| Graduated Color Maps |
Used when data values
are
numeric and relate to geographic areas, e.g. state, local government |
Data is divided into distinct
ranges. Each
data range is represented by a color or pattern |
Number of cases per state,
local government |
| Dot Density |
Used when data values
are
numeric and relate to geographic areas, e.g. state, local government |
Data is represented by
randomly distributed points in an area. Each
dot represents a user definable
value |
Density of population per
administrative level, with each dot representing 500 people |
| Value Map |
Used when data values
are
Boolean (1 or 0, True/False), or unique names and relate to geographic areas |
A different color is used
to symbolize a different value for each
geographic area |
Red = endemic
Blue = not endemic |
| Single
Symbol Map |
Used when data values
are
unique and relate to geographic points that
are mapped |
When all features in a
layer are drawn with the same symbol |
Health care center as a
cross, a case as a red dot |
| Graduated Symbol Map |
Used when data values
are
numeric and relate
to geographic points |
Data is divided into distinct
ranges. Each
data range is represented proportionally in size by a point |
Number of inhabitants per
village/Number of cases per facility |
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