Indoor data formats • leaflet.indoor

Simple features

An sf object is the preferred input. The geometry may contain points, multipoints, lines, multilines, polygons, multipolygons, and compatible geometry collections. Each non-empty feature needs at least one floor.

table(sf::st_geometry_type(indoor_demo, by_geometry = TRUE))
#> 
#>           GEOMETRY              POINT         LINESTRING            POLYGON 
#>                  0                  1                  1                  5 
#>         MULTIPOINT    MULTILINESTRING       MULTIPOLYGON GEOMETRYCOLLECTION 
#>                  1                  1                  1                  0 
#>     CIRCULARSTRING      COMPOUNDCURVE       CURVEPOLYGON         MULTICURVE 
#>                  0                  0                  0                  0 
#>       MULTISURFACE              CURVE            SURFACE  POLYHEDRALSURFACE 
#>                  0                  0                  0                  0 
#>                TIN           TRIANGLE 
#>                  0                  0

The floor column may be numeric, character, or factor. Use a list-column for a feature shared across floors:

rooms$level <- list(c("0", "1"), "1", c("1", "2"))

A bare sfc has no attributes, so pass one floor value per geometry:

geometry <- st_geometry(indoor_demo[1:2, ])
leaflet(options = leafletOptions(crs = leafletCRS("L.CRS.Simple"))) |>
  addIndoor(data = geometry, level = c("0", "1"), crs = "simple")

GeoJSON

addIndoor() accepts a local .geojson file, a JSON string, an R list representing a Feature or FeatureCollection, or a list of features. Remote URLs are intentionally not downloaded.

GeoJSON properties are available to label, popup, layerId, and style formulas. Under an ordinary map, GeoJSON coordinates are interpreted as longitude and latitude. Use crs = "simple" for a local coordinate structure.

geojson_file <- tempfile(fileext = ".geojson")
geojson_demo <- indoor_demo_geo[c(1:3, 6:10), ]
geojson_demo$level <- vapply(geojson_demo$level, `[[`, character(1), 1)
sf::st_write(geojson_demo, geojson_file, quiet = TRUE)

leaflet() |>
  addIndoor(
    data = geojson_file,
    label = ~name,
    popup = ~description,
    layerId = ~feature_id
  ) |>
  addIndoorControl()

SpatVector

When the suggested terra package is installed, SpatVector input is converted with sf::st_as_sf(). Attributes and the declared CRS are then handled exactly like ordinary sf input.

rooms_terra <- terra::vect(indoor_demo_geo)
leaflet() |>
  addIndoor(rooms_terra, label = ~name) |>
  addIndoorControl()

Empty and invalid data

A zero-row feature collection is valid and creates an empty indoor data set. Its control displays No levels. Individual empty geometries, unsupported curve types, non-finite coordinates, duplicate layerId values, and malformed GeoJSON are rejected with feature-specific errors.