MAPPING TECHNIQUES Flashcards
2 advantages of chlorapleth map
data comparisons are easy, quick and easy to read
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coloured areas easy to spot patterns and trends
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3 disadvantages of chlorapleth map
shading of countries make it difficult to distinguish
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scailing isn’t always fair e.g…..
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large areas e.g. Russia won’t show fair representation
what do chlorapleth map show
shows the density of something in this case…
what do proportional symbol map show
uses symbols and change to show data within a location, the larger the symbol the more of something there is
3 advantages for proportional symbol map
clear to see which values are higher or lower by comparing size of symbol
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can be used for both a precise geographical location and value of theme
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easy to interpret and identify patterns in the data
2 disadvantages to proportional symbol map
symbols can overlap can mean congestion and therefore difficulty interpreting values
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the size of the symbol can also mean that the precise location of the city can be lost
what are 3 advantages to a dot distribution map
can be used to show the distribution of a theme where values and location are known
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a more accurate geographical “feel” for the data
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eliminates the geographic inaccuracies (averages) which the chloropleth map presents.
what are 3 disadvantages of a dot distribution map
overcrowding of dots in areas with high concentraions can be problematic, ideally dots should not merge
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large amount of initial information before drawing map is needed
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population concentrations are shown well but can give the impression some areas have no people
what does a dot distribution map show
uses dots to show the distribution of a feature or value
what does a flow line map show
shows movement from one location to another
what are 3 advantages to a flow line map
they show movement, volume and direction of objects
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help reduce visual clutter created by having a lot of data
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data can easily be compared to draw conclusions
what are 3 disadvantages of a flow line map
the flow lines can overlap causing the map to become overcrowded and difficult to interpret
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baseman can be obscured if scales are not appropriately selected
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the real distance and direction may be distorted in order to achieve a clear image.
what are 3 advantages of land use mapping
easily compare land use in different areas of a cities
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identify how clearly how land use has changed over time
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primary data- up to date and reliable
what are 3 disadvantages of land use mapping
large areas can be time consuming if carried out individually
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some building can be hard to classify and do not fit in RICEPOTS classification
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obtaining land use maps to use as a base map can be difficult so you may have to be creative and hand draw one
what are 2 advantages of a flow line map
