This proportional circle map shows how much of the population is Filipina in the states surveyed in the year 2000. The legend on the right indicates what formula is used to create the size of the circle shown on the map. The legend here shows 1,500 is equal to 100%, but if the value was changed to 3,000 being equal to 100% the circles would be much smaller.
Proportional circle maps can be very deceptive as the size of the circle relates to the mathematical formula used by the map maker and not a standardized unit of measure for all maps of this type. A circle may appear to be quite large on the area it is attached only because of the equation used which affects the size of the circle and may not be a true representation of that variable's impact on that area. In other words: a large circle doesn't necessarily mean that the impact of the variable is large in relation to the area it is attached.
No comments:
Post a Comment