diff --git a/src/backend/data/schema.js b/src/backend/data/schema.js
index 7003c46f..e156650d 100644
--- a/src/backend/data/schema.js
+++ b/src/backend/data/schema.js
@@ -456,6 +456,14 @@ const GraphQLListContainer = new GraphQLObjectType({
   interfaces: [nodeInterface]
 })
 
+const GeoPoint = new GraphQLInputObjectType({
+  name: 'GeoPoint',
+  fields: {
+    lat: {type: GraphQLFloat},
+    lon: {type: GraphQLFloat},
+  }
+})
+
 const GraphQLUser = new GraphQLObjectType({
   name: 'User',
   description: 'User of ground control',
@@ -554,10 +562,13 @@ const GraphQLUser = new GraphQLObjectType({
     intervieweeForCallAssignment: {
       type: GraphQLPerson,
       args: {
-        callAssignmentId: {type: GraphQLString}
+        callAssignmentId: {type: GraphQLString},
+        center: {type: GeoPoint},
+        radiusMeters: {type: GraphQLFloat}
       },
-      resolve: async(user, {callAssignmentId}, {rootValue}) => {
-
+      resolve: async(
+        user, {callAssignmentId, center, radiusMeters}, {rootValue}
+      ) => {
         let localCallAssignmentId = fromGlobalId(callAssignmentId)
         if (localCallAssignmentId.type !== 'CallAssignment')
           localCallAssignmentId = callAssignmentId
@@ -647,6 +658,21 @@ const GraphQLUser = new GraphQLObjectType({
         if (userAddress)
           query = query.whereNot('bsd_people.cons_id', userAddress.cons_id)
 
+        // Filter by distance from a geographical point.
+        // Spatial ref 4326 is WGS 84, in degrees
+        // Spatial ref 900913 is Google Web Mercator, in meters
+        if (center && radiusMeters > 0) {
+          query = query.whereRaw(`
+            ST_DWithin(bsd_addresses.geom,
+              ST_Transform(
+                ST_SetSRID(ST_MakePoint(${center.lon}, ${center.lat}), 4326),
+                900913
+              ),
+              ${radiusMeters}
+            )
+          `)
+        }
+
         log.info(`Running query: ${query}`)
 
         let person    = await query
@@ -783,9 +809,10 @@ const GraphQLPerson = new GraphQLObjectType({
       type: new GraphQLList(GraphQLEvent),
       args: {
         within: {type: GraphQLInt},
-        type: {type: GraphQLString}
+        type: {type: GraphQLString},
+        officialOnly: {type: GraphQLBoolean}
       },
-      resolve: async(person, {within, type}, {rootValue}) => {
+      resolve: async(person, {within, type, officialOnly}, {rootValue}) => {
         let address          = await getPrimaryAddress(person);
         let boundingDistance = within / 69
         let eventTypes       = null
@@ -801,6 +828,10 @@ const GraphQLPerson = new GraphQLObjectType({
           .where('flag_approval', false)
           .whereNot('is_searchable', 0)
 
+        if (officialOnly) {
+          query = query.where('is_official', true)
+        }
+
         if (eventTypes)
           query = query.whereIn('event_type_id', eventTypes.map((type) => type.event_type_id))
 
diff --git a/src/frontend/components/CallAssignment.js b/src/frontend/components/CallAssignment.js
index 3ebc24a9..45524011 100644
--- a/src/frontend/components/CallAssignment.js
+++ b/src/frontend/components/CallAssignment.js
@@ -12,6 +12,8 @@ import SubmitCallSurvey from '../mutations/SubmitCallSurvey'
 import CallStatsBar from './CallStatsBar'
 import MutationHandler from './MutationHandler'
 import {PhoneNumberFormat, PhoneNumberUtil} from 'google-libphonenumber'
+import qs from 'qs'
+import convertType from '../helpers/convertType'
 const phoneUtil = PhoneNumberUtil.getInstance()
 
 const SurveyRenderers = {
@@ -408,8 +410,18 @@ ${userFirstName}`
   }
 }
 
+// Convert the query parameters 'lat', 'lon', and 'miles' into API arguments
+// for the center and radius of the filter region.
+const {lat, lon, miles} = convertType(qs.parse(location.search.substr(1)))
+const center = isFinite(lat) && isFinite(lon) ? {lat: lat, lon: lon} : null
+const radiusMeters = isFinite(miles) ? miles * 1609.34 : null
+
 export default Relay.createContainer(CallAssignment, {
-  initialVariables: { id: '' },
+  initialVariables: {
+    id: '',
+    center: center,
+    radiusMeters: radiusMeters
+  },
   fragments: {
     callAssignment: () => Relay.QL`
       fragment on CallAssignment {
@@ -428,9 +440,11 @@ export default Relay.createContainer(CallAssignment, {
       fragment on User {
         id
         firstName
-        allCallsMade:callsMade(forAssignmentId:$id)
-        completedCallsMade:callsMade(forAssignmentId:$id,completed:true)
-        intervieweeForCallAssignment(callAssignmentId:$id) {
+        allCallsMade: callsMade(forAssignmentId: $id)
+        completedCallsMade: callsMade(forAssignmentId: $id, completed: true)
+        intervieweeForCallAssignment(
+          callAssignmentId: $id, center: $center, radiusMeters: $radiusMeters
+        ) {
           id
           prefix
           firstName
diff --git a/src/frontend/components/survey-renderers/PhonebankRSVPSurvey.js b/src/frontend/components/survey-renderers/PhonebankRSVPSurvey.js
index 71f314c9..da8ce413 100644
--- a/src/frontend/components/survey-renderers/PhonebankRSVPSurvey.js
+++ b/src/frontend/components/survey-renderers/PhonebankRSVPSurvey.js
@@ -9,6 +9,8 @@ import FontIcon from 'material-ui/lib/font-icon'
 import SideBarLayout from '../SideBarLayout'
 import GCSelectField from '../forms/GCSelectField'
 import GCBooleanField from '../forms/GCBooleanField'
+import qs from 'qs'
+import convertType from '../../helpers/convertType'
 
 const WEEKDAY_DATE_FORMAT = 'dddd, MMMM Do'
 
@@ -544,9 +546,14 @@ class PhonebankRSVPSurvey extends React.Component {
   }
 }
 
+// Convert the query parameter 'official' into a boolean flag.
+const {official} = convertType(qs.parse(location.search.substr(1)))
+const officialOnly = official ? true : false
+
 export default Relay.createContainer(PhonebankRSVPSurvey, {
   initialVariables: {
-    type: 'phonebank'
+    type: 'phonebank',
+    officialOnly: officialOnly
   },
   fragments: {
     currentUser: () => Relay.QL`
@@ -562,7 +569,7 @@ export default Relay.createContainer(PhonebankRSVPSurvey, {
           latitude
           longitude
         }
-        nearbyEvents(within:20, type:$type) {
+        nearbyEvents(within:20, type:$type, officialOnly:$officialOnly) {
           id
           eventIdObfuscated
           name