bciquad.info {CTFS}R Documentation

Dataset of Information for each 20 by 20 m quadrate in the BCI 50 ha plot

Description

A tabulation of information on each quadrate that is dervied from the initial establishment of the plot (elevation, convexit and slope) and from further analyses of these and other topographic or local environmental features. These characteristics are independent of the trees that occupy the quadrates and their species identification.

Usage

data(bciquad.info)

Format

A data frame with 1250 observations on the following 5 variables.

elev
a numeric vector, elevation, msl
convex
a numeric vector
slope
a numeric vector
hab
a numeric vector, a value from 1 to n, assigned by investigator. Combinations of altitude, slope and convexity, mapped location of streams, swamps, etc. can be used to define habitats
quad
a factor with levels 1250 in the standard 50 Ha Plots

Details

bciquad.info variables have the following values:

hab
the habitat assigned to a quadrate by topographic values. These values have been assigned by the habitat analysis function associated with the "torus" analysis.
Code Habitat_Type Number_Quadrates
1 low_plateau 168
2 hi_plateau 81
3 low_slope 277
4 hi_slope 99
5 low_hill 173
6 hi_hill 203
7 low_hilly_slope 129
8 hi_hilly_slope 120
“.” missing 0
quad
an "index" number for each quadrates. For this BCI dataset a quadrate is 20 by 20 m and there are 1250 of them in a 1000 by 500 m plot. The convention is to number the quadrates starting in the southwest corner and going northward up a "column" of 25, and returning to the southern border for 26-50, etc.
25 50 75 ... 1250
24 49 74 ... 1249
. . . ... .
. . . ... .
. . . ... .
3 28 53 ... 1228
2 27 52 ... 1227
1 26 51 ... 1226

Source

The Center for Tropical Forest Science
http://www.ctfs.si.edu

Examples

## Not run: 
str(bciquad.info)
## End(Not run)

[Package CTFS version 1.00 Index]