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  • Graphing multiple variables in a single map using SPMAP

    Deal all,
    I am using Stata 15. I have a cross section data-set for year 2015 with crop yields for four crops that are grown in the same season. I want to make a map exhibiting the cropping pattern for all four crops. The map is supposed to look like the one in the figure below (Adapted from a recent article)
    Click image for larger version

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    I am aware of the SPMAP command and have used it previously to graph a single variable. The maps so produced show different colours (or different shades for the same colour)
    for different values of the variable.
    However I am not sure whether and how SPMAP can be adapted to generate the above graph that plots all four variables on the same graph and seems to be using "dots" for the cropping pattern not shades.
    Any suggestion would be helpful.
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