[postgis-devel] [PostGIS] #1005: [raster] Problem with ST_SummaryStats(text, text) results

[PostGIS]

#1005: [raster] Problem with ST_SummaryStats(text, text) results
----------------------------+-----------------------------------------------
 Reporter:  pracine         |       Owner:  pracine      
     Type:  defect          |      Status:  new          
 Priority:  medium          |   Milestone:  PostGIS 2.0.0
Component:  postgis raster  |     Version:  trunk        
 Keywords:                  |  
----------------------------+-----------------------------------------------

Comment(by dustymugs):

 The one pass standard deviation is accurate for any single tile.  I'm
 going to do some refactoring today to see if I can adapt the one pass
 standard deviation to process a coverage table though.  If I can get it
 working, we won't need flagging or anything of the sort.

 The sum was added to get the true mean instead of a weighted mean.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1005#comment:5>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.