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Problems with rainbow color mapping - Input Junkie
October 6th, 2013
10:44 am

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Problems with rainbow color mapping
http://root.cern.ch/drupal/content/rainbow-color-map

The wrong colors for elevation blur out the shore line

Very short version: if you don't think about what you're trying to convey with an illustration and choose colors appropriately, then you can make the important parts hard to notice and/or create illusions about what's going on. Yellow is brighter than red or blue, and this may lead to too much emphasis of the middle of the scale if you use rainbow mapping.

Careful use of a dark brown-red-yellow color range, logarithmic scales, 3-D maps, and gray-scale mapping can help.

Point not made in the article: I think that having all the images in the same rainbow colors makes it harder to focus on any of them.

This entry was posted at http://nancylebov.dreamwidth.org/1018247.html. Comments are welcome here or there. comment count unavailable comments so far on that entry.

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From:metahacker
Date:October 6th, 2013 03:15 pm (UTC)
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Thanks for the link. This is a topic of much debate at work (unfortunately, one of the major sources of the rainbow color map in default visualizations)...
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