Visibility Graph Analysis - Visual local metrics

Runs Visibility Graph Analysis to get visual local metrics

Usage

vgaVisualLocal(
  pointMap,
  nthreads = 1L,
  algorithm = VGALocalAlgorithm$Standard,
  copyMap = TRUE,
  gatesOnly = FALSE,
  progress = FALSE
)

Arguments

pointMap: A PointMap
nthreads: Optional. Number of threads to use (defaults to 1)
algorithm: Optional. The algorithm to use. See ?VGALocalAlgorithm
copyMap: Optional. Copy the internal sala map
gatesOnly: Optional. Only keep the values at specific gates
progress: Optional. Enable progress display

Value

A new PointMap with the results included

Examples

mifFile <- system.file(
    "extdata", "testdata", "simple",
    "simple_interior.mif",
    package = "alcyon"
  )
  sfMap <- st_read(mifFile,
    geometry_column = 1L, quiet = TRUE
  )
  pointMap <- makeVGAPointMap(
    sfMap,
    gridSize = 0.5,
    fillX = 3.0,
    fillY = 6.0,
    maxVisibility = NA,
    boundaryGraph = FALSE,
    verbose = FALSE
  )
vgaVisualLocal(pointMap, FALSE)
#> stars object with 2 dimensions and 10 attributes
#> attribute(s):
#>                                       Min.      1st Qu.       Median
#> Ref                              0.0000000 1.966108e+05 3.932215e+05
#> Connectivity                    39.0000000 6.500000e+01 7.500000e+01
#> Point First Moment              92.0380707 1.451355e+02 1.732670e+02
#> Point Second Moment            240.0000000 3.885625e+02 5.315000e+02
#> blocked                          0.0000000 0.000000e+00 0.000000e+00
#> contextfilled                    0.0000000 0.000000e+00 0.000000e+00
#> filled                           0.0000000 0.000000e+00 1.000000e+00
#> Visual Clustering Coefficient    0.8014629 8.408053e-01 9.060150e-01
#> Visual Control                   0.5896810 8.775250e-01 1.012651e+00
#> Visual Controllability           0.4382023 7.222222e-01 8.333333e-01
#>                                        Mean      3rd Qu.         Max. NA's
#> Ref                            3.932215e+05 5.898322e+05 7.864430e+05    0
#> Connectivity                   7.106667e+01 8.100000e+01 8.800000e+01   66
#> Point First Moment             1.750389e+02 2.021131e+02 2.921885e+02   66
#> Point Second Moment            5.387111e+02 6.655625e+02 1.157750e+03   66
#> blocked                        3.205128e-01 1.000000e+00 1.000000e+00    0
#> contextfilled                  0.000000e+00 0.000000e+00 0.000000e+00    0
#> filled                         5.769231e-01 1.000000e+00 1.000000e+00    0
#> Visual Clustering Coefficient  9.014550e-01 9.466245e-01 1.000000e+00   66
#> Visual Control                 1.000000e+00 1.169747e+00 1.295770e+00   66
#> Visual Controllability         7.899721e-01 9.000000e-01 9.777778e-01   66
#> dimension(s):
#>   from to offset delta x/y
#> x    1 13   1.75   0.5 [x]
#> y    1 12   7.25  -0.5 [y]