Reference map object

[Wally Maddoc]

Hi Roman

if $map is your map object than the lines below would set the extent of the
reference map:

$map->reference->set('minx',-180)
$map->reference->set('miny',-180)
$map->reference->set('maxx',180)
$map->reference->set('maxy',180)

(The numbers -180, 180 are just examples)

I hope it helps. 
Erik