python - How do I draw a colourbar for basemap etopo? -

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basemap has etopo method draws etopo1 global relief image, suitable use background. uses blue tones bathymetry, greens , browns dry land areas, , white ice caps. poster produced noaa (290 mib pdf) includes colourbar illustrating those. there builtin or otherwise simple way include colourbar within basemap?

low-resolution sample same image source
low-resolution sample obtained noaa


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