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Read in shapefiles provided by this package

Source: R/read_shp.R
read_shp.Rd

This function uses the sf package to read one of the included shapefiles bundled with the package. Jessie has standardized these.

Usage

read_shp(shape = c("usa", "eez", "contshelf50", "contshelf200", "mpas"))

Source

The shapefiles are stored in /extdata.

Available shapefiles:

  • usa: usa_contiguous.shp

  • eez: westcoast_eez.shp. Derived from 'Marine Regions' dataset: https://www.marineregions.org/

  • contshelf50: cont_shelf_50m.shp. Derived from GEBCO 2024

  • contshelf200: cont_shelf_200m.shp. Derived from GEBCO 2024.

  • mpas: california_mpas.shp. From CDFW dataset: 'California Marine Protected Areas ds582', representing all MPAs as of 1 Jan, 2019.

Arguments

shape

One of the default shapefiles to use. Options are:

  • "usa" – The contiguous United States land boundary.

  • "eez" – The U.S. West Coast EEZ

  • "contshelf50" – The 50 m isobath

  • "contshelf200" – The 200m isobath (i.e., the continental shelf)

  • "mpas" – Californian marine protected areas

Value

An sf object of the chosen shapefile

Examples

shp <- read_shp("usa")
shp
#> Simple feature collection with 1 feature and 1 field
#> Geometry type: MULTIPOLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -124.7346 ymin: 24.54255 xmax: -66.97732 ymax: 49.36949
#> Geodetic CRS:  WGS 84
#>   FID                       geometry
#> 1   0 MULTIPOLYGON (((-122.7411 4...
plot(shp)