What is the application of laser range finder in forestry
Data collection is used for forest resource inventory, that is, tree height, height that can be used as commercial timber, vegetation mapping, wild special tree species, high-quality tree species location, determination of tree grade and economic value in the area, or when carrying out cultivation management research. branches, determining tree locations where specific heights are produced, profiling felled volumes, and determining resource boundaries; used for topography, mapping, and for general purposes of baling lumber pathways when harvesting lumber considering baling lumber methods Pre-construction surveys of roads and rough trails are important. Various problems (eg: cost, accuracy, obstructions, etc.) may be encountered using conventional surveys, aerial photography, and GPS positioning that have been available in the past.
Application of Laser Range Finder in Forestry
Field data collection is a problem that has long plagued surveyors, cartographers, GIS database managers, engineers and researchers. The problem is simple: how to efficiently and accurately collect location and physical characterization data for mapping, cataloging, inventory, and storage in databases.
Finding out the outcome of this problem in a given situation is annoying. because:
(1) There may be many methods and techniques that can be used;
(2) In the vast majority of cases, no method alone can provide complete and satisfactory results.
The application of laser technology, especially the laser rangefinder developed by the American Laser Technology Corporation (LTI), has been perfected since 1990 by the Forestry Bureau of the United States Department of Agriculture as a field measurement prototype and evaluated its future development and application, and can be combined with data acquisition GPS connection, and can be configured with a variety of software, so that forestry surveying advances from hand-operated compass, rope, inclinometer and old-fashioned telescope to the era of single-person operation, all-station, comprehensive multi-purpose instrument.
The measurement system designed by LTI is suitable for basic vegetation resources and timber sales inspection and planning measurement, logging volume distribution map and road survey measurement. By June 1993, the US Forest Service had purchased more than 150 of these instruments. In field planning use by the USDA Forest Service, the laser range finder is not only functional, accurate and durable, but also cost-effective, especially where the target is unclear. This is evident from the scrublands of northern Idaho to the great rain forests of southeastern Alaska.
China, with its vast resources, is rich in forestry resources. With the large-scale production brought about by the reform and opening up, the important position of forestry in the national economy has become increasingly prominent, and the demand for commercial timber has surged. How to plan the development of forestry, measure forestry resources with higher precision, and check and catalog forestry resources with a focus on timber sales have become important issues for the forestry department. Our introduction of laser measurement technology will help promote my country's forestry measurement technology into a new era.
Uses of multifunctional laser measuring systems
(1) Distance measurement----distance measurement is the main function of this instrument, which can directly display horizontal distance or inclined distance.
(2) Azimuth ---- can directly display the magnetic azimuth or relative azimuth of the measurement target.
(3) Inclination angle ---- can display the inclination angle (vertical angle) or the inclination percentage.
(4) Target coordinate program - the target program function is the so-called addressing or stake setting (stakeout) function in measurement, that is, input its coordinates (X, Y, Z) into the instrument at a known point and align it with the measurement target Measurement can immediately display the coordinates of the measured position.
(5) Height measurement ---Use the trigonometry principle (pitch, elevation angle and horizontal distance) to measure the height of objects, including tree heights, building heights, etc.
(6) Measuring function ---- This instrument has another special function program, which can directly enter the measuring function, carry out measuring work and automatically store azimuth, distance, inclination angle and other data, and can be input into the computer for calculation by PC software deal with.
(7) Navigation function——Because it has a magnetic flux compass, it can serve as a navigation function.
