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I'm aware that this is quite an old question, but as this post is one of the top search results for this topic, I thought I'd post my workflow for producing polyline heat maps in ArcGIS, as there is currently no answer for ArcGIS in this post. This technique requires the polylines to be coincident, i.e. exactly overlaying each other. If your data does not ...


As you try to cluster your points by latitude you can explicitly divide them (to subsets or just add an attribute) depending on the value of the latitude. Assuming coprdinates are in Lat and Lon columns stations['clustres'] <- NA stations$clusters [stations$Lat > n] <- 'North' stations$clusters [n > stations$Lat >= n1] <- 'Center' ...

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