CGAL users discussion list

[Andreas Fabri <>]

Hello Mark,

The Poisson surface reconstruction might work here. It will reconstruct
the surface and close it so that you have to figure out where to cut off
the "soil".

andreas

On 13/08/2012 16:23, mturner wrote:
> Hello,
>
> I am seeking advice on how to use CGAL to create a 2D surface mesh in 3D space
> from a set of measured points over a region on the surface of the Earth.
>
> We have a set of a few thousand measured locations within a bounding box of
> approximately 5000 km by 2000 km.
> At this large scale the curvature of the Earth becomes important, and so we
> would like to create thin 2D mesh within 3D space.
>
> (For smaller, local regions we have used Latitude and Longitude coordinates,
> and
> the methods described in Chapter 46 2D Conforming Triangulations and Meshes)
>
> I've been reading through the CGAL online manuals,
> and from the various examples in Chapters 47, 48, 50, 57,
> it looks like all the functions are designed to work with implicit functions
> and/or medical image data.
>
> I'm trying to understand which of these methods will work with a discrete set
> of points,
> representing the case where the surface is not closed into a solid shape
> (like the examples of a full sphere, the skull, and elephant shapes),
> but rather a 'partial patch' or sub-region, of the Earth's surface.
>
> Thanks for any help or guidance you can provide,
>
> Mark Turner
> California Institute of Technology
> Division of Geological and Planetary Sciences


--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri