According to this:

https://github.com/B3Partners/jump-b3p/blob/master/src/main/java/com/vividsolutions/jump/io/GMLReader.java

Around Line 202-218

BaseX needs to turn on the capability per line 217-281 (I suggest by default) or allow users to turn it on.

On Mon, Nov 13, 2017 at 6:38 PM, Christian Grün <christian.gruen@gmail.com> wrote:

The Geo Module is basically a light-weight wrapper for the JTS Topology Suite: geo:srid calls getSRID() (see [1]). Maybe you could ask on the jts mailing list and give us some feedback?

[1] https://github.com/BaseXdb/basex/blob/master/basex-api/src/main/java/org/expath/ns/Geo.java

Am 14.11.2017 12:23 vorm. schrieb "E. Wray Johnson" <wray.johnson@gmail.com>:

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>
  )