some questions you might ask yourself before deciding on the choropleth route.
1) is the phenomena evenly distributed throughout the enumeration area? i f the density of the phenomenon is more not less uniform then a choropleth map is appropriate
2)does the phenomenon change at enumeration unit boundaries? if so, then choropleth is appropriate.
3) is there a significant variation in size and shape of the enumeration units? If so, choropleth map may not be advised
When you select data to include on a choropleth map you must be sure to adjust the raw totals. do the raw totals involve area?
you might consider mapping rates
All standardization undertakings have their own computational methods.
even though all computational techniques involve ratios, ratios, by themselves are usually not enough
of course, each standardization approach would lead to a different map
if you map raw totals , use proportional symbols
The answers to these and other questions about designing and constructing the map will help determine how accurate your map is using a choropleth technique
h
