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geocrystal · Apr 11, 2024 · cf1028b · cf1028b
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diff --git a/README.md b/README.md
@@ -37,7 +37,7 @@ coordinates = [
 RingArea.ring_area(coordinates)
 # => 7748891609977.456
 ```
-Accepts an `Array(Array(Number))` of Ring Coordinates.
+Accepts an `Array(Array(Number))` of Ring Coordinates as `[[longitude1, latitude1], [longitude2, latitude2], ...]`.
 
 Returns the approximate signed geodesic area of the polygon in square meters.
 

diff --git a/src/ring_area.cr b/src/ring_area.cr
@@ -20,7 +20,7 @@ module RingArea
   # JPL Publication 07-03, Jet Propulsion
   # Laboratory, Pasadena, CA, June 2007 https://trs.jpl.nasa.gov/handle/2014/40409
   #
-  # `coords` - Ring Coordinates as [[longitude, latitude], ...]
+  # `coords` - Ring Coordinates as `[[longitude1, latitude1], [longitude2, latitude2], ...]`
   #
   # Return the approximate signed geodesic area of the polygon in square meters.
   #