Tilemap refactor

src/kibana/components/config/defaults.js

@@ -57,8 +57,10 @@ define(function (require) {
       description: 'Never show more than this many bar in date histograms, scale values if needed',
     },
     'visualization:tileMap:maxPrecision': {
-      value: 6,
-      description: 'The maximum geoHash size allowed in a tile map',
+      value: 7,
+      description: 'The maximum geoHash precision displayed on tile maps: 7 is high, 10 is very high, ' +
+      '12 is the max. Explanation of cell dimensions: http://www.elastic.co/guide/en/elasticsearch/reference/current/' +
+      'search-aggregations-bucket-geohashgrid-aggregation.html#_cell_dimensions_at_the_equator',
     },
     'csv:separator': {
       value: ',',