Flashcards in Stage Four Deck (25):

1

## What is stage four?

###
Present the data collected in appropriate forms

2

## What are graphical forms of data presentation?

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- line and bar

-pie chart

- circular and rose

- kite

- triangular

3

## What are statistical mapping forms?

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- chloropleth

- isoline maps

- dot maps

- proportional symbols

- flow maps

4

## Advantages of bar graphs?

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- can be used to make comparisons between two data sets

- a range of data can be shown on one graph, particularly if the bars are divided

- easy to interpret trends, patterns and anomalies

5

## Disadvantages of bar graphs?

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- width of bar can mislead over the value represented but the bar

- gaps should be left otherwise it is considered a histogram

- can only be used for discontinuous data

6

##
Advantages of line graphs?

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- useful for showing continuous data as it changes over space or time

- easy to identify trends

7

## Disadvantages of line graphs?

### - can only be used to show continuous data

8

## Advantages of pie charts?

### - clearly shows the relative contribution of each category

9

## Disadvantages of pie charts?

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- actual data values are hard to determine because the data is shown as a % of a whole

- limited number of categories can be shown otherwise the chart becomes difficult to interpret

10

##
Advantages of scatter graphs?

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- clearly shows the relationship between two variables

- shows the direction and strength of the relationship

- allows you to identify anomalies

- if x axis is distance the spatial location can be shown

11

## Disadvantages of scatter graphs?

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- can only be used to show the relationship between two variables

- number of observations is limited

- visual info can be misleading

12

## Advantages of triangle graphs?

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- provides a visual assessment of the relationship between 3 variables

- offer a method of classifying data according to each variable

- clearly shows dominant characteristic

13

## Disadvantage of triangle graphs?

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- data usually need to be converted to a %

- can only be used for 3 variables

- can be difficult to interpret

- can be difficult to construct

14

##
Advantages of kite diagram

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- clear visual representation of data

- useful for showing spatial changes

- easy to compare between different locations

15

## Disadvantage of kite diagrams

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- can be difficult to interpret

- only useful if data is converted to a %

- difficult to construct

16

##
Advantages of chloropleth mapping

I

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- mode classes easily identifies

- patterns easy to spot = location as well as value

- good way of data reduction

- simple to construct one key is made

- visually clear and easy to interpret

17

## Disadvantages of chloropleth mapping

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- choosing key classes introduces bias

- more classes = more representation hover more complicates key meaning that often the key contains fewer, large classes which misses variations

- time consuming

- hides internal distribution

- implies vales change at boundaries

- larger unit areas dominate the map

18

## Advantages of dot mapping

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- provides a great visual representation of data

- spatial distribution of data shown accurately

- data is not interrupted by boundaries (regional or international)

- possible to read of total value by counting the dots

19

##
Disadvantages of dot mapping

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- time consuming to construct

- prior knowledge of factors affecting distribution of characteristics of needed for the map to be accurate

- map can be misleading bc it implies the location of the dot is the location of the characteristic

- high density areas often result in dots merging together which makes it difficult to read off values

20

## What are isoline maps?

###
Used to show distributions that have a continuous pattern over space. Isoline are lines that join with an equal value

21

## Advantages of isoline maps?

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- clear visual rep

- distance between isolines can be used to determine gradient of change over space

- interpolation can be used to predict values for areas where there are gaps in data

22

## Disadvantages of isoline maps?

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- requires large amounts of data which is collected at specific points

- can only be used to show characteristics that change continuously over space

- using interpolation can be inaccurate as it assumes that there is a gradual change between data locations

23

## What is flowline mapping?

### Gives an impression of movement between places

24

## Advantages of flowline mapping?

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- easy to construct when data is varied without wide extremes

- easy to interpret

- provides clear visual representation of data

- non routed maps give an impression of the location of movement

- can show movement and direction on the same map

25