Hi guys: I write the fellowing code to test map' xrange and yrange using IDL 8.2.3. With 'Stereographic' projection and disabling window' refresh, the map's xrange and yrange equal [0,0]. But for other projection (like Lambert) or enabled window' refresh, the map's xrange and yrange is OK. So why? How can I solve this problem? Very thanks! PRO test_map w = window() w.refresh, /disable mp_bg = MAP('Stereographic', /current, $ CENTER_LONGITUDE=110, $ CENTER_LATITUDE=90) OLDXRANGE = mp_bg.xrange OLDYRANGE = mp_bg.yrange print, OLDXRANGE, OLDYRANGE mp_bound = MAPCONTINENTS(/COUNTRIES, COLOR='BLACK') w.refresh mp_bg.xrange = OLDXRANGE mp_bg.yrange = OLDYRANGE stop w.erase w.refresh, /disable mp_bg = MAP('Lambert Conformal Conic', /current, $ STANDARD_PAR1=20, $ STANDARD_PAR2=30, $ limit=[0,60,50,130]) OLDXRANGE = mp_bg.xrange OLDYRANGE = mp_bg.yrange print, OLDXRANGE, OLDYRANGE mp_bound = MAPCONTINENTS(/COUNTRIES, COLOR='BLACK') w.refresh mp_bg.xrange = OLDXRANGE mp_bg.yrange = OLDYRANGE END