Converts a data frame of GPS fishing observations to a projected `sf` POINT object. Rows with missing coordinates are dropped. The result is in a metric CRS suitable for distance-based operations such as grid creation and spatial joins.
Arguments
- df
A data frame containing GPS fishing point records.
- lat_col
Character. Name of the latitude column. Default is `"lat"`.
- lon_col
Character. Name of the longitude column. Default is `"lon"`.
- crs_projected
Integer. EPSG code of the target projected CRS. Default is `32632` (UTM zone 32N). Choose a zone that covers your study area for accurate metric distances.