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Re: [udig-devel] Area of a polygon?
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I hope I use a metric projection. Where do I have to set the projection type? I never set it or change it. In another class I'm using JTS.orthodromicDistance(..) to calculate the distance between two points and this method returns a value in [m].
tony roth
Are you using a metric projection?
I've never had problems with the getArea, but I always use metric
projection systems.
Ciao
Andrea
tony.roth@xxxxxx probaly wrote:
> Hi list,
> how to get the area of a polygon?
>
> I draw a polygon roughly covering egypt and both polygon.getArea() and
> Areafunction.getArea(polygon) return something about 91.4. But what? The
> Wikipedia tells me that egypt has an area of ~1,000,000km² or 386,000 sq
> mi. Ok, my polygon is not perfect but 91,4 is neither km² nor sq mi.
>
> Where's my fault?
>
> tony roth
>
>
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