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How to prevent duplicating values in indicator?

Question asked by jessyzyh_geoapps on Jun 20, 2018

I have a live traffic accident stream that feeds an indicator, where each report is its own entry in the attribute table of the feed.

 

Problem is one single accident is often reported multiple times and therefore has several attributes in the table with the same ID (different accidents have different ID); in the indicator I want each accident to only be counted once. 

 

I was hoping there was a filter option like "id is unique" but didn't find anything that would solve this problem. 

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