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Forestry Measurements

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Forestry Measurements

  1. 1. Forestry Measurements
  2. 2. Diameter <ul><li>DBH (Diameter Breast Height) </li></ul><ul><ul><li>4.5 ft above ground </li></ul></ul><ul><li>Biltmore Stick </li></ul><ul><ul><li>Measures diameter of tree </li></ul></ul><ul><ul><li>Held 25 inches away </li></ul></ul><ul><ul><li>from eye </li></ul></ul><ul><ul><ul><li>average arm reach of </li></ul></ul></ul><ul><ul><li>logger in early times </li></ul></ul>
  3. 3. Tree Height <ul><li>Merritt Hypsometer </li></ul><ul><ul><li>Measured in number of 16 ft. logs rather than total </li></ul></ul><ul><ul><li>height in ft. </li></ul></ul>
  4. 4. Tree Height
  5. 5. Board Foot
  6. 6. Tree Volume
  7. 7. Length <ul><li>1 Rod 16.5 ft </li></ul><ul><li>1 Chain 66 ft </li></ul><ul><ul><li>4 Rods </li></ul></ul><ul><li>1 Mile 5280 ft </li></ul><ul><ul><li>320 Rods </li></ul></ul><ul><ul><li>80 Chains </li></ul></ul>
  8. 8. Area <ul><li>Acre </li></ul><ul><ul><li>43,56 sq. ft </li></ul></ul><ul><ul><li>10 sq. chains </li></ul></ul><ul><li>Section </li></ul><ul><ul><li>640 acres </li></ul></ul><ul><ul><li>1 sq. mile </li></ul></ul>1 mile or 80 chains 1 mi or 80 chains
  9. 9. Volume / Cord <ul><li>Cord </li></ul><ul><ul><li>Volume of loose stacked wood </li></ul></ul><ul><ul><ul><li>Measures pulp wood </li></ul></ul></ul><ul><ul><ul><li>Measures fire wood </li></ul></ul></ul><ul><ul><li>Based on 128 cu. ft of wood </li></ul></ul>
  10. 10. Basal Area <ul><li>Basal Area </li></ul><ul><ul><li>Cross-sectional area of a tree at DBH </li></ul></ul><ul><ul><li>Measured in </li></ul></ul><ul><ul><ul><li>Sq ft/tree </li></ul></ul></ul><ul><ul><ul><li>Sq ft/acre </li></ul></ul></ul>
  11. 11. Basal Area <ul><ul><li>Point sample with angle gauge </li></ul></ul><ul><ul><ul><li>An estimation </li></ul></ul></ul>

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