Force polygons and multi-polygons to follow right-hand rule?

[mradamcox]

Hello! This is a super helpful website, so thank you for making it. I have been creating some polygons with it (and pasting in externally created ones for quick visualization), and it works like a charm.

However, I noticed that if I draw a polygon in a clockwise order of points, this order is retained in the output WKT, even though the spec for WKT requires that exterior polygon coords of a polygon are ordered counter-clockwise, i.e. they must follow the right-hand rule. Likewise, a pasted in WKT that doesn't follow the right-hand rule can not be validated or corrected.

So this is just a suggestion that it would be very helpful to have something like a "force right-hand rule" checkbox that would correct any invalid coordinate order. Thank you!

[mradamcox]

Slightly different approach would be to not change any coordinates in the text box, but to apply this transformation when the user clicks Copy as > WKT, such that any "exported" WKT through that method does follow the rule.

[pieterprovoost]

As a first step I have implemented automated fixing of polygons created using the drawing tool. I'll look into a checkbox or button for validating pasted WKT.