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| the diameter of a standing tree measured 4.5 ft above ground |
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| the height of logs in a standing tree that will be harvested. Merchantable height is often limited by a minimum diameter for the small end of a log (10” inside diameter) that a mill will accept for a given product class. |
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| a specially graduated measuring tape used to measure the DBH of standing trees. |
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| a scale printed on a cruiser’s stick that can be used to measure the DBH of standing trees. |
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| a measure of merchantable height that is equivalent to the number of 8-foot long logs (or 16-foot long logs) that can be harvested from a tree. Locally, Merchantable height is typically measured to the nearest 8’ log, or 8-foot section. |
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| a table that provides estimated volumes for trees of a given DBH and merchantable height. |
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| a measure of how quickly a tree’s diameter decreases with height above the ground. The greater the taper, the less wood volume a tree can contain. |
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Definition
the cross-sectional area of a tree at breast height. Basal area is typically reported in square feet and is calculated for an individual tree using the formula:
BA = 0.005454 × DBH2, where DBH is measured in inches. |
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Definition
| Determining the acreage and boundaries of your tract. |
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Definition
| 100 percent tally: The simplest type of inventory to understand is the 100 percent tally. In this type of inventory, you measure all the trees on your forested tract. |
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| fixed-radius plot sampling: In fixed-radius plot sampling, instead of measuring all the trees in a forested tract, only trees occurring on a number of selected circular plot areas are measured. |
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Definition
| variable-radius plot sampling: Variable-radius plot sampling (also known as angle gauge sampling, prism sampling or point sampling) is one of the most common and efficient sampling methods for timber inventory. |
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Term
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Definition
| Wedge prisms are used to determine whether or not to count a tree at a point sample. The prisms we have for class are 10 BAF prisms. Trees are counted as in, if the offset image at breast height viewed through the prism and the actual image of the tree have some overlap. If there is no overlap, the tree is not tallied. With a prism the PRISM is the center of the point and must be held over your point center marker. |
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Definition
| For borderline trees, measure the dbh and the distance to the tree. The distance should be measured to the “center” of the tree, NOT THE FACE of the tree. If the tree is equal to or closer than the limiting distance for its dbh, then it is tallied. Limiting distances for 10 BAF prisms and gauges are listed in the table below. The table goes to 10ths of an inch. For an example, the limiting distance for a 15.4 in dbh tree is 42.35 feet . Any 15.4 in dbh tree 42.35 ft or closer to the sample point is counted. If you forget your table, but have a calculator, you can determine the limiting distance in feet for a tree by multiplying the diameter (in inches) by 2.75 (for BAF 10 sampling only). For instance, a 10.0” tree can be 27.5 feet away, |
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Definition
| To travel or pass across, over, or through. |
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| is a surveyor's mark at the beginning location for the wide-scale surveying of land. |
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| is the principal north-south line used for survey control in a large region, and which divides townships between east and west. |
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| A surveyed line established with more than usual care, to which surveys are referred for coordination and correlation. |
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| A division of a county with some corporate power |
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| What us the US Public land survey system |
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Definition
| s a way of subdividing and describing land in the United States. All lands in the public domain are subject to subdivision by this rectangular system of surveys, which is regulated by the U.S. Department of the Interior, Bureau of Land Management (BLM). |
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| When was the Public land survey system created and why |
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Definition
The Land Ordinance of 1785 was the beginning of the Public Land Survey System.
Originally proposed by Thomas Jefferson to create a nation of "yeoman farmers",[3] the PLSS began shortly after the American Revolutionary War, when the federal government became responsible for large areas of land west of the original thirteen states. The government wished both to distribute land to Revolutionary War soldiers in reward for their services, as well as to sell land as a way of raising money for the nation. Before this could happen, the land needed to be surveyed. |
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Definition
| is a system or method of describing land,it is used physical features of the local geography, along with directions and distances, to define and describe the boundaries of a parcel of land. |
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