state_plane: Projections from the State Plane Coordinate System

In USAboundaries: Historical and Contemporary Boundaries of the United States of America

Description

Get EPSG codes or PROJ.4 codes for projections from the State Plane Coordinate System.

Usage

state_plane(state, plane_id = NULL, type = c("epsg", "proj4"))

Arguments

state	The postal code for the state.
plane_id	The state plane geographic zone identifier. A NULL value will return a projection for the entire state.
type	The type of output to return: either an EPSG code or PROJ4 string.

Value

Either a PROJ4 string as a character vector or an EPSG code as an integer.

See Also

For documentation of the underlying State Plane Coordinate System projection data frame, see state_proj.

Examples

if (require(USAboundariesData)) {
  state_plane(state = "MA", type = "epsg")
  state_plane(state = "MA", type = "proj4")
  state_plane(state = "MA", plane_id = "island", type = "epsg")
  state_plane(state = "MA", plane_id = "island", type = "proj4")

  # Show the difference made by a state plane projection
  if (require(sf)) {
    va <- us_states(states = "VA", resolution = "high")
    plot(st_geometry(va), graticule = TRUE)
    va <- st_transform(va, state_plane("VA"))
    plot(st_geometry(va), graticule = TRUE)
  }
}

USAboundaries documentation built on Oct. 12, 2021, 5:07 p.m.