[postgis-users] different results for area with different programms

[Astrid Emde]

Martin,

 I think you are right. Paul mentioned that area calculation is done by
PostGIS itself.

Astrid

On Thu, February 23, 2012 4:06 pm, Martin Davis wrote:
> The JTS area algorithm has been tweaked slightly recently, but that's
> not it - I get the same answer with JTS 1.8 (which uses the original
> algorithm).
>
> I'm guessing PostGIS doesn't use GEOS for area, right?
>
>
> Anyway, looks like it's fixed in the latest version.
>
>
> On 2/23/2012 7:25 AM, Sandro Santilli wrote:
>
>>
>> Martin, JTS area calculator changed too recently
>> (the shoelace formula). Could that explain ?
>>
>>
>> BTW, here's what I get with PostGIS 2.0.0alpha7SVN:
>> 9.33616450013379
>>
>>
>>
> _______________________________________________
> postgis-users mailing list postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users
>
>


-- 
Mit freundlichen Grüßen

Astrid Emde

********************************************
FOSSGIS Konferenz 2012
20.-22. März 2012 in Dessau
http://www.fossgis.de/konferenz/2012
********************************************
----------------------------------

 Astrid Emde
 WhereGroup GmbH & Co.KG
 Eifelstraße 7
 53119 Bonn
 Germany

 Fon: +49(0)228 90 90 38 - 19
 Fax: +49(0)228 90 90 38 - 11

 astrid.emde at wheregroup.com
 www.wheregroup.com
 Folgen Sie der WhereGroup auf twitter: http://twitter.com/WhereGroup_com

Amtsgericht Bonn, HRA 6788
-------------------------------
Komplementärin:
WhereGroup Verwaltungs GmbH
vertreten durch:
Olaf Knopp, Peter Stamm
-------------------------------
 pgp-public key:
 http://pgp.mit.edu:11371/pks/lookup?search=0x06DA52D72D515284
  Signierte und/oder verschlüsselte Nachrichten sind sehr willkommen
  Signed and/or encrypted mail is highly appreciated