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  2. Girard form class - Wikipedia

    en.wikipedia.org/wiki/Girard_form_class

    Girard form class is a form quotient calculated as the ratio of diameter inside bark at the top of the first 16 foot log to the diameter outside bark at breast height ().Its purpose is to estimate board-foot volume of whole trees from measurement of DBH, estimation of the number of logs, and estimation of the taper of the first log, based on the general relationships identified between the ...

  3. Tree measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_measurement

    To calculate trunk volume, the tree is subdivided into a series of segments with the successive diameters being the bottom and top of each segment and its length equal to the difference in height between the lower and upper diameter. Cumulative trunk volume is calculated by adding the volume of the measured segments of the tree together.

  4. Tree volume measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_volume_measurement

    To calculate trunk volume, the tree is subdivided into a series of segments with the successive diameters being the bottom and top of each segment and segment length being equal to the difference in height between the lower and upper diameters, or if the trunk is not vertical, the segment length can be calculated using the limb length formula ...

  5. Coverage ratio - Wikipedia

    en.wikipedia.org/wiki/Coverage_ratio

    Coverage ratio may refer to Building coverage ratio, related to floor area ratio; Debt service coverage ratio; Interest coverage ratio This page was last edited on 6 ...

  6. Floor area ratio - Wikipedia

    en.wikipedia.org/wiki/Floor_area_ratio

    Not to be confused with Grundflächenzahl (GRZ), which is the Site Coverage Ratio. In India floor space index (FSI) and floor area ratio (FAR) are both used. [7] In the United Kingdom and Hong Kong both plot ratio and site ratio are used. [8] [9] In Singapore the terms plot ratio and gross plot ratio (GPR) are more commonly used.

  7. Angle of repose - Wikipedia

    en.wikipedia.org/wiki/Angle_of_repose

    Stop pouring the material when the pile reaches a predetermined height or the base a predetermined width. Rather than attempt to measure the angle of the resulting cone directly, divide the height by half the width of the base of the cone. The inverse tangent of this ratio is the angle of repose.

  8. Void ratio - Wikipedia

    en.wikipedia.org/wiki/Void_ratio

    where is the void ratio, is the porosity, V V is the volume of void-space (gases and liquids), V S is the volume of solids, and V T is the total (or bulk) volume. This figure is relevant in composites , in mining (particular with regard to the properties of tailings ), and in soil science .

  9. Robinson–Foulds metric - Wikipedia

    en.wikipedia.org/wiki/Robinson–Foulds_metric

    The Robinson–Foulds or symmetric difference metric, often abbreviated as the RF distance, is a simple way to calculate the distance between phylogenetic trees. [1]It is defined as (A + B) where A is the number of partitions of data implied by the first tree but not the second tree and B is the number of partitions of data implied by the second tree but not the first tree (although some ...