# Choropleth Plot map: is there a way to apply Jenks classification?
**URL:** https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884
**Category:** Help
**Created:** [April 25, 2023, 6:08pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884 "2023-04-25T18:08:49Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@aborruso](https://talk.observablehq.com/u/aborruso)
#### Post date: [April 25, 2023, 6:08pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884/1 "2023-04-25T18:08:49Z")
Hi,
I have built [my first Observable choropleth map](https://observablehq.com/@aborruso/localizzazioni-pnrrr), and I’m really proud of it.
In the desktop software I use, QGIS, it is possible to color maps by choosing a palette and a classification method. One of these is Jenks.
There, in my OBS map, with such large ranges of values (between min and max), I’ve applied a logarithmic scale.
But the groups of similar polygons are not visible well, which I would have using a method like Jenks.
Is there to apply something similar, using `Plot.geo`?
Thank you for this great great library
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### Author:  [@Fil](https://talk.observablehq.com/u/Fil)
#### Post date: [April 25, 2023, 6:35pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884/2 "2023-04-25T18:35:29Z")
Plot doesn’t offer Jenks breaks built-in, but you can definitely add them; I’ve sent you a suggestion in [Comparing PNRR - mappa localizzazioni progetti comunali to PNRR - mappa localizzazioni progetti comunali | Observable](https://observablehq.com/compare/55527646472464fd...4edd3db05d810daf)
It builds up on the implementation by Tom McWright that I found on [https://gist.github.com/tmcw/4977508](https://gist.github.com/tmcw/4977508)—there might be a better way.
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### Author:  [@aborruso](https://talk.observablehq.com/u/aborruso)
#### Post date: [April 25, 2023, 6:55pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884/3 "2023-04-25T18:55:27Z")
> [@Fil](#):
>
> Plot doesn’t offer Jenks breaks built-in, but you can definitely add them; I’ve sent you a suggestion in [Comparing PNRR - mappa localizzazioni progetti comunali to PNRR - mappa localizzazioni progetti comunali | Observable](https://observablehq.com/compare/55527646472464fd...4edd3db05d810daf)
Wow really useful, thank you very much!
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### Author:  [@aborruso](https://talk.observablehq.com/u/aborruso)
#### Post date: [April 25, 2023, 6:59pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884/4 "2023-04-25T18:59:33Z")
> [@Fil](#):
>
> Plot doesn’t offer Jenks breaks built-in, but you can definitely add them; I’ve sent you a suggestion in [Comparing PNRR - mappa localizzazioni progetti comunali to PNRR - mappa localizzazioni progetti comunali | Observable](https://observablehq.com/compare/55527646472464fd...4edd3db05d810daf)
Is there a way to create a copy of your version, without merge it in my notebook?
I would like to keep copies of both and study a bit.
Thank you
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### Author:  [@Fil](https://talk.observablehq.com/u/Fil)
#### Post date: [April 25, 2023, 7:50pm UTC](https://talk.observablehq.com/t/choropleth-plot-map-is-there-a-way-to-apply-jenks-classification/7884/5 "2023-04-25T19:50:36Z")
There are several ways to do this. For example maybe you can merge it, fork your notebook (with the new code), then revert the changes in your original notebook?