[gdal-dev] Problem exporting from postgis: no valid pixels found

[Tom van Tilburg]

Hi,

It seems since my last update of postgis (2.0.0) and gdal(1.9.1) I can't 
get exports from postgis rasters anymore.
This is what happens:

1) Uploaded my raster file with raster2pgsql

2) Check existence of raster data in postgis with:
     SELECT (ST_SummaryStats(rast,1)).* FROM tmp.ahn1_sample;
         
188011;850804.048978517;4.52528867448456;3.79287402253362;-1.10899996757507;21.1429996490479
     SELECT (ST_BandMetaData(rast,1)).* FROM  tmp.ahn1_sample;
         "32BF";-3.40282346638529e+38;f;""
     SELECT ST_Value(rast, 1000,1000) FROM tmp.ahn1_sample;
         2.8840000629425

3) Get gdalinfo:
      gdalinfo -stats "PG:host=localhost dbname='mydbase' user='me' 
password='mypass' schema='tmp' table=ahn1_sample"
==========================================================
Driver: PostGISRaster/PostGIS Raster driver
Files: none associated
Size is 1000, 1250
Coordinate System is:
PROJCS["Amersfoort / RD New",
     GEOGCS["Amersfoort",
         DATUM["Amersfoort",
             SPHEROID["Bessel 1841",6377397.155,299.1528128,
                 AUTHORITY["EPSG","7004"]],
             AUTHORITY["EPSG","6289"]],
         PRIMEM["Greenwich",0,
             AUTHORITY["EPSG","8901"]],
         UNIT["degree",0.01745329251994328,
             AUTHORITY["EPSG","9122"]],
         AUTHORITY["EPSG","4289"]],
     UNIT["metre",1,
         AUTHORITY["EPSG","9001"]],
     PROJECTION["Oblique_Stereographic"],
     PARAMETER["latitude_of_origin",52.15616055555555],
     PARAMETER["central_meridian",5.38763888888889],
     PARAMETER["scale_factor",0.9999079],
     PARAMETER["false_easting",155000],
     PARAMETER["false_northing",463000],
     AUTHORITY["EPSG","28992"],
     AXIS["X",EAST],
     AXIS["Y",NORTH]]
Origin = (140000.000000000000000,606250.000000000000000)
Pixel Size = (5.000000000000000,-5.000000000000000)
Corner Coordinates:
Upper Left  (  140000.000,  606250.000) (  5d 9'42.75"E, 53d26'36.33"N)
Lower Left  (  140000.000,  600000.000) (  5d 9'43.81"E, 53d23'14.15"N)
Upper Right (  145000.000,  606250.000) (  5d14'13.67"E, 53d26'36.76"N)
Lower Right (  145000.000,  600000.000) (  5d14'14.38"E, 53d23'14.57"N)
Center      (  142500.000,  603125.000) (  5d11'58.65"E, 53d24'55.48"N)
Band 1 Block=1000x1250 Type=Float32, ColorInterp=Undefined
ERROR 1: PG:host=localhost dbname='mydbase' user='me' password='mypass' 
schema='tmp' table=ahn1_sample, band 1: Failed to compute statistics, no 
valid pixels found in sampling.
   NoData Value=0
   Overviews: arbitrary
=================================

As you can see there seem to be no valid pixels in the raster.

Some version outputs:
     gdalinfo --version
     GDAL 1.9.1, released 2012/05/15

SELECT postgis_raster_lib_version();
     "2.0.0 r9605"

I'm curious wether anyone experiences the same. Searches on the web 
didn't really turn up with this specific error message.
I can sent the raster sample if needed.

Best regards,
  Tom