larch: Larch Dataset

In forestat: Forest Carbon Sequestration and Potential Productivity Calculation

Larch Dataset

Description

A dataset containing information about larch trees in the Winter Olympics core area.

Usage

larch

Format

A data frame with 4538 rows and 18 variables:

PLOT

Numeric sample plot identifier.

TREE

Tree species code; always "larch" in this dataset.

D

Diameter at breast height (DBH) of the tree, in centimeters.

H

Height of the tree, in meters.

CBH

Crown base height (branch-free height), in meters.

LIFE

Tree condition code: "alive", "broken_head", "broken_tip", "healthy", or "unknown".

CW_E

Horizontal crown extent from the stem toward the east, in meters.

CW_S

Horizontal crown extent from the stem toward the south, in meters.

CW_W

Horizontal crown extent from the stem toward the west, in meters.

CW_N

Horizontal crown extent from the stem toward the north, in meters.

X

Within-plot X-coordinate of the tree, in meters; missing coordinates are NA.

Y

Within-plot Y-coordinate of the tree, in meters; missing coordinates are NA.

SD

Stand density, in trees per hectare.

CLR

Crown length ratio, calculated as crown length divided by tree height.

CW

Mean crown diameter, calculated as the mean of CW_EW and CW_SN, in meters.

CW_EW

East-west crown diameter, calculated as CW_E + CW_W, in meters.

CW_SN

South-north crown diameter, calculated as CW_S + CW_N, in meters.

AGE.GROUP

Age-group label stored in Chinese, with categories corresponding to young, middle-aged, near-mature, mature, and over-mature forest.

Details

Paired zero coordinates used as missing-value placeholders in the source records are represented as NA; an isolated zero is retained as a valid plot-boundary coordinate.

forestat documentation built on Oct. 9, 2026, 9:06 a.m.