data presentation- non spatial data

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Geographical skills theory
Data presentation- non-spatial data
Tables- an effective an simple way to show data and are good for showing a
large amount of data in a concise way such as census material. However they
have a limited visual impact.
Diagrams- These use images to represent data. Pictograms use symbols to
represent the values of the data. These display data in a symbol and
visually stimulating way but they can be exaggerated or distorted and can
give vague displays of data.
Charts- more precise than table or diagrams and are available in a vast
variety of forms. They are forms of proportional symbols as their length,
area or volume is proportional to the value of the data. They are easily
available on computer programs and are visually stimulating.
Form Use Limitations
Bar chart Used for discrete or time Width of bar can be
series data. Simple, quick mislead over the value
and give a instant visual represented by the bar.
impression. Can be vertical Gaps should be left
or horizontal. The length of between the bars or else
the bar is proportional to the chart is known as a
its value histogram.
Pie chart Used with percentage data Too many sectors can make
to show parts of a whole set the chart look
of data. Very visually unprofessional. Hard to use
pleasing colours as they distract
from the sector size.
Difficult to label sectors
so they are easy to read.
Only useful for percentage
data. Needs calculating as 1
%= 3.6 degrees.
Divided bar chart Used to show constituents of Too many sections can make
a whole. Must keep the the chart look
divisions in the same order unprofessional. Difficult to
if you are comparing. use lots of colours not
always easy to compare.
Rose or star Used to show directions. The Time consuming to draw and
length of the bar reflects takes time to read as three
frequency and width. aspects are shown
(direction, frequency and

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Geographical skills theory
Proportional circle, The area of the circle is Time consuming to calculate
square, triangle proportional to the square and draw. Not easy to
root of the data value. Can compare accurately. Scale
cope with large numbers. complex to draw.
Proportional sphere, The area of the symbol is Time consuming to calculate
cube, pyramid proportional to the cube and draw. Not easy to
root of the data value. Copes compare accurately. Scale
with very large numbers and complex to draw.…read more


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