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Create an irregular sampling domain polygon

Source: R/domain.R
create_sampling_domain.Rd

Generates a single, closed, irregular polygon intended to represent a realistic, non-rectangular study area for spatial simulation. The polygon outline is derived from a parameterized radius-angle curve with added sinusoidal perturbations and random noise to produce an "organic" shape.

The output is returned as an sf object containing one polygon in its geometry column. This can be used directly in plotting or as the spatial domain within which individuals, quadrats, or transects are placed.

Usage

create_sampling_domain()

Value

An sf object with one row and a POLYGON geometry.

Details

The shape is generated in polar coordinates \((r, \theta)\) using:

  • a base radius of 10 units,

  • sinusoidal radial modulations with periods of 3 and 5 cycles per revolution,

  • independent uniform noise on both radius and Cartesian coordinates to break symmetry,

  • vertical compression by a factor of 0.8 to induce aspect variation.

The 20 vertices are connected in sequence and closed by repeating the first point. The result is wrapped in sf::st_polygon() and returned as a single-row sf object.

See also

st_polygon, st_sf

Examples

if (FALSE) { # \dontrun{
domain <- create_sampling_domain()
plot(domain$geometry)
} # }