What is the original picture?

The original map is a large-scale original map that is directly derived from actual measurements and is used to derive other maps.

yuántú

Master map: A large-scale original map directly derived from actual measurements and based on which other maps are derived.

Original drawing: The final engineering drawing that has been designed, drawn, and proofread.

Artwork: A pattern formed by drawing lines on a glass plate or cutting and peeling off the adhesive film. If it is reduced, touched or copied, or photographed step by step, an optical mask or preliminary reduction can be made.