Calibration Discrepancy in Autodesk.Measure: Snapping vs. Non-Snapping Results in Significant Measurement Differences

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We are encountering issues when calibrating a PDF document using Autodesk.Measure. When we calibrate with snapping enabled at both ends, the calibration factor is approximately 72 times smaller than when we calibrate without snapping at both ends.

and it seems to be a bug when you make a calibration using snapping and not snapping. You can easily reproduce this bug. For convenience, I used this project on GitHub: Offline PDF Markup.

Step 1: Make a calibration using snapping (I use meters because I don’t understand the imperial system 😁).
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Step 2: Make two equal distance measurements using snapping at both ends of the distance measurement.
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Step 3: Make a new calibration of the same length as Step 1, but this time without snapping. It needs to be a free measurement calibration.
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Step 4: Make two equal distance measurements without using snapping. These need to be free measurements. I made them on the left where I drew the free calibration.
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We are also facing this issue in our production application. We need to set snapper.setSnapToPixel(true); because some PDFs used by our customers are not vectorized. We hope you can provide us with a solution to this problem.

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