Custom linear colormaps

[delbronski]

Is there a way to provide a custom linear colormap with TiTiler.

I saw this example in the docs, which allows users to pass a linear definition.

https://developmentseed.org/titiler/examples/code/tiler_with_custom_colormap/

But I was wondering if there was a way that I could do something like this out of the box with TiTiler. I did not see any example in the docs of how something like this could be done.

For example, let's say I had data that looked like this:

"values": [
0.14231166243553162,
0.3904677703976631,
0.6386238783597946,
0.8867799863219261,
1.1349360942840576
],
"colors": [
"#2A5C84",
"#74AE56",
"#FFE733",
"#FF8C01",
"#ED2938"
]

And I wanted something like the example below where the values correspond to the relative positions of each color in a linear scale:

cmap = clr.LinearSegmentedColormap.from_list('custom', [(0.14231166243553162, '#2A5C84'), ( 0.3904677703976631, '"#74AE56").... etc], N=256)

Would I need to add my own custom dependency to achieve something like this?

Thanks!

[vincentsarago]

yeah you would need to create a custom colormap dependency https://developmentseed.org/titiler/advanced/customization/#custom-colormap

[delbronski]

Thanks! I thought so, but just wanted to make sure I was not missing something.

I don't think it should be that hard.

[vincentsarago]

I don't think it should be that hard.

I hope so, if any trouble please come back and we'll update the docs 🙏