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Adding a colormap to a Layer or FeatureGroup

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#399 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
48/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript, python

Research direction

Start with tests/test_colormap_layer.py and run the existing example to understand how colormaps are attached to GeoJson, TopoJson, and FeatureGroup layers. Done means a layer's colormap follows that layer in LayerControl, disappearing when the layer is deselected, while separate layers can retain separate colormaps.

Written by the indexing model from the issue text.

Description

enhancement

Hopefully, this is just a case of I'm-Doing-It-Wrong.

I'd like to be able to associate a colormap with a specific layer (e.g. GeoJson or TopoJson layer), independently of say, another layer of just markers or just a different choropleth layer. This way, if I deselect a layer in the LayerControl, both the GeoJson layer and the associated colormap go away (which also lets me have a separate colormap per Geo/TopoJson layer).

I've tried adding the colormap to the layer itself as well as adding both the layer and colormap to a FeatureGroup, but neither of these approaches seem to work.

Have a look at: https://github.com/eddies/folium/blob/59f88bca397a600b138abfc21591373ac3a66a78/tests/test_colormap_layer.py for an example (sorry, it's not a Jupyter notebook--long story about problems w/ Jupyter and virtualenvs)

Dominant language
Python
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Avg merge
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Merged PRs (30d)
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