diff --git a/NAMESPACE b/NAMESPACE
index c0fb48f..cfbc050 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -10,5 +10,6 @@ export(st_extract_disconnected)
 export(st_extract_intersections)
 export(st_merge_spatialunits)
 export(st_nest_coordinates)
+export(st_orientation)
 export(st_survey_spatialunits)
 export(st_unnest_coordinates)
diff --git a/man/st_orientation.Rd b/man/st_orientation.Rd
new file mode 100644
index 0000000..b60e442
--- /dev/null
+++ b/man/st_orientation.Rd
@@ -0,0 +1,18 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/st_orientation.R
+\name{st_orientation}
+\alias{st_orientation}
+\title{Determine the interior angle between a \code{LINESTRING} and the horizontal.}
+\usage{
+st_orientation(x)
+}
+\arguments{
+\item{x}{a \code{sf} object containing \code{LINESTRING} geometries.}
+}
+\value{
+An unnested \code{sf} object containing the orientation of each line
+segment making up the original \code{LINESTRING} geometries.
+}
+\description{
+Determine the interior angle between a \code{LINESTRING} and the horizontal.
+}