Cartograms

Question 1

what is value by area mapping

Answer 1

cartogram, portrays areal units such that area is scaled proportionally to value.

Question 2

what are the two types of cartograms

Answer 2

Contiguous, and non-contiguous

Question 3

what is a contiguous cartogram

Answer 3

• adjacency of areal units maintains
• requires considerable generalization and distortions of internal boundaries
• easier for map reader to identify

Question 4

what is a Non-contiguous cartogram

Answer 4

adjacency not maintained
- areal units placed in correct relative position with gaps in between

Question 5

what are the spatial data requirements

Answer 5

data Represents discrete areal Units
- at least three other options

Question 6

what are the aspatial data requirements

Answer 6

can be raw or derived data
- better with significant variability
- few or no zero values

Question 7

when should a cartogram be used

Answer 7

when the viewer is familiar with the study area
- high shock value

Question 8

is a inset map a good idea

Answer 8

yes to improve recognition

Question 9

what map projections should be used

Answer 9

a conformal projection because shape is important