Scaling techniques are pretty much the same for all types of logs. Measure diameter inside the bark at the small end of the log. If the log isn't round, then average the long way with the short way. Measure the length. Usually to the closest even foot.
Deductions should be taken for sweep and rot. Grade is determined by the number and location of defects. Defect free is usually veneer quality. Grade #1 can include a knot or two, depending on location. Grade #2 generally needs 2 clear sides. Grade #3 is everything else. Of course, grade qualifications will vary from user to user.
From the diameter and the length you can determine the volume by various scales. Most veneer buyers and may mills use the Doyle scale. Sawed lumber will come closer to the International scale, with overrun for thin band mills.
To get the volume, click the toolbox icon. There are lots of calculators there. Look up the log volume calculator. Put in the diameter and the length and volume will be displayed in Doyle, Scribner, and International.
