| st_central_point | Spatial centrality | 
| st_central_point.sf | Spatial centrality | 
| st_central_point.sfc | Spatial centrality | 
| st_central_point.sfg | Spatial centrality | 
| st_sd_box | Standard deviation box calculator in 2D or 3D | 
| st_sd_box.sf | Standard deviation box calculator in 2D or 3D | 
| st_sd_box.sfc | Standard deviation box calculator in 2D or 3D | 
| st_sd_box.sfg | Standard deviation box calculator in 2D or 3D | 
| st_sd_distance | Standard deviation distance calculator | 
| st_sd_distance.sf | Standard deviation distance calculator | 
| st_sd_distance.sfc | Standard deviation distance calculator | 
| st_sd_distance.sfg | Standard deviation distance calculator | 
| st_sd_ellipse | Standard deviation ellipse calculator | 
| st_sd_ellipse.sf | Standard deviation ellipse calculator | 
| st_sd_ellipse.sfc | Standard deviation ellipse calculator | 
| st_sd_ellipse.sfg | Standard deviation ellipse calculator |