stop slicing data arrays in scattergeo

Author: alexcjohnson

src/traces/scattergeo/calc.js

@@ -20,7 +20,7 @@ var _ = require('../../lib')._;
 
 module.exports = function calc(gd, trace) {
     var hasLocationData = Array.isArray(trace.locations);
-    var len = hasLocationData ? trace.locations.length : trace.lon.length;
+    var len = hasLocationData ? trace.locations.length : trace._length;
     var calcTrace = new Array(len);
 
     for(var i = 0; i < len; i++) {

src/traces/scattergeo/defaults.js

@@ -69,9 +69,7 @@ function handleLonLatLocDefaults(traceIn, traceOut, coerce) {
     lon = coerce('lon') || [];
     lat = coerce('lat') || [];
     len = Math.min(lon.length, lat.length);
-
-    if(len < lon.length) traceOut.lon = lon.slice(0, len);
-    if(len < lat.length) traceOut.lat = lat.slice(0, len);
+    traceOut._length = len;
 
     return len;
 }

test/image/mocks/geo_first.json

@@ -9,7 +9,8 @@
         {
             "type": "choropleth",
             "locations": ["USA", "CAN", "RUS"],
-            "z": [0, 5, 10]
+            "z": [0, 5, 10],
+            "autocolorscale": true
         }
     ],
     "layout": {