Limit the shape of the contour map and make it non-rectangular - 📊 Plotly Python - Plotly Community Forum

Hello, I have a contour map created of which I added a line plot on top which shows the shape of a reservoir as shown below. How can I limit the contour map to the solid black line?

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Contour plot with non-uniform points - 📊 Plotly Python - Plotly Community Forum

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Wired behavior of contour plot - 📊 Plotly Python - Plotly Community Forum

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Wired behavior of contour plot - 📊 Plotly Python - Plotly Community Forum

Contour plot cannot be sized to eliminate blank space - ROOT - ROOT Forum