3 Replies Latest reply on Apr 16, 2018 9:46 AM by Cathy Bridges

# Heat Maps of Line Graphs

Hi

I am currently working on a Tableau page where I have a custom made map (800x1600) where the coordinates range from -400 to 400 on the x axis and -800 to 800 on the y-axis and the centre of the map is the origin (0,0)

I have 5 objects which start close to (0,-800) and they traverse the across the map.

Each provide a line path of their journey and currently have a line map with each segregation is time in minutes.

What i would like to know if there is a way to show when a section of the map has an abundance of lines. To show it is a common path to traverse.

The path is a line between two points in time, I want to know how to collect paths and show a common route.

Thanks

Richard

(PS, example in the image, the middle should be red where as the other two would be blue/green)

• ###### 1. Re: Heat Maps of Line Graphs

How about a calculation that shows the % difference from average and then using that field on color?

Like (AVG(Whatever)-SUM([Whatever]))/AVG(Whatever)

• ###### 2. Re: Heat Maps of Line Graphs

It is a neat idea, but in my case i am using co-ordinates x and y.

I could use a polygon region system which will count number of positions in an area, but if the map image underlay changes, then i need to recreate the polygons.

• ###### 3. Re: Heat Maps of Line Graphs

Hmm... I don't deal with maps enough to know for sure, but it seems to me there must be a way. Hopefully someone else can jump in and answer.