[postgis-devel] [PostGIS] #870: [raster] Optimize ST_DumpAsWKTPolygons

[PostGIS]

#870: [raster] Optimize ST_DumpAsWKTPolygons
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 Reporter:  dzwarg       |       Owner:  jorgearevalo 
     Type:  enhancement  |      Status:  assigned     
 Priority:  medium       |   Milestone:  PostGIS 2.0.0
Component:  postgis      |     Version:  trunk        
 Keywords:               |  
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Changes (by jorgearevalo):

  * owner:  dzwarg => jorgearevalo
  * status:  new => assigned


Comment:

 Actually, there's no need of double loop. The first loop's intention was
 to count the valid features (polygons with a pixel value different from
 NODATA). But applying a spatial filter forces OGR_L_GetFeatureCount to
 take that filter into account, and OGR_L_GetNextFeature to return only
 valid features. We only need one loop.

 Working on it...

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/870#comment:1>
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