Get sf polygons of the national geographic grids provided by IGN

Loads a sf polygon with the geographic grids of Spain.

Usage

esp_get_grid_MTN(
  grid = "MTN25_ETRS89_Peninsula_Baleares_Canarias",
  update_cache = FALSE,
  cache_dir = NULL,
  verbose = FALSE
)

Source

IGN data via a custom CDN (see https://github.com/rOpenSpain/mapSpain/tree/sianedata/MTN).

Arguments

grid: Name of the grid to be loaded. See Details.
update_cache: A logical whether to update cache. Default is FALSE. When set to TRUE it would force a fresh download of the source file.
cache_dir: A path to a cache directory. See About caching.
verbose: Logical, displays information. Useful for debugging, default is FALSE.

Value

A sf polygon

Details

Metadata available on https://github.com/rOpenSpain/mapSpain/tree/sianedata/MTN.

Possible values of grid are:

grid_name

MTN25_ED50_Peninsula_Baleares

MTN25_ETRS89_ceuta_melilla_alboran

MTN25_ETRS89_Peninsula_Baleares_Canarias

MTN25_RegCan95_Canarias

MTN50_ED50_Peninsula_Baleares

MTN50_ETRS89_Peninsula_Baleares_Canarias

MTN50_RegCan95_Canarias

MTN Grids

A description of the MTN (Mapa Topografico Nacional) grids available:

MTN25_ED50_Peninsula_Baleares

MTN25 grid corresponding to the Peninsula and Balearic Islands, in ED50 and geographical coordinates (longitude, latitude) This is the real MTN25 grid, that is, the one that divides the current printed series of the map, taking into account special sheets and irregularities.

MTN50_ED50_Peninsula_Baleares

MTN50 grid corresponding to the Peninsula and Balearic Islands, in ED50 and geographical coordinates (longitude, latitude) This is the real MTN50 grid, that is, the one that divides the current printed series of the map, taking into account special sheets and irregularities.

MTN25_ETRS89_ceuta_melilla_alboran

MTN25 grid corresponding to Ceuta, Melilla, Alboran and Spanish territories in North Africa, adjusted to the new official geodetic reference system ETRS89, in geographical coordinates (longitude, latitude).

MTN25_ETRS89_Peninsula_Baleares_Canarias

MTN25 real grid corresponding to the Peninsula, the Balearic Islands and the Canary Islands, adjusted to the new ETRS89 official reference geodetic system, in geographical coordinates (longitude, latitude).

MTN50_ETRS89_Peninsula_Baleares_Canarias

MTN50 real grid corresponding to the Peninsula, the Balearic Islands and the Canary Islands, adjusted to the new ETRS89 official reference geodetic system, in geographical coordinates (longitude, latitude).

MTN25_RegCan95_Canarias

MTN25 grid corresponding to the Canary Islands, in REGCAN95 (WGS84 compatible) and geographic coordinates (longitude, latitude). It is the real MTN25 grid, that is, the one that divides the current printed series of the map, taking into account the special distribution of the Canary Islands sheets.

MTN50_RegCan95_Canarias

MTN50 grid corresponding to the Canary Islands, in REGCAN95 (WGS84 compatible) and geographic coordinates (longitude, latitude). This is the real grid of the MTN50, that is, the one that divides the current printed series of the map, taking into account the special distribution of the Canary Islands sheets.

About caching

You can set your cache_dir with esp_set_cache_dir().

Sometimes cached files may be corrupt. On that case, try re-downloading the data setting update_cache = TRUE.

If you experience any problem on download, try to download the corresponding .geojson file by any other method and save it on your cache_dir. Use the option verbose = TRUE for debugging the API query.

Examples

# \donttest{
grid <- esp_get_grid_MTN(grid = "MTN50_ETRS89_Peninsula_Baleares_Canarias")

library(ggplot2)

ggplot(grid) +
  geom_sf() +
  theme_light() +
  labs(title = "MTN50 Grid for Spain")

# }