I have indexed an extract of Taniwani's track to show the Panama/San Blas area. The usual three files types are available BUT in the east I suspect Google is well adrift. This is not unusual for early low-resolution Google images but is unusual for the higher resolution images - for example those just to the east of Portobello. The canal region seems to be correct. It seems unlikely that a gps offset has been applied to Taniwani's track but I must try to check this. LATER NOTE:::: offset may well have been applied - in which case scrap all files.