diff --git a/x-pack/legacy/plugins/maps/common/descriptor_types.d.ts b/x-pack/legacy/plugins/maps/common/descriptor_types.d.ts
index fdb19b8f16564d..d7849d09a21f7e 100644
--- a/x-pack/legacy/plugins/maps/common/descriptor_types.d.ts
+++ b/x-pack/legacy/plugins/maps/common/descriptor_types.d.ts
@@ -89,18 +89,6 @@ export type XYZTMSSourceDescriptor = {
   urlTemplate: string;
 };
 
-export type SourceDescriptor =
-  | EMSTMSSourceDescriptor
-  | EMSFileSourceDescriptor
-  | ESGeoGridSourceDescriptor
-  | ESSearchSourceDescriptor
-  | ESPewPewSourceDescriptor
-  | ESTermSourceDescriptor
-  | KibanaRegionmapSourceDescriptor
-  | KibanaTilemapSourceDescriptor
-  | WMSSourceDescriptor
-  | XYZTMSSourceDescriptor;
-
 export type JoinDescriptor = {
   leftField: string;
   right: ESTermSourceDescriptor;
@@ -115,7 +103,7 @@ export type LayerDescriptor = {
   label?: string;
   minZoom?: number;
   maxZoom?: number;
-  sourceDescriptor: SourceDescriptor;
+  sourceDescriptor: AbstractSourceDescriptor;
   type?: string;
   visible?: boolean;
 };
diff --git a/x-pack/legacy/plugins/maps/common/map_saved_object_types.d.ts b/x-pack/legacy/plugins/maps/common/map_saved_object_types.d.ts
deleted file mode 100644
index aa94088c0a54b0..00000000000000
--- a/x-pack/legacy/plugins/maps/common/map_saved_object_types.d.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-/* eslint-disable @typescript-eslint/consistent-type-definitions */
-
-export type MapSavedObjectAttributes = {
-  title?: string;
-  description?: string;
-  mapStateJSON?: string;
-  layerListJSON?: string;
-  uiStateJSON?: string;
-  bounds?: {
-    type?: string;
-    coordinates?: [];
-  };
-};
-
-export type MapSavedObject = {
-  [key: string]: any;
-  title: string;
-  id?: string;
-  type?: string;
-  attributes?: MapSavedObjectAttributes;
-};
diff --git a/x-pack/legacy/plugins/maps/common/migrations/scaling_type.ts b/x-pack/legacy/plugins/maps/common/migrations/scaling_type.ts
index 561e0a8f65d266..fc71970e53cb2f 100644
--- a/x-pack/legacy/plugins/maps/common/migrations/scaling_type.ts
+++ b/x-pack/legacy/plugins/maps/common/migrations/scaling_type.ts
@@ -6,15 +6,18 @@
 
 import _ from 'lodash';
 import { ES_SEARCH, SCALING_TYPES } from '../constants';
-import { LayerDescriptor } from '../descriptor_types';
-import { MapSavedObject } from '../map_saved_object_types';
+import { LayerDescriptor, ESSearchSourceDescriptor } from '../descriptor_types';
 
 function isEsDocumentSource(layerDescriptor: LayerDescriptor) {
   const sourceType = _.get(layerDescriptor, 'sourceDescriptor.type');
   return sourceType === ES_SEARCH;
 }
 
-export function migrateUseTopHitsToScalingType({ attributes }: Partial<MapSavedObject>) {
+export function migrateUseTopHitsToScalingType({
+  attributes,
+}: {
+  attributes: { layerListJSON?: string; title?: string };
+}) {
   if (!attributes || !attributes.layerListJSON) {
     return attributes;
   }
@@ -23,17 +26,13 @@ export function migrateUseTopHitsToScalingType({ attributes }: Partial<MapSavedO
   layerList.forEach((layerDescriptor: LayerDescriptor) => {
     if (isEsDocumentSource(layerDescriptor)) {
       if (_.has(layerDescriptor, 'sourceDescriptor.useTopHits')) {
-        // @ts-ignore TS is too stupid to figure out that scalingType is available on sourceDescriptor
-        layerDescriptor.sourceDescriptor.scalingType = _.get(
-          layerDescriptor,
-          'sourceDescriptor.useTopHits',
-          false
-        )
+        const sourceDescriptor = layerDescriptor.sourceDescriptor as ESSearchSourceDescriptor;
+        sourceDescriptor.scalingType = _.get(layerDescriptor, 'sourceDescriptor.useTopHits', false)
           ? SCALING_TYPES.TOP_HITS
           : SCALING_TYPES.LIMIT;
         // @ts-ignore useTopHits no longer in type definition but that does not mean its not in live data
         // hence the entire point of this method
-        delete layerDescriptor.sourceDescriptor.useTopHits;
+        delete sourceDescriptor.useTopHits;
       }
     }
   });
diff --git a/x-pack/legacy/plugins/maps/server/maps_telemetry/maps_telemetry.ts b/x-pack/legacy/plugins/maps/server/maps_telemetry/maps_telemetry.ts
index 821abb953ed85d..3ce46e2955f50c 100644
--- a/x-pack/legacy/plugins/maps/server/maps_telemetry/maps_telemetry.ts
+++ b/x-pack/legacy/plugins/maps/server/maps_telemetry/maps_telemetry.ts
@@ -19,7 +19,6 @@ import {
   // @ts-ignore
 } from '../../common/constants';
 import { LayerDescriptor } from '../../common/descriptor_types';
-import { MapSavedObject } from '../../common/map_saved_object_types';
 
 interface IStats {
   [key: string]: {
@@ -33,6 +32,33 @@ interface ILayerTypeCount {
   [key: string]: number;
 }
 
+interface IMapSavedObject {
+  [key: string]: any;
+  fields: IFieldType[];
+  title: string;
+  id?: string;
+  type?: string;
+  timeFieldName?: string;
+  fieldFormatMap?: Record<
+    string,
+    {
+      id: string;
+      params: unknown;
+    }
+  >;
+  attributes?: {
+    title?: string;
+    description?: string;
+    mapStateJSON?: string;
+    layerListJSON?: string;
+    uiStateJSON?: string;
+    bounds?: {
+      type?: string;
+      coordinates?: [];
+    };
+  };
+}
+
 function getUniqueLayerCounts(layerCountsList: ILayerTypeCount[], mapsCount: number) {
   const uniqueLayerTypes = _.uniq(_.flatten(layerCountsList.map(lTypes => Object.keys(lTypes))));
 
@@ -76,7 +102,7 @@ export function buildMapsTelemetry({
   indexPatternSavedObjects,
   settings,
 }: {
-  mapSavedObjects: MapSavedObject[];
+  mapSavedObjects: IMapSavedObject[];
   indexPatternSavedObjects: IIndexPattern[];
   settings: SavedObjectAttribute;
 }): SavedObjectAttributes {
@@ -88,7 +114,6 @@ export function buildMapsTelemetry({
   const mapsCount = layerLists.length;
 
   const dataSourcesCount = layerLists.map(lList => {
-    // @ts-ignore
     const sourceIdList = lList.map((layer: LayerDescriptor) => layer.sourceDescriptor.id);
     return _.uniq(sourceIdList).length;
   });
@@ -158,7 +183,7 @@ export async function getMapsTelemetry(
   savedObjectsClient: SavedObjectsClientContract,
   config: Function
 ) {
-  const mapSavedObjects: MapSavedObject[] = await getMapSavedObjects(savedObjectsClient);
+  const mapSavedObjects: IMapSavedObject[] = await getMapSavedObjects(savedObjectsClient);
   const indexPatternSavedObjects: IIndexPattern[] = await getIndexPatternSavedObjects(
     savedObjectsClient
   );