Firefly Cartography

14 thoughts on “Firefly Cartography”

  1. Hi John,
    This is a great article and I’m trying it out. I’m stuck on ‘Glows are a radial gradient’. I can create a similar glow around points using layered symbology similar to the polygon glow, but is there a way to apply a radial gradient to a point layer? (in ArcGIS Pro or ArcMap 10).
    Thanks,
    Jimmy

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      1. That makes sense. I’ve never made custom markers, but I’m going to try it out.

        I found that point gradient in pro, but you’re right. You can set one end to No Color, but it shows up as grey. I’d guess Photoshop would do a better job rendering than Arc anyway.

        Thanks!

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  2. Hey John,
    I really love your work. It inspired me to do a firefly map as well. I really like your glowing dots and I’m wondering if you have a qualitative version as well as the quantitative ones you linked above?
    I am going to try to make my own but my photoshop skills are pretty weak.

    Thanks for sharing your amazing cartography with us!

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  3. Really appreciate all these resources John. I’ve reviewed everything Firefly in Living Atlas. I’ve imported the .Png points into my ArcMap style file, and they work! I see the tutorial for light saberin’ in ArcPro. Is it possible to create glow lines for hydrographic polygon/polyline features in Desktop and/or AGOL WebMaps? If the answer is obvious, feel free to volley back a RTFM.

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  4. Do you do anything to make them cluster together? I’m trying out the technique, and I’m not sure I’m getting the same clustering effect that you have.

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    1. Hmmm, not sure what you mean about clustering. Some of these examples show points that are positioned near each other. But the Firefly point style is just a glowing dot, per feature. No clustering algorithm. Just a visual effect of the glowing dots aggregating in visual intensity because they are nearby eachother. No actual computational clustering.

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