Because the chart is redrawn for each zoom level, the chart is always shown at the same high resolution, regardless of zoom level.
Scale
1 : 10,000,000
Scale
1 : 5,000,000
Scale
1 : 2,000,000
Scale
1 : 1,000,000
Scale
1 : 500,000
Scale
1 : 250,000
Scale
1 : 160,000
Scale
1 : 80,000
Scale
1 : 40,000
Scale
1 : 20,000
Scale
1 : 10,000
Scale
1 : 5,000
