with continuous distribution. Isopleth maps may use lines to show areas where elevation, temperature, rainfall, or some other quality is the same; values between lines can be interpolated.
What is an example of an Isoline?
A line of constant value on a map or chart. Examples include isobar (equal barometric pressure), isotherm (equal temperature), and isohyet (equal precipitation).
What is an Isoline Class 9?
Isolines are lines that are drawn to link different places that share a common value. For example, a line drawn on a map to join places that share a common temperature is known as an isotherm.
What are contour lines?
Contour lines are lines drawn on a map with equal elevation points, so elevation would be constant if you followed the contour line physically. The elevation and terrain shape of the contour lines shows. It is useful because they show the form of the land surface on the map–its topography.
Who uses an Isoline map?
Isolines are lines drawn on a map connecting data points of the same value. They are commonly used by geographers. Contour lines, for example, show relief and connect points on the map that have the same height.
How do you make an isopleth map?
Method of Construction: Isopleths are drawn on the map when point data are available. Fix the relative positions of maximum points on the map and put their values. Let us suppose that we are given the location of several points along with their temperature in °C, on an imaginary map as shown in Fig.
What is the major weakness of the Mercator projection?
Disadvantages: Mercator projection distorts the size of objects as the latitude increases from the Equator to the poles, where the scale becomes infinite. So, for example, Greenland and Antarctica appear much larger relative to land masses near the equator than they actually are.
Which side slope is the most gentle?
If you are using a topographic map, the most gentle slope will be where the lines are furthest apart.
How do you tell if a slope is steep or gentle?
When contour lines are closer to each other, the slope is steep. When contour lines are further apart from each other, the slope is gentle.
What is a gentle slope?
A gentle slope or curve is not steep or severe. gently adverb