makeVGAPointMap: Create a PointMap grid, fill it and make the graph

In alcyon: Spatial Network Analysis

Create a PointMap grid, fill it and make the graph

Description

This is intended to be a single command to get from the lines to a PointMap ready for analysis

Usage

makeVGAPointMap(
  lineStringMap,
  gridSize,
  fillX,
  fillY,
  maxVisibility = NA,
  boundaryGraph = FALSE,
  verbose = FALSE
)

Arguments

lineStringMap	Map of lines, either a ShapeMap, or an sf lineString map
gridSize	Size of the cells
fillX	X coordinate of the fill points
fillY	Y coordinate of the fill points
maxVisibility	Limit how far two cells can be to be connected
boundaryGraph	Only create a graph on the boundary cells
verbose	Optional. Show more information of the process.

Value

A new PointMap

Examples

mifFile <- system.file(
    "extdata", "testdata", "simple",
    "simple_interior.mif",
    package = "alcyon"
  )
  sfMap <- st_read(mifFile,
    geometry_column = 1L, quiet = TRUE
  )
  shapeMap <- as(sfMap[, vector()], "ShapeMap")
makeVGAPointMap(
  sfMap,
  gridSize = 0.5,
  fillX = 3.01,
  fillY = 6.7,
  maxVisibility = NA,
  boundaryGraph = FALSE,
  verbose = FALSE
)

alcyon documentation built on April 3, 2025, 6:18 p.m.