[postgis-users] ST_AsPNG is problematic in Java

Ahmet Temiz ahmettemiz88 at gmail.com
Mon Jun 17 05:31:48 PDT 2013


I am dealing with java-jpa2-postgis(raster)

I tried to get an image from postgis(raster) as:

List list_rast = session.createSQLQuery("SELECT ST_AsPNG(rast) As rastpng  FROM
geoslp5 where rid=184 ;").list();

and converting object to byte[]
with usual java process
ByteArrayOutputStream bos = new ByteArrayOutputStream();
... //
bytes = bos.toByteArray ();

But resulting image file(png) is defective ?

What may the probable problems ?

Do you have any recommendations ?


Ahmet Temiz
Jeoloji Müh.
Afet ve Acil Durum Yönetimi Başkanlığı
Planlama ve Zarar Azaltma Dairesi Başkanlığı


Ahmet Temiz
Geological Eng.
Information Systems - GIS Group
Disaster and Emergency Management
of Presidency
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