[postgis-devel] [PostGIS] #810: Increare accuracy of area calculation

PostGIS trac at osgeo.org
Wed Jan 26 08:24:19 PST 2011


#810: Increare accuracy of area calculation
-------------------------+--------------------------------------------------
 Reporter:  hopfgartner  |       Owner:  pramsey      
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 1.5.3
Component:  postgis      |     Version:  1.5.X        
 Keywords:               |  
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 In the case of polygons which are "far" away from the origin, as happens
 frequently in projected SRS, the applied change may increase the accuracy
 of the area calculation by some order of magnitude. Doing some tests on
 UTM32N geometries and comparing the result with the result calculated with
 a routine written with http://de.php.net/manual/en/book.bc.php the
 accuracy improved by 4 to 5 orders of magnitude.
 The patch is against PostGIS 1.5.2.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/810>
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