Suppose a nomograph with three lines (A, B, and C) is scanned.
What software package allows the user to select tickmark I on line A and draw a set of lines through tickmarks J on line B until they intersect line C?

The software should interpolate the intersection on line C between the tickmarks.

Accuracy of +/- 5% would be acceptable.

Thanks,

Doug Hewett, CSDP

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