I can't comment specifically about the imagecreatefromstring() function but you could try the code provided at:
http://www.bostongis.com/blog/index.php?/archives/175-Minimalist-Web-based-PHP-PostGIS-2.0-Spatial-GaeometryRaster-Viewer.html -bborie On Fri, Jun 22, 2012 at 8:06 AM, Francesco Geri <francescog...@yahoo.it> wrote: > Hello everybody. > I have some problems with st_aspng and st_asraster. I would try to generate > a raster image from a vector polygon and view this with a php script. > Following the example in the postgis documentation: > > SELECT ST_AsPNG(ST_AsRaster(ST_Buffer(ST_Point(1,5),10),150, 150, '2BUI')); > > > this generate a binary sequence (blob) but when I try to view it in a web > browser I obtain the follow error message > > Warning: imagecreatefromstring() [function.imagecreatefromstring]: Data is > not in a recognized format > > This is my script: > > header('Content-Type: image/png'); > $query_finale="SELECT ST_AsPNG(ST_AsRaster(ST_Buffer(ST_Point(1,5),10),10, > 10, '2BUI'));" > $finale_result_raster=pg_query($conn,$query_finale); > $final_result= pg_query($conn,$query_finale); > $img_raster=pg_fetch_array($final_result); > $immagine=$img_raster['immagine']; > imagepng($immagine); > > does anyone know why it doesn't work? > > Thanks!!! > > Francesco > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > -- Bborie Park Programmer Center for Vectorborne Diseases UC Davis 530-752-8380 bkp...@ucdavis.edu _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users