From 02a03e5a611b7e43293d3f7f0d327b55422b448c Mon Sep 17 00:00:00 2001
From: Nils Schneider <nils@nilsschneider.net>
Date: Tue, 7 Jul 2015 21:28:44 +0200
Subject: [PATCH] map: work with no or little nodes

---
 lib/map.js             | 6 ++++++
 lib/map/labelslayer.js | 9 ++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/map.js b/lib/map.js
index 0371797..8e7bcc8 100644
--- a/lib/map.js
+++ b/lib/map.js
@@ -327,6 +327,12 @@ define(["map/clientlayer", "map/labelslayer",
         var barycenter = L.latLng(d3.median(lats), d3.median(lngs))
         var barycenterDev = [d3.deviation(lats), d3.deviation(lngs)]
 
+        if (barycenterDev[0] === undefined)
+          barycenterDev[0] = 0
+
+        if (barycenterDev[1] === undefined)
+          barycenterDev[1] = 0
+
         var barycenterCircle = L.latLng(barycenter.lat + barycenterDev[0],
                                         barycenter.lng + barycenterDev[1])
 
diff --git a/lib/map/labelslayer.js b/lib/map/labelslayer.js
index 9134184..7bd2cb9 100644
--- a/lib/map/labelslayer.js
+++ b/lib/map/labelslayer.js
@@ -155,9 +155,12 @@ define(["leaflet", "rbush"],
             return undefined
         }).filter(function (d) { return d !== undefined })
 
-        this.margin = 16 + labels.map(function (d) {
-          return d.width
-        }).sort().reverse()[0]
+        this.margin = 16
+
+        if (labels.length > 0)
+          this.margin += labels.map(function (d) {
+            return d.width
+          }).sort().reverse()[0]
 
         this.labels = rbush(9)
         this.labels.load(labels.map(mapRTree))