Perform post-processing steps on site polygons.

Perform post-processing steps on site polygons for a reef. Post- processing applies to multipolygons (sites made up of smaller non-continuous polygons) only. This process involves identifying the largest single polygon and removing any polygons that are outside a user-defined distance threshold from the largest polygon. Post-processing also involves removing any site polygons that are too small, based on a user defined minimum site area.

Usage

site_postprocessing(
  reef_site_polygons,
  min_site_area = 50 * 307,
  max_distance = 100
)

Arguments

reef_site_polygons

data.frame. Contains a row for each unique site, for a target reef of interest.

min_site_area

numeric. Minimum threshold for removing sites that are too small in their total site area. This value should be smaller than the site_area used in other parts of the workflow as it is intended as an absolute minimum threshold. Must be in the same units returned by sf::st_area(). Default value = 50 * 307, where 307 is the area (in m^2) of a H3 cell with resolution of 12 and 50 is the minimum number of hexagons per site.

Value

data.frame containing all site polygons for the target reef after post- processing has taken place on undersized or multipolygon sites.