public SpatialReference getOutputSRS(Session session, SpatialReference terrain_srs)
{
if (!grid_valid || output_srs == null)
{
if (levels.Count > 0 && levels[0].getFilterGraph() != null)
{
FilterEnv env = session.createFilterEnv();
env.setTerrainSRS(terrain_srs);
FilterList filters = levels[0].getFilterGraph().getFilters();
for (int ind = filters.Count - 1; ind >= 0; ind--) //reverse iterator?
{
if (output_srs != null)
{
break;
}
Filter i = filters[ind];
if (i is TransformFilter)
{
TransformFilter xf = (TransformFilter)i;
if (xf.getUseTerrainSRS())
{
if (env.getTerrainSRS() != null)
{
this.output_srs = env.getTerrainSRS();
}
}
else if (xf.getSRS())
{
this.output_srs = (SpatialReference)(xf.getSRS());
}
else if (xf.getSRSScript())
{
ScriptResult r = env.getScriptEngine().run(xf.getSRSScript(), env);
if (r.isValid())
{
this.output_srs = session.getResources().getSRS(r.asString());
}
else
{
env.getReport().error(r.asString());
}
}
}
}
if (output_srs == null) // no reproject..assume input srs
{
this.output_srs = levels[0].getFeatureLayer().getSRS();
}
}
}
return(output_srs);
}
