I would like to plot the following per zone (30 zones total) data on a printable/non interactive map:
- Average age
- Average household income
- Number of households
- Population density
- Number of people
- Number of workers
How would you display the above 6 layers effectively on one map?
Answer
I would say you can't include all that data on one map and have it make any sense. I'd recommend you think along the lines of Tufte's principle of small multiples, having multiple smaller maps of the same area, each using a different variable. Example: http://www.juiceanalytics.com/writing/better-know-visualization-small-multiples/
Even then, you have the problem that you're using a bunch of different units, so you need a bunch of keys. Another way to view the data (but not in a map) would be to use a table with all the values, colored (ie - different colors for below average, average, above average)
Would also recommend you look at the census atlas for more map ideas: http://www.census.gov/population/www/cen2000/censusatlas/
Might help to reflect more on what message you're trying to communicate, exactly (not just what data you have).
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