1. Dot Density Maps
1.1. represented by SEVERAL DOTS
1.1.1. distributed randomly in an area (Polygon)
1.2. encodes
1.2.1. variable values by means of density of plots
1.3. preprocessing
1.3.1. compute the dot UNIT, a constant value for each dot.
1.3.2. random location of dots
1.3.3. set CRS to an EqualArea projection
2. Proportional Symbols Maps
2.1. represented by ONE SYMBOL (circle)
2.1.1. located generally in the center of polygon (centroid)
2.2. encodes
2.2.1. variable values by means of size of symbol
2.3. preprocessing
2.3.1. computing location for the symbol (centroid?)
2.3.2. set CRS to an EqualArea projection
3. Choropleth Maps
3.1. represented by COLOR maps
3.2. encodes
3.2.1. variable values by a shade of color map
3.3. preprocessing
3.3.1. normalization
3.3.1.1. density
3.3.1.1.1. non-normalized
3.3.1.1.2. normalized
3.3.1.2. proportion
3.3.1.2.1. non-normalized
3.3.1.2.2. normalized
3.3.1.3. average
3.3.1.3.1. non-normalized
3.3.1.3.2. normalized
3.3.1.4. change
3.3.1.4.1. non-normalized
3.3.1.4.2. normalized
3.3.2. discretization
3.3.2.1. cut the variable
3.3.2.1.1. show intervals
3.3.2.1.2. show levels
3.3.3. set CRS to an EqualArea projection