ices_geom: Get ICES geometries

In csquares: Concise Spatial Query and Representation System (c-Squares)

Get ICES geometries

Description

Functions to convert ICES rectangles

Usage

ices_centroids(ices_rect)

ices_rectangles(ices_rect)

ices_to_csquares(ices_rect)

ices_from_csquares(csquares)

Arguments

ices_rect	A character vector containing valid ICES rectangle codes
csquares	A csquares object, or an object that can be coerced with as_csquares().

Value

In case of ices_centroids a sf::st_sf() object is returned, with POINT geometries representing the centroids of the ICES rectangles.

In case of ices_rectangles a sf::st_sf() object is returned, with POLYGON geometries representing the outline of the ICES rectangles.

In case of ices_to_csquares a csquares object inheriting from sf::st_sf() is returned, the csquares code should represent the ICES rectangles.

In case of ices_from_csquares a character vector is returned with ICES rectangle codes that correspond with the csquares. The method is fast yet crude: it only checks in which ICES rectangles the centroids of the csquares are located. It does not check if the resolution matches. NA values are returned when csquares are situated outside the area covered by ICES rectangles.

Author(s)

Pepijn de Vries

Examples

ices_rects <-
  c("31F21", "31F22", "31F23", "31F24", "31F25", "31F26", "31F27", "31F28", "31F29",
    "32F2", "33F2", "34F2", "35F2",
    "31F3", "32F3", "33F3", "34F3", "35F3",
    "31F4", "32F4", "33F4", "34F4", "35F4")
ices_centroids(ices_rects)
ices_rectangles(ices_rects)
ices_csq <- ices_to_csquares(ices_rects)
ices_from_csquares(ices_csq)

csquares documentation built on Sept. 11, 2024, 7:21 p.m.