Add optional parameter to disable truncating coordinates to @turf/intersect

[JD-Coder]

I've noticed that most turf.js transform functions return highly precise geometries, but I'm having trouble with the intersect function only returning six decimal points of precision. Consider these polygons:

var poly1 = turf.polygon([[
[0.555555555555555, 0.555555555555555],
[2.555555555555555, 0.555555555555555],
[2.555555555555555, 1.555555555555555],
[0.555555555555555, 1.555555555555555],
[0.555555555555555, 0.555555555555555]
]]);
var poly1 = turf.polygon([[
[1.555555555555555, 0.555555555555555],
[3.555555555555555, 0.555555555555555],
[3.555555555555555, 1.555555555555555],
[1.555555555555555, 1.555555555555555],
[1.555555555555555, 0.555555555555555]
]]);

turf.difference(poly1, poly2) will result in this:

[[
[1.555555555555555, 0.555555555555555],
[0.555555555555555, 0.555555555555555],
[0.555555555555555, 1.555555555555555],
[1.555555555555555, 1.555555555555555],
[1.555555555555555, 0.555555555555555]
]]

while turf.intersect(poly1, poly2) will result in this:

[[
[2.555556, 0.555556],
[1.555556, 0.555556],
[1.555556, 1.555556],
[2.555556, 1.555556],
[2.555556, 0.555556]
]]

Is there a way to get higher precision from this function?

[DenisCarriere]

@turf/intersect is currently using JSTS in the background and there was a few issues with precision errors that made certain results crash, there's definitely a way we can add an optional parameter to disable the truncating/cleaning coordinates operations.

Related Issue #463 & PR #1004

[JD-Coder]

That would be very helpful! Please let me know if you have a chance to add that parameter.

[DenisCarriere]

That would be very helpful!

👍 Indeed

Please let me know if you have a chance to add that parameter.

Unfortunately I won't have time to implement this, however feel free to push a PR with the proposed feature.

[JD-Coder]

Thanks for letting me know. I'm working on using JSTS for those transforms and it's looking promising. I appreciate for your help!

[rdfong]

Hello, has there been any progress on this? Thanks!

[rowanwins]

This now no longer happens in v6 onwards