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Coordinate Tables

Source: R/coords_t.R
coords_t.Rd

Create and validate coords_t objects, describing the base set of coordinate points upon which your land use model is intended to run. Because the coordinates are declared as points, you can describe sparse domains (e.g. following polity boundaries) or with arbitrary distribution (e.g. square, hexagonal, voronoi, polygon tesselations).

Usage

as_coords_t(x)

# S3 method for class 'coords_t'
print(x, nrow = 10, ...)

create_coords_t_square(epsg, extent, resolution, ...)

Arguments

x

A table that can be coerced to a valid coords_t object.

nrow

see data.table::print.data.table

...

passed to data.table::print.data.table

epsg

An integerish scalar representing an EPSG CRS code

extent

A terra::SpatExtent object describing the extent of a desired coords_t

resolution

A numeric scalar, describing the required resolution of your coords_t object. The unit is that of the epsg.

Value

A data.table of class "coords_t" with columns:

  • id_coord: Unique ID for each coordinate pair

  • lon: Longitude/x coordinate

  • lat: Latitude/y coordinate

  • elevation: Elevation (initially NULL)

  • geom_polygon: Geometry polygon object (for grid cells)

Methods (by generic)

  • print(coords_t): Print a coords_t object, passing params to data.table print

Functions

  • as_coords_t(): Cast and validate as coords_t

  • create_coords_t_square(): Create a set of square coordinates