SPI is slightly greater than Math.PI, so values that exceed the -180..180
degree range by a tiny amount don't get wrapped. This prevents points that
have drifted from their original location along the 180th meridian (due to
floating point error) from changing their sign.
SPI is slightly greater than Math.PI, so values that exceed the -180..180 degree range by a tiny amount don't get wrapped. This prevents points that have drifted from their original location along the 180th meridian (due to floating point error) from changing their sign.