[udig-devel] Area of a polygon?

Andrea Antonello andrea.antonello at gmail.com
Mon Aug 6 06:10:43 PDT 2007


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 at GMX.de 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
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel


More information about the udig-devel mailing list