There are three terms that are commonly used to determine the size of an object related to measurement in a broad sense, ie the measurement, interpretation and forecasting. Do you know the difference between these three terms?
Understanding third term measurements as shown below, namely:
1. Measurement
Measurement is the observations made by direct measurement using a specific measuring instrument and was made to all the objects observed.
2. interpretation
The interpretation is the observation made by using a specific measuring instrument but only partially carried out on the object observed. Object observed is called population was part of the observed object is called a sample (sample). If the population is trees in the forest, then sample a collection of trees found in the plots (PU). The plot can be circular, square, rectangular or track. The interpretation is done in several ways, including through:
a. Method number form.
b. Rates / local table.
c. Table stands.
d. Table of results.
e. Table class form.
3. Forecasting
Forecasting is an activity to determine the value of an object by attempting to measure the conditions that will come with the data obtained in the past by a certain time. Forecasting is commonly used in the field of meteorology and geophysics as well as the macro economy.
Of the three terms mentioned above, measurement is the topic of discussion in the textbook teaching materials this student. In the measurement usually always encountered an error (bias).
Based on the source, the error is divided into two, namely:
a. sampling Error
Sampling error is an error that arises due to the sample size, sample size, and shape of the sample and sampling methods used. Sampling error often occurs in the interpretation and forecasting.
b. Non-sampling errors
Non-sampling error is an error caused by its own measurement factors, among others:
- The person or researcher.
- Tool.
- Situation and condition.
- It is not clear how the measurement.
- Their peculiarities shape of an object.
Legacy and Usability
Older or scope of the measurement procedure for measuring the dimensions of wood is wood (trees), including its calculations. Therefore, the science of measuring timber is the primary tools in studying the implementation of forestry activities, such activities include forest inventory, forest cultivation (silviculture), forest exploitation (harvest forest products), marketing of forest products. So, Ash’ari et al. (2012) states that the role / usefulness timber geometry when viewed from legacy activities, are:
(1) Measurement of dimensional lumber / tree stand to determine the potential of the main activities in forest inventory.
(2) Measurement of dimensional lumber / tree felling including processed products in the form of certain sortimen, to determine the volume of production acquired (forest exploitation, measurement & testing timber).
(3) Measurement of dimensional growth of timber / trees and other forest products for the regulation of forest products, including maintenance (increment, age cutting, felling rotation, time of thinning on plantations).