diff --git a/src/resolvers-cassandra/Tiles/queries.js b/src/resolvers-cassandra/Tiles/queries.js
index 275ef3d..79d310a 100644
--- a/src/resolvers-cassandra/Tiles/queries.js
+++ b/src/resolvers-cassandra/Tiles/queries.js
@@ -1,26 +1,11 @@
 'use strict';
 
 const Promise = require('promise');
+const geotile = require('geotile');
 const cassandraConnector = require('../../clients/cassandra/CassandraConnector');
 const featureServiceClient = require('../../clients/locations/FeatureServiceClient');
 const withRunTime = require('../shared').withRunTime;
-const geotile = require('geotile');
-
-function makeMap(iterable, keyFunc, valueFunc) {
-  const map = {};
-  iterable.forEach(item => {
-    const key = keyFunc(item);
-    const value = valueFunc(item);
-    map[key] = value;
-  });
-  return map;
-}
-
-function makeSet(iterable, func) {
-  const set = new Set();
-  iterable.forEach(item => set.add(func(item)));
-  return set;
-}
+const { makeMap, makeSet } = require('../../utils/collections');
 
 function makeDefaultFilters(args) {
   let params = [];
diff --git a/src/utils/collections.js b/src/utils/collections.js
new file mode 100644
index 0000000..f07e44e
--- /dev/null
+++ b/src/utils/collections.js
@@ -0,0 +1,20 @@
+function makeMap(iterable, keyFunc, valueFunc) {
+  const map = {};
+  iterable.forEach(item => {
+    const key = keyFunc(item);
+    const value = valueFunc(item);
+    map[key] = value;
+  });
+  return map;
+}
+
+function makeSet(iterable, func) {
+  const set = new Set();
+  iterable.forEach(item => set.add(func(item)));
+  return set;
+}
+
+module.exports = {
+  makeMap: makeMap,
+  makeSet: makeSet
+};