angle gauge

The angle gauge is held a set distance away from the eye of the surveyor.

Usually an angle gauge or a wedge prism are used to gather data for this type of plot.

Soon a host of devices from angle gauge, to relascope, to sampling prism were developed.

Each angle gauge is set at a certain basal area factor, or BAF.

It happens when a tree cannot be easily determined as in or out when using a prism or angle gauge.

The PRF is determined based on the type of prism or angle gauge being used.

An angle gauge is a tool used by foresters to determine which trees to measure when using a variable radius plot design in forest inventory.

At each sampling point the researcher used an angle gauge to see if a tree had a larger apparent angle than the gauge.

The wedge prism is primarily used in a similar manner as an angle gauge in variable-radius plot sampling.

An angle gauge is a very similar tool to a wedge prism though it must be held a fixed distance from your eye for it to work properly.

Unlike the wedge prism, which is held over the plot center, the surveyor's eye is kept over plot center when using an angle gauge.

When using an angle gauge the user must count trees that are larger than the width of the angle gauge, as viewed from the center of the plot.

The Relascope is very similar to the angle gauge and the wedge prism in that it can be used to find the basal area of a tree from a point depending on the basal area factor in a variable radius sampling method.