get_tri: A wrapper function to 'gDelaunayTriangulation()' to perform...

In validmeasures/spatialsampler: An Implementation of the Centric Systematic Area Sampling (CSAS) and Simple Spatial Sampling Method (S3M) sampling approaches in R

Description

A wrapper function to gDelaunayTriangulation() to perform Delaunay triangulation with additional options to specify thresholds for suppressing long sided triangles

Usage

get_tri(
  input,
  x,
  y,
  crs = "+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0",
  qTSL = 0.975
)

Arguments

input	A data frame of locations with at least information on longitude and latitude coordinates of the locations.
x	A character value specifying the variable name of the longitude information in input.
y	A character value specifying the variable name of the latitude information in input.
crs	A character value specifying the coordinate reference system to be used for Delaunay triangulation. Default is longlat projection with datum WGS84 ("+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0")
qTSL	Maximum side length to be allowed to draw sides of triangles. Value can be between 0 to 1. Default value is 0.975.

Value

A SpatialPolygons object of Delaunay triangulation of input data

Examples

#

validmeasures/spatialsampler documentation built on Oct. 16, 2021, 3:15 a.m.