[GRASS-dev] vlib api: is area an isle?

Martin Landa landa.martin at gmail.com
Tue Mar 26 05:00:55 PDT 2013


2013/3/25 Markus Metz <markus.metz.giswork at gmail.com>:


> All areas also form isles. You probably want to skip areas that are
> part of isles which in turn are inside another area. The easiest way

I was not precise enough in my question. But you are right. That's
what I want (concretely for simple feature output defined by

> to find out if an area is part of an isle inside another area is to go
> through the area's boundaries, get for each boundary the areas on the
> left and right and check if one of them is an isle. Then use
> Vect_get_isle_area() and check if this is > 0.

Thanks, I just wondered if there is more straightforward approach.


Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa

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