[Gvsig_english] gvSIG 1.9::strange result when calculating area

[Benjamin Ducke]

What shape are your polygons? I remember getting bad results for
triangles once.

Ben

----- Original Message -----
From: "Wolfgang Qual" <wolfgang.qual at muenchen.de>
To: "Users and Developers mailing list" <gvsig_internacional at listserv.gva.es>
Sent: Friday, November 27, 2009 2:53:52 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna
Subject: [Gvsig_english] gvSIG 1.9::strange result when calculating area


Hi list, 
I just used the area()-Function to calculate the area of a polygon them and was surprised, as 
all values were negative. The absolute value was correct, "only" the minus is very strange. 
The layers I tested were from our official database. I am confused by this, as determinating the area using the 
measure tool results in the correct value (without "-"). Moreover, if I use the "split"-tool and recalculate the area, 
the area of the splitted geometries is positive (the rest remains negative). Very strange. 

Any ideas are appreciated very much. 
Best, 
Wolfgang 


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