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I have a picture in JPG which shows the world and projections of a climate variable by 2050. I need to extract the data (as if the picture was a .tif image) underpinning the view.

I tried to convert the picture from JPG to tiff format and then used the raster function in R to visualize the result, however the chart is not reproduced correctly 100%. The second step I attempted was to then convert raster values back into the original color scale of he legend to obtain real values. Has anyone a better idea? Thanks!

Francesco Solinas
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    Can you provide the image and the code you’ve tried? See [How to make a great R reproducible example](https://stackoverflow.com/q/5963269/17303805). Thanks! – zephryl Jan 13 '23 at 16:53

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