the projection’s precision also quantizes the output coordinates #1190
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Not a fancy algorithm, just a toFixed transform before outputing the coordinates to the svg path. On a line, we remove consecutive duplicate points. The size of the test maps is shrunk by about half, which will also make them cheaper to download and share.
I didn't see a point in making a quantize precision option separated from the line sampling precision option—I don't think we would want rough lines with lots of digits, or precise lines with integer coordinates?