Skip to contents

WMS INSPIRE: Download map images

Source: R/wms-all.R
catr_wms_get_layer.Rd

Get geotagged images from the Spanish Cadastre. This function is a wrapper of mapSpain::esp_get_tiles().

Usage

catr_wms_get_layer(
  x,
  srs = NULL,
  what = c("building", "buildingpart", "parcel", "zoning", "address", "admboundary",
    "admunit"),
  styles = "default",
  update_cache = FALSE,
  cache_dir = NULL,
  verbose = FALSE,
  crop = FALSE,
  options = NULL,
  ...
)

Arguments

x

See Details. It could be:

  • A numeric vector of length 4 with the coordinates that defines the bounding box: c(xmin, ymin, xmax, ymax)

  • A sf/sfc object, as provided by the sf package.

srs

SRS/CRS to use on the query. To check the admitted values check catr_srs_values, specifically the wfs_service column. See Details.

what

Layer to be extracted, see Details.

styles

Style of the WMS layer. See Details.

update_cache

logical. Should the cached file be refreshed? Default is FALSE. When set to TRUE it would force a new download.

cache_dir

A path to a cache directory. On NULL the function would store the cached files on a temporary dir (See base::tempdir()).

verbose

logical. If TRUE displays informational messages.

crop

logical. If TRUE, the results will be cropped to the specified x extent. If x is an sf object with one POINT, crop is set to FALSE. See terra::crop().

options

A named list containing additional options to pass to the query.

...

Arguments passed on to mapSpain::esp_get_tiles

res

character string or number. Only valid for WMS providers. Resolution (in pixels) of the final tile.

bbox_expand

number. Expansion percentage of the bounding box of x.

transparent

logical. Provides transparent background, if supported.

mask

logical. TRUE if the result should be masked to x. See terra::mask().

Value

A SpatRaster is returned, with 3 (RGB) or 4 (RGBA) layers, see terra::RGB().

Details

When x is a numeric vector, make sure that the srs matches the coordinate values. When x is a sf object, the value srs is ignored.

The query is performed using EPSG:3857 (Web Mercator) and the tile is projected back to the SRS of x. In case that the tile looks deformed, try either providing x or specify the SRS of the requested tile via the srs parameter, that ideally would need to match the SRS of x. See Examples.

Layers

The parameter what defines the layer to be extracted. The equivalence with the API Docs equivalence is:

  • "parcel": CP.CadastralParcel

  • "zoning": CP.CadastralZoning

  • "building": BU.Building

  • "buildingpart": BU.BuildingPart

  • "address": AD.Address

  • "admboundary": AU.AdministrativeBoundary

  • "admunit": AU.AdministrativeUnit

Styles

The WMS service provides different styles on each layer (what parameter). Some of the styles available are:

  • "parcel": styles : "BoundariesOnly", "ReferencePointOnly", "ELFCadastre".

  • "zoning": styles : "BoundariesOnly", "ELFCadastre".

  • "building", "buildingpart": "ELFCadastre"

  • "address": "Number.ELFCadastre"

  • "admboundary", "admunit": "ELFCadastre"

Check the API Docs for more information.

References

API Documentation.

INSPIRE Services for Cadastral Cartography.

See also

mapSpain::esp_get_tiles() and terra::RGB(). For plotting see terra::plotRGB() and tidyterra::geom_spatraster_rgb().

INSPIRE API functions: catr_atom_get_address(), catr_atom_get_address_db_all(), catr_atom_get_buildings(), catr_atom_get_buildings_db_all(), catr_atom_get_parcels(), catr_atom_get_parcels_db_all(), catr_wfs_get_address_bbox(), catr_wfs_get_buildings_bbox(), catr_wfs_get_parcels_bbox(), inspire_wfs_get()

Other spatial: catr_atom_get_address(), catr_atom_get_buildings(), catr_atom_get_parcels(), catr_wfs_get_address_bbox(), catr_wfs_get_buildings_bbox(), catr_wfs_get_parcels_bbox()

Examples

# \donttest{

# With a bbox

pict <- catr_wms_get_layer(
  c(222500, 4019500, 223700, 4020700),
  srs = 25830,
  what = "parcel"
)

library(mapSpain)
library(ggplot2)
library(tidyterra)
#> 
#> Attaching package: ‘tidyterra’
#> The following object is masked from ‘package:stats’:
#> 
#>     filter

ggplot() +
  geom_spatraster_rgb(data = pict)


# With a spatial object

parcels <- catr_wfs_get_parcels_neigh_parcel("3662303TF3136B", srs = 25830)

# Use styles

parcels_img <- catr_wms_get_layer(parcels,
  what = "buildingpart",
  srs = 25830, # As parcels object
  bbox_expand = 0.3,
  styles = "ELFCadastre"
)

ggplot() +
  geom_sf(data = parcels, fill = "blue", alpha = 0.5) +
  geom_spatraster_rgb(data = parcels_img)

# }