quadslope: Given the elevation at four corners of a square of...

In forestgeo/ctfs: Tools for the Analysis of Forest Dynamics

Description

Given the elevation at four corners of a square of side=gridsize, this estimates the slope in degrees of the terrain over that square. The slope is calculated for each of the 4 planes defined by omitting one of the points.

quadslope() divides the 4 corners of a quadrat into 4 different groups of 3 stakes, takes the slope of each, then averages these were first written in C++ see slopeelev.cpp for more on the geometry.

The 4 slopes are averaged. Returns both the mean slope and the sqrt of the variance of the 4 different slopes.

Usage

quadslope(cornerelev, gridsize = 20)

Arguments

cornerelev	vector of 4 elevations
gridsize	Side of the square quadrate.

See Also

calcslope(), quadslope()

forestgeo/ctfs documentation built on May 3, 2019, 6:44 p.m.