-
...per and lower marks (b and c in Figure 1) on the device. The height of the tree can now be read where the top of the pole is being seen on the ruler. This
where <math>h</math> is the total height of the tree, <math>l</math> is the (known) length of the pole, <math>h’</math> is the
3 KB (575 words) - 11:58, 27 October 2013
-
...ice measures the elevation angle between the operator and measured points. Tree heights can directly be read from the device depending on fixed distances o
* the scales of height measurement for the fixed distances to the tree (15, 20, 30 and 40m) and
5 KB (740 words) - 08:28, 12 March 2021
-
[[File:transponder.jpg|thumb|300px|Figure 2: Transponder fixed at a tree)]]
...o determine the [[The trigonometric principle|horizontal distance]] to the tree the transponder has to be fixed at a certain height (default 1,3 meter) tha
5 KB (740 words) - 08:30, 12 March 2021
-
... disk at the front of the device. A reference tape can be installed at the tree to determine the distance optically.
# Place the reference tape at the tree,
2 KB (315 words) - 17:30, 29 October 2013
-
...erent crown cover was deemed to be an efficient sampling approach. But the tree cover was so irregular in its spatial distribution that it appeared impossi
... along river Tarim in North-Western China. Here, a stratification along crown cover can hard-ly be done by delineation and pre-stratification but double
3 KB (512 words) - 11:59, 26 October 2013
-
...ure the [[Ancillary variable|ancillary variable]], for example percentage crown cover. In the second phase, field plots are selected to measure the target
This example is on the estimation of [[leaf area]] of a tree, as, for example, needed to determine the [http://en.wikipedia.org/wiki/Le
2 KB (324 words) - 15:17, 26 October 2013
-
...ticular in large area forest inventories, it is necessary to define what a tree is; it is hardly necessary for example, for a plantation forest inventory w
...bamboo and palms: include them or not? The stipulated definition of what a tree is, might have direct consequences on the [[Forest Definition|forest defini
2 KB (320 words) - 08:42, 28 October 2013
-
...Tree height|height]] of the tree vegetation, [[Minimum crown cover|minimum crown coverage]], and in some countries also minimum productivity (<math>m^3/ha</
...ems ‑ which fulfill many of the “biophysical” criteria of sufficient tree cover, but are obviously not a forest because used for agriculture.
12 KB (1,873 words) - 08:02, 28 October 2013
-
...ween forest and non-forest where a dense forest is gradually opening up to tree-free land, as for example at the [[timber line]] or at the boundary of dese
... to a forest boundary that goes along the connecting line between border [[Tree Definition|stems]].
2 KB (352 words) - 08:02, 28 October 2013
-
...ight|300px|thumb|'''Figure 1''' A set of reference pictures for percentage crown cover.]]
...n be used as the one given in Figure 1. Some issues regarding the minimum crown cover will be discussed in this section.
5 KB (758 words) - 08:02, 28 October 2013
-
...est mensuration|forest mensuration]] because most measurements on standing tree have to be made ‘over bark’. However, in many countries, the bark thick
...he bark thickness of living tree may be measured with little damage to the tree using a [[bark gauge]] (Figure 1).
2 KB (247 words) - 12:03, 27 October 2013
-
[[File:2.6.3-fig23.png|left|285px|thumb|'''Figure 1''' Illustration of some crown attributes (after Kramer & Akca 1986<ref name="kramer&akca1986">Kramer, H.
...orrelated with the growth of the tree as the tree crown is the part of the tree, which contains the photosynthesizing tissue, absorbs radiation and produce
3 KB (492 words) - 12:03, 27 October 2013
-
[[File:2.6.6-fig26.png|left|200px|thumb|'''Figure 1''' Tree sociological position: ''1'' predominant ''2'' dominant ''3'' co-dominant '
... production potential of a tree. According to the sociological position, a tree is commonly assigned in one out of 5 categories as predominant, dominant, c
1 KB (216 words) - 12:11, 27 October 2013
-
...s can visually usually not be recognized. Depending on the stem shape, the tree [[Stem volume|volume]] may be very different for one and the same [[Diamete
...e which is much higher than the tree volume. Then, in order to come to the tree volume, we need to introduce a reduction factor, which reduces the cylinder
4 KB (671 words) - 08:34, 12 March 2021
-
...e term “allometric”) such as [[diameter at breast height]] (dbh) and [[tree height]].
...pically including [[minimum crown cover]], minimum area, minimum width and tree height).
17 KB (2,464 words) - 07:47, 28 October 2013
-
...or the “[[biodiversity]]” or the “situation of the [[Tree Definition|tree]] resource outside the forest” or the “sustainability of [[forest manag
...tion|slope correction]] and [[border trees]], or nominal variables such as tree species (where the letter is frequently not referred to as measurement erro
20 KB (3,158 words) - 10:34, 27 November 2014
-
...irborne laser scanners face problems in detecting the lower parts of the [[Tree Definition|trees]].
...r|canopy cover]], [[plant area index]], [[competition indices]] as well as tree lean, sweep and [[Stem shape|taper]] and others more.
7 KB (1,071 words) - 08:35, 12 March 2021
-
...ation angles to the tree top and bottom are measured from fixed distances. Tree height can then be read from the scales for the respective distance. Some S
# Select desired distance (15m, 20m) to the tree,
2 KB (367 words) - 08:29, 12 March 2021
-
...e trigonometric principle]]. Therefore the angles between the user and the tree top and bottom are measured.
# sight the object (tree) and focus parallel with both eyes open
2 KB (250 words) - 06:38, 15 April 2019
-
...e:''' Sub-project B05 - Methodological approaches to the assessment of all tree resources in transition systems in forested tropical landscapes
...for forest products and transformation of natural forests into high yield tree or agricultural crops for food, fodder and biofuel. It is a challenge for
6 KB (893 words) - 16:01, 26 October 2013
