Point Features Rendering Scheme
I would like to get a clearer understanding of how best to use the Graduated Colours classification options for point features.
I have read the ArcGIS Help documentation and some other literature on it, and believe I understand the basics of Equal Interval, Quantile and Natural Breaks (though possibly not as clearly how the standard deviation classification works or how to interpret it since it doesn't seem to create divisions from mean, 1st, 2nd, 3rd standard deviation, but rather 0.5, 1.5, 2.5).
In what situations would you use one over the other for instance? E.g., Elevation point features
Mapping Center Answer:
There's not a simple answer to this question. Essentially this is what people start learning when they take a university level course in thematic cartography. Unless you're already very familiar with how basic statistics relate to your reporting units, just buying a text book is likely to produce more questions than it answers. However, the premise of your question is also flawed. Typically one would not use graduated colors on points, as graduating the symbol's size is best way to denote quantity or magnitude at a given point location.
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