Specifications

Print2CAD OCR 2013 - 50
6.2 Scaling of Coordinates
Coordinates in PDF les are usually in a resolution of 72dpi. 72dpi means that one inch
(25.4 mm) equals 72 pixels.
A PDF le can have the accuracy of 25.4/72 = 0.35 mm or 1/72 inch.
A 1200 dpi resolution would make a PDF le with 18.5 * 72/1200 = 1.1 mm or 1/24 inch
accuracy. These types of high-resolution PDF les are rare.
Unfortunately, the scale of a PDF drawing can only be retrieved from the header of a
construction plan.
Find the scale in the header and input it as a scaling factor for the coordinates (e.g. the
scale per the header is 1:50 and therefore the the scaling factor is 50).
Figure: PDF Coordinates with resolution of 72dpi
Figure: Retrieving the scale and plan size from the PDF