- 1). Read regulations and criteria to determine whether they specify surface area or volume calculations for the tree canopy.
- 2). Navigate to a tree canopy calculator, such as TreeWorld.info, in a Web browser.
- 3). Select the type of calculation, surface area or volume, that is required, using the drop-down menu.
- 4). Choose the canopy shape that most nearly matches the canopy shape of the trees that were removed. Select from ellipse, domed, sphere, cylinder and cone shapes.
- 5). Enter the radius of the tree for the shape selected. Consult the illustrations to determine where to take the measurement. For example, find the radius of a cone-shaped tree by measuring from the trunk to the tip of the lowest leaf-bearing branch.
- 6). Enter the height or minor radius measurement of the tree if you selected an ellipse, cylinder or cone shape. Take the height measurement from the lowest leaf-bearing branch to the tip of the tree. Find the minor radius of an ellipse-shaped canopy by measuring from the trunk to the tip of a leaf-bearing branch in the middle of the canopy.
- 7). Press "Calculate." Read the result and record the type of calculation used, as well as the units given with the result.
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