Use Ray Proportion Percent when you need to compute the wood ray proportion in percent as the ray pixel area divided by the total cross-section pixel area times one hundred. Enter Ray area and Total section area using the definitions and units below so the result can be reproduced.

Ray area

An integer count or setting greater than or equal to 0, expressed in pixels.

Total section area

An integer count or setting greater than or equal to 1, expressed in pixels.

The published tool contract uses this rule: Compute the wood ray proportion in percent as the ray pixel area divided by the total cross-section pixel area times one hundred.

Wood ray proportion

The calculated wood ray proportion in %.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Ray area and Total section area values and their units alongside the result. Stem Wood Density is useful when you instead need to compute stem wood density in grams per cubic centimetre as oven-dry stem mass divided by stem volume. Wood Density provides another view by helping you compute basic wood density in grams per cubic centimetre as oven-dry mass divided by fresh volume.

• Stem Wood Density

  Compute stem wood density in grams per cubic centimetre as oven-dry stem mass divided by stem volume.

• Wood Density

  Compute basic wood density in grams per cubic centimetre as oven-dry mass divided by fresh volume.

• Wood Specific Gravity

  Compute wood specific gravity as oven dry mass divided by water displacement volume in cubic centimetres.