I am sorry, I did not make myself clear. It always returns 0. There is a way to set the spatial reference. Typically with the srsName attribute on the geometry. In this example that would be the gml:Polygon element. However, none of the valid values is recognized by JTS. It is as if the srsName attribute is not getting to JTS.

On Mon, Nov 13, 2017 at 5:41 PM, Christian Grün <christian.gruen@gmail.com> wrote:

> I can’t get the geo:srid() to work. I have tried many combinations of @srsName values. Can anyone provide examples?

Try e.g. this:

import module namespace geo='http://expath.org/ns/geo';
declare namespace gml='http://www.opengis.net/gml';
geo:srid(
<gml:Polygon>
<outerboundaryIs>
<gml:LinearRing>
<coordinates>-150,50 -150,60 -125,60 -125,50 -150,50</coordinates>
</gml:LinearRing>
</outerboundaryIs>
</gml:Polygon>
)