Re: [jts-dev] Dimension of a MultiPoint

[Afonso Henrique Sampaio <afonsohenriquesampaio@xxxxxxxxx>]

Unlike the convex hull, the boundary can shrink towards the interior of the hull to envelop the points.  So

Boundary:                     ConvexHull:

    p1 ---------p5             p1------------p5

      \              |                |                 |

       p2          |                |                 |

     /               |                |                 |

    p3 ---------p5             p3------------p4

In the application we are developing, the edges (p1,p2) and (p2,p3) are also of interest...

Many thanks for the prompt response!
Afonso.

On Mon, Nov 23, 2020 at 9:28 PM Sandro Santilli <strk@xxxxxx> wrote:

On Mon, Nov 23, 2020 at 09:17:56PM +0100, Afonso Henrique Sampaio wrote:
> Dear,
> perhaps a silly question, but I'm new using JTS. I have a set of
> coordinates (x,y), and create a MultiPoint from a
> corresponding CoordinateSequence. Now, the dimension of this geometry I get
> by getDimension() is 0, and thus getBoundary() returns an empty Geometry.
> How then can I obtain the boundary of a set of points?

You're probably looking for Envelope, or ConvexHull

--strk;
_______________________________________________
jts-dev mailing list
jts-dev@xxxxxxxxxxx
To unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/jts-dev