NS TRAIN SERVICES AND STATIONS
Historically, the main line through Apeldoorn was the "Oosterspoorweg" (Eastern Railway) line from Amsterdam and Amersfoort to Zutphen. But east of Apeldoorn, the line to Deventer Almelo and Hengelo is now part of the double track electrified main line. While the line southeast to Zutphen remains as a single track diesel operated branch line.
Mapping the Station and Lines
Zoomable Google Maps show the station and rail routes in the area.
Wikipedia link containing further station information and history.