List available map projections

Returns the list of available map projections registered in planisphere. Projections are organized into thematic families to facilitate exploration and selection.

By default, all projections are returned as a single sorted character vector. Alternatively, a specific family of projections can be requested.

Usage

registry(type = NULL)

Arguments

type

Character. Optional projection family. Must be one of: "cylindrical", "conic", "azimuthal", "perspective", "pseudocylindrical", "interrupted", "polyhedral", "quincuncial", "regional", "pseudoazimuthal", "miscellaneous".

Value

A sorted unique character vector of projection names. If `type` is provided, only projections belonging to the selected family are returned.

Examples

# List all available projections

# List cylindrical projections
registry(type = "cylindrical")
#> [1] "CylindricalEqualArea"     "CylindricalStereographic"
#> [3] "Equirectangular"          "Mercator"                
#> [5] "Miller"                   "TransverseMercator"      

# Explore regional projections
registry("regional")
#>  [1] "ChamberlinAfrica"            "ModifiedStereographicAlaska"
#>  [3] "ModifiedStereographicGs48"   "ModifiedStereographicGs50"  
#>  [5] "ModifiedStereographicLee"    "ModifiedStereographicMiller"
#>  [7] "Patterson"                   "Robinson"                   
#>  [9] "TwoPointAzimuthalUsa"        "TwoPointEquidistantUsa"     
#> [11] "Winkel3"                    

# Visualize polyhedral projections
gallery(projections = registry("polyhedral"), verbose = FALSE)