From c0fb852d419e380845524bb167b71d83fac5cd9f Mon Sep 17 00:00:00 2001
From: pietervdvn <pietervdvn@posteo.net>
Date: Sun, 18 Apr 2021 18:23:59 +0200
Subject: [PATCH] Fix length, update docs

---
 Docs/CalculatedTags.md | 4 ++++
 Logic/GeoOperations.ts | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Docs/CalculatedTags.md b/Docs/CalculatedTags.md
index 3393737..38fa2f7 100644
--- a/Docs/CalculatedTags.md
+++ b/Docs/CalculatedTags.md
@@ -11,6 +11,10 @@ The latitude and longitude of the point (or centerpoint in the case of a way/are
 
 The surface area of the feature, in square meters and in hectare. Not set on points and ways
 
+### \_length, \_length:km
+
+The total length of a feature in meters (and in kilometers, rounded to one decimal for '\_length:km'). For a surface, the length of the perimeter
+
 ### \_country
 
 The country code of the property (with latlon2country)
diff --git a/Logic/GeoOperations.ts b/Logic/GeoOperations.ts
index 6697fb4..43dd45a 100644
--- a/Logic/GeoOperations.ts
+++ b/Logic/GeoOperations.ts
@@ -15,7 +15,8 @@ export class GeoOperations {
         return newFeature;
     }
     
-    static centerpointCoordinates(feature: any){
+    static centerpointCoordinates(feature: any): [number, number]{
+        // @ts-ignore
         return turf.center(feature).geometry.coordinates;
     }