Abstract: A planar coordinate resolving system capable of precise resolution of position coordinates of planar images, pictures, sketches, or graphical data. The system consists of a tracing board, to which is attached a dually-pivotable mechanical linkage arm combination, lying parallel to the tracing board and pivotably attached to the board at one arm end. The linkage arm combination is also pivotable at its approximate midsection and has a mechanical pointer at the free end. The pivotability allows full coverage of points on the tracing board by the pointer. A pair of electrical potentiometers located in housings on the linkage arms form the pivot mechanisms. As the arm sections are respectively pivoted, electrical analog signals, proportional to the potentiometer rotor shaft angular change, are applied to a computing device, allowing calculation of the position coordinate of the mechanical pointer location. The resolved images are ultimately displayed on a CRT display or hard-copy printer.