Abstract: A handheld field device for use with outdoor application equipment for measuring and/or surveying is disclosed. The handheld field device may be adapted for entry and display of blueprint data. The handheld field device may include a graphical user interface for providing line segment data entry fields and for displaying input line segments, and storing and calculation means adapted for accepting, storing and editing line segment data associated with said input line segments. The line segment data comprises a starting point, an orientation and a length of each line segment. The storing and calculation means are designed for the provision of a multitude of defined orientations, and the graphical user interface is designed for the provision of a defined orientation selection area, comprising a multitude of orientation selection fields.