Update earth radius

[DenisCarriere]

Update earth radius

Modules modified:

• @turf/buffer
• @turf/point-on-line
• @turf/distance
• @turf/helpers

Main changes comes from @turf/helpers, the rest (278 files) are simply fixture updates.

turf/packages/turf-helpers/index.js

Lines 1 to 25 in 13a8bed

	/**
	* Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
	*/
	export var earthRadius = 6371008.8;
	/**
	* Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
	*/
	export var factors = {
	meters: earthRadius,
	metres: earthRadius,
	millimeters: earthRadius * 1000,
	millimetres: earthRadius * 1000,
	centimeters: earthRadius * 100,
	centimetres: earthRadius * 100,
	kilometers: earthRadius / 1000,
	kilometres: earthRadius / 1000,
	miles: earthRadius / 1609.344,
	nauticalmiles: earthRadius / 1852,
	inches: earthRadius * 39.370,
	yards: earthRadius / 1.0936,
	feet: earthRadius * 3.28084,
	radians: 1,
	degrees: earthRadius / 111325,
	};

[Isaac-Leonard]

Does the assumption of earth being spherical and not ellipsoid have a major effect when not working near the poles?

[stebogit]

@Isaac-Leonard if the effect is "major" or significant - or not - depends on your specific use case and the dimensions of your features compared to the earth dimensions