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symbolize a line with a gradient

October 09 2008 | 0 comments
Categories: Symbology

Is there a way to symbolize a line with a temperature gradient? I have some temperature readings along a stretch of river. I would like to be able to show the temperature of the river using a line or polygon as the river. I've tried some interpolation methods using spatial analyst, but didn't get what I wanted.

Mapping Center Answer:

First, there is no way to do what you're asking with a line symbol or even with a polygon and a gradient. The issue is how to set the directionality of the gradient, which would need to be done indpendently for every feature.  While that is technically possible using cartographic representations, setting up an angle field would not be easy and would still not work well for any feature that changed directions.

The same problem would also impact the interpolation tools in the Spatial Analyst.  

I'm not a hydrologist so I can't comment on whether water temperature can be averaged from point to point, which was another concern I had. 

So, I would leave it at suggesting you symbolize the observation points by color maybe using the temperature color ramp or the relevant portions of it.


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