Symbology question

07-23-2016 03:31 AM
New Contributor

I'm very new to ArcGIS and would very much appreciate some help with this software. I'm creating a district map based on the prevalence of disease x. I cannot seem to get this right- the prevalence ranges from 80 to 100, and would like there to be 5 classes (80 to 82, 82.1 to 86, 86.1 to 91, 91.1 to 95, and 95.1 to 100). But when I select the Field as District, and Normalization as Prevalence, the gradient fill of each district does not correspond to the prevalence. For some reason I cannot upload the screenshot of what I'm dealing with.

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2 Replies
MVP Emeritus

use a manual classification, currently it is using the Natural Breaks classification scheme which attempts to place an equal distribution into each of the number of categories you specify

MVP Emeritus

It doesn't get more straightforward than this Using graduated colors—Help | ArcGIS for Desktop

specify a manual classification

and fill in the lower and upper values for the range

color patches come second