diff --git a/elevation.go b/elevation.go
index 834c46c..aaf4265 100644
--- a/elevation.go
+++ b/elevation.go
@@ -5,6 +5,9 @@ import (
 	"net/url"
 )
 
+// Elevation requests elevation data for a series of locations.
+//
+// See https://developers.google.com/maps/documentation/elevation/
 func (c Client) Elevation(ll []LatLng) ([]ElevationResult, error) {
 	var r elevationResponse
 	if err := c.doDecode(baseURL+elevation(ll), &r); err != nil {
@@ -16,6 +19,9 @@ func (c Client) Elevation(ll []LatLng) ([]ElevationResult, error) {
 	return r.Results, nil
 }
 
+// ElevationPolyline requests elevation data for a series of locations as specified as an encoded polyline.
+//
+// See https://developers.google.com/maps/documentation/elevation/#Locations
 func (c Client) ElevationPolyline(p string) ([]ElevationResult, error) {
 	var r elevationResponse
 	if err := c.doDecode(baseURL+elevationpoly(p), &r); err != nil {
@@ -27,6 +33,7 @@ func (c Client) ElevationPolyline(p string) ([]ElevationResult, error) {
 	return r.Results, nil
 }
 
+// ElevationPath requests elevation data for a number of samples along a path described as a series of locations.
 func (c Client) ElevationPath(ll []LatLng, samples int) ([]ElevationResult, error) {
 	var r elevationResponse
 	if err := c.doDecode(baseURL+elevationpath(ll, samples), &r); err != nil {
@@ -38,6 +45,7 @@ func (c Client) ElevationPath(ll []LatLng, samples int) ([]ElevationResult, erro
 	return r.Results, nil
 }
 
+// ElevationPathPoly requests elevation data for a number of samples along a path described as a series of locations specified as an encoded polyline.
 func (c Client) ElevationPathPoly(p string, samples int) ([]ElevationResult, error) {
 	var r elevationResponse
 	if err := c.doDecode(baseURL+elevationpathpoly(p, samples), &r); err != nil {
@@ -79,8 +87,19 @@ type elevationResponse struct {
 	Results []ElevationResult `json:"results"`
 	Status  string            `json:"status"`
 }
+
+// ElevationResult describes elevation data.
 type ElevationResult struct {
-	Elevation  float64 `json:"elevation"`
-	Location   LatLng  `json:"location"`
+	// Elevation is elevation of the location in meters.
+	Elevation float64 `json:"elevation"`
+
+	// Location is the location of the location being described.
+	Location LatLng `json:"location"`
+
+	// Resolution is the maximum distance between data points from which the elevation was interpolated, in meters.
+	//
+	// This property will be zero if the resolution is not known. Note that elevation data becomes
+	// more coarse (larger Resolution values) when multiple points are passed. To obtain the most
+	// accurate elevation value for a point, it should be queried independently.
 	Resolution float64 `json:"resolution"`
 }