[postgis-users] ERROR: rt_raster_from_two_rasters:

[Jason Mathis]

Thanks. I will take a look when i get into the office but I am not reprojecting the rasters, I am reprojecting the vectors to match the raster projection. I was told that would be more efficient. 

> On May 30, 2014, at 2:12 AM, Hugues François <hugues.francois at irstea.fr> wrote:
> 
> Hi,
>  
> When you reproject rasters, pixels from different tiles may not have the same alignment and union is not possible. Since version 2.1 you may give a reference raster to get the right alignment (see variant 3 here http://postgis.net/docs/RT_ST_Transform.html)
>  
> Hugues.
>  
> De : postgis-users-bounces at lists.osgeo.org [mailto:postgis-users-bounces at lists.osgeo.org] De la part de Jason Mathis
> Envoyé : jeudi 29 mai 2014 20:45
> À : postgis-users at lists.osgeo.org
> Objet : [postgis-users] ERROR: rt_raster_from_two_rasters:
>  
> I loaded a bunch raster data into separate tables. One for each us western state. I thought it maybe handy to query a view instead of the individual tables. Anyways everything seemed ok but I started to get errors on a few ids I was testing. I knew what table it should be pulling from so I queried the table and no issues. So i must assume the error is because of the “union all” in the view. Can anyone confirm this and why? I am on postgres 9.2.8 and postgis 2.1.2. 
>  
> thanks,
> jason
>  
> query>>>
>  
>             SELECT
>             report_id, incident_id, 
>             ST_SummaryStats(
>             ST_UNION(
>                         ST_Clip(c.rast, 1, 
>                         ST_Transform(w.geom, 5070), true)
>             ),
>             1
>             ) as hdesc
>             FROM rasters c
>             JOIN w_reports w 
>             ON ST_Intersects(c.rast, ST_Transform(w.geom, 5070))  
>             where w.incident_id = 5443 
>             group by incident_id, report_id
>  
> error>>>
>  
>        ERROR:  rt_raster_from_two_rasters: The two rasters provided do not have the same alignment
>  
>        ********** Error **********
>  
>        ERROR: rt_raster_from_two_rasters: The two rasters provided do not have the same alignment
>        SQL state: XX000
>  
>  
>  
>  
>  
>  
>  
>  
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