Hot answers tagged layers
Your problem is what the ArcGIS Network Analyst extension was designed for. An extensive tutorial exists which should get you started. A free training seminar is also available from ESRI: Training Seminar
I understand that you want to render a layer which has 8 fields, and each field can be categorized into 3 sub-categories. My first reaction to that would be: Are you sure? You have a maximum number of 3^8 ==6561 possible combinations of these sub categories. Much research has been done on how many colors can be distinguished by most people in a map, and ...
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