Try setting the ST_MakeEmptyRaster() upperlefty parameter to a negative value (-1).
Pierre De : postgis-users [mailto:postgis-users-boun...@lists.osgeo.org] De la part de Vitor Sapucaia Envoyé : 21 juin 2017 04:58 À : postgis-users@lists.osgeo.org Objet : [postgis-users] PostGIS ST_EuclideanDistance() not working. Wrong upperleftx and y? Hello guys! I need help on this question that I've posted on GIS stackexchange: https://gis.stackexchange.com/questions/244622/postgis-st-euclideandistance-not-working-wrong-upperleftx-and-y?noredirect=1#comment383015_244622 here is the question: I'm trying to make this ST_EuclideanDistance() function work, but no success so far. I'm not getting the expected result because the raster seems to be drawn at a wrong location. Documentation: https://trac.osgeo.org/postgis/wiki/PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools Firstly, I'm considering this test page to test the function: https://trac.osgeo.org/postgis/wiki/PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/test When running the second test case: CREATE TABLE test_source_raster_1 AS SELECT 1 AS rid, rast FROM (SELECT ST_MakeEmptyRaster(10,10,0,0,1,1,0,0,4326) AS rast ) foo; CREATE TABLE test_source_geometry_1 AS SELECT generate_series(1,10) AS id, ST_RandomPoints(the_geom,10) AS the_geom FROM (SELECT ST_SetSRID(ST_Extent(rast::geometry), 4326) AS the_geom FROM test_source_raster_1) foo; CREATE TABLE test_ref_raster_1 AS SELECT 1 AS rid, rast FROM (SELECT ST_MakeEmptyRaster(10,10,0,0,1,1,0,0,4326) AS rast ) foo; CREATE TABLE test_eudist_1_a_i_1 AS (SELECT 1 AS rid, ST_EuclideanDistance( rast,'32BF','public', 'test_source_geometry_1', 'the_geom', True ) AS rast FROM test_ref_raster_1); I'm getting this result (every raster pixel is null): [results]<https://i.stack.imgur.com/xPn7Z.png> And this is the expected result I should have gotten: [expected]<https://trac.osgeo.org/postgis/raw-attachment/wiki/PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/test/test_eudist_1_a_i_1.gif>
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