makeVGAGraph: Create a graph between visible cells in the LatticeMap

In alcyon: Spatial Network Analysis

Create a graph between visible cells in the LatticeMap

Description

Create a graph between visible cells in the LatticeMap

Usage

makeVGAGraph(
  latticeMap,
  boundaryGraph = FALSE,
  maxVisibility = NA,
  copyMap = TRUE,
  verbose = FALSE
)

Arguments

latticeMap	The input LatticeMap
boundaryGraph	Only create a graph on the boundary cells
maxVisibility	Limit how far two cells can be to be connected
copyMap	Optional. Copy the internal sala map
verbose	Optional. Show more information of the process.

Value

A new LatticeMap with a graph between points

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")
lineStringMap <- as(sfMap, "sf")
mapRegion <- sf::st_bbox(lineStringMap)
latticeMap <- createGrid(
  minX = mapRegion[["xmin"]],
  minY = mapRegion[["ymin"]],
  maxX = mapRegion[["xmax"]],
  maxY = mapRegion[["ymax"]],
  gridSize = 0.5
)
latticeMap <- blockLines(
  latticeMap = latticeMap,
  lineStringMap = lineStringMap[vector()]
)
latticeMap <- fillGrid(
  latticeMap = latticeMap,
  fillX = 3.01,
  fillY = 6.7
)
makeVGAGraph(
  latticeMap = latticeMap,
  boundaryGraph = FALSE,
  maxVisibility = NA
)

alcyon documentation built on Aug. 30, 2026, 1:07 a.m.