\BeginKnitrBlock{rmdnote}<div class="rmdnote">The three main functions for transformation of simple features coordinates are `sf::st_transform()`, `sf::sf_project()`, and `lwgeom::st_transform_proj()`.
The `st_transform` function uses the GDAL interface to PROJ, while `sf_project()` (which works with two-column numeric matrices, representing points) and `lwgeom::st_transform_proj()` use the PROJ API directly.
The first one is appropriate for most situations, and provides a set of the most often used parameters and well-defined transformations.
The next one allows for greater customization of a projection, which includes cases when some of the PROJ parameters (e.g., `+over`) or projection (`+proj=wintri`) is not available in `st_transform()`.</div>\EndKnitrBlock{rmdnote}