[jts-dev] split a polygon or line at the antimeridian

[John Cartwright - NOAA Federal <john.c.cartwright@xxxxxxxx>]

Hello All,

I feel like this is a common question but don't seem to find a good answer.  

I'm trying to split a simple shape at the antimeridian to form a multipart geometry.  My general approach was to construct two clipping polygons for the eastern and western hemispheres and intersect them with the target geometry.

Can someone suggest a better approach to doing this with JTS or GeoTools?

Related question - it seems that I need to shift the geometries from a -180 to 180 coordinate space to a 0 to 360 coordinate space in order to perform some of the calculations.  Is AffineTransformation the best way to approach this?  Any examples of using it for this purpose?

Thanks for any help you can provide!

--john