 In rgb_to_PlatformColor, round the values rather than carrying out to 4 dec places because Leaflet can only deal with integers, and the differences in color with so many dec places are not noticeable.
 In rgb_to_PlatformColor, round the values rather than carrying out to 4 dec places because Leaflet can only deal with integers, and the differences in color with so many dec places are not noticeable.

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