clinometer survey

 Clinometer survey

clinometer are Using is a forester uses basic trigonometry. The first observer to the object a straight-line distance from the observation point A to D initiatives. Then, clinometer using, the observer measures the angle between the O and object. Between the object and the observer O and B is the same angle. D multiplied by the tangent of an observer is above the height of the object, and the object depth of the observer by the tangent b. Of course the object of adding the total height (H) is.

At a fixed distance from the base of the tree stand. In the United States the most common distance of 50 feet (15.24 meters), 66 feet (20.12 meters), and the speed of the tape measure distance distance is best to use to get accurate readings. For the most accurate readings less than the height of the tree being measured is best to use a distance, the clinometer an angle less than 45 ° (100%) will measure, is.

Observer sites to the top of the tree, measure the total height if desired. Merchantable height measurement is desired - that is, the height of the wood produced can be sold - there is no more merchantable timber tree to a point at which the observer sites. Expressed as a percentage of the observer should note that the slopes. The observer then using percents, down the steps. Observer to the top of the tree lends, and the trees trimmed down the slope. When the ground slopes down, tree based observer will record a negative slope remember. To the top of the tree is subtracted from the slope, it is actually being added. Their distance from the tree then divided by the number 100, and are multiplied.

There is the distance measured along the ground because of some error, is still, and the horizontal distance is not. Standing on tree, observer of his / her mark on the surface of the eye. He stood back, and the slope is expressed as a degree. Is the slope of the land. Taking the cosine of this number, and multiply by the number, the observer will calculate the height of the tree.

The tree is leaning left or right so that the observer must always measure a leaning tree. Measure because it will affect their accuracy because of foreshortening tree leaning toward or away from the observer should not be taken together.

clinometer percent of the general area to shield used by wildlife. This measurement is based on the principles described above, the trigonometric. Measuring slope, however, both observer and target a constant height above the ground requires that, in such a range pole or measurement (HIV) stick is used to measure the height of the slope.
Accuracy
Circa 1918 with Vickers machine gun indirect fire capability designed to enable Clinometer
Digital protractor
2-Axis Digital Inclinometer from Digi-Pas
Let the clinometer
Simple clinometer
Mechanical spirit level with micrometer adjustment is clinometer

Some very sensitive electronic inclinometer sensor 0.0001 degrees can get an output resolution - technology and depending on the angle range, it may be limited to 0.01º. Electronic inclinometers accuracy - (gross mistake which) the right or the accuracy of the inclinometer sensor, however, zero offset and sensitivity of sensors, sensor linearity, hysteresis's, repeatability, and zero and sensitivity temperature drifts in the first set it can be a combination of sensor and depending on the situation usually requires .01º to 2º ±. Room ambient conditions generally linear specification is limited to the accuracy sensors.