What shape are your polygons? I remember getting bad results for triangles once.
Ben ----- Original Message ----- From: "Wolfgang Qual" <[email protected]> To: "Users and Developers mailing list" <[email protected]> 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 -- Wolfgang Qual Referat für Gesundheit und Umwelt Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [email protected] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm _______________________________________________ Gvsig_internacional mailing list [email protected] http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional ------ Files attached to this email may be in ISO 26300 format (OASIS Open Document Format). If you have difficulty opening them, please visit http://iso26300.info for more information.
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