SFDC：Lightning地図コンポーネントの作成を試してみました

Towerオブジェクト作成

カスタムオブジェクトで作成。取引先と主従関係で紐付く。緯度経度の情報を登録するカスタム項目を用意。

テストデータを作成

取引先に２つのテストデータを作成。

取引先に紐付く形で、Towerオブジェクトのレコードを作成。

Apexクラス作成

public class TowerMapUtilClass {
     public static List<sObject> queryObjects(String theObject, List<String> theFields, String theFilter, String sortField, String sortOrder) {
          String theQuery = 'SELECT ' + string.join(theFields, ',');
          theQuery += ' FROM ' + theObject;
          if(!String.isEmpty(theFilter)) {
               theQuery += ' WHERE ' + theFilter;
          }
          if(!String.isEmpty(sortField)) {
               theQuery += ' ORDER BY ' + sortField;
               if(!String.isEmpty(sortOrder)) {
                    theQuery += ' ' + sortOrder;
               }
          }
          return database.query(theQuery);
     }
}

public class TowerMapControllerClass {
     @AuraEnabled
     public static List<Tower__c> getAllTowers() {
          String theObject = 'Tower__c';
          List<String> theFields = new List<String>{'Id', 'Name', 'State__r.Name', 'Tower_Location__Latitude__s', 'Tower_Location__Longitude__s'};
          String theFilter = '';
          String sortField = 'Name';
          String sortOrder = 'ASC';
          List<Tower__c> allTowers = TowerMapUtilClass.queryObjects(theObject, theFields, theFilter, sortField, sortOrder);
          return allTowers;
     }
}

Lightningコンポーネント作成

<aura:component implements="flexipage:availableForAllPageTypes" controller="TowerMapControllerClass" access="global" >
     <aura:attribute name="mapMarkers" type="Object" access="PRIVATE" />
     <aura:attribute name="markersTitle" type="String" access="PRIVATE" />
     <aura:handler name="init" value="{!this}" action="{!c.handleInit}"/>
     <aura:if isTrue="{!!empty(v.mapMarkers)}" >
          <!-- Create lightning:map here -->
     </aura:if>
</aura:component>

({
     handleInit: function (component, event, helper) {
          helper.initHelper(component, event, helper);
     }
})

({
     initHelper : function(component, event, helper) {
          helper.utilSetMarkers(component, event, helper);
     },
     utilSetMarkers : function(component, event, helper) {
          let action = component.get("c.getAllTowers");
          action.setCallback(this, function(response) {
               const data = response.getReturnValue();
               const dataSize = data.length;
               let markers = [];
               for(let i=0; i < dataSize; i += 1) {
                    const Tower = data[i];
                    markers.push({
                        'location': {
                             'Latitude' : Tower.Tower_Location__Latitude__s,
                             'Longitude' : Tower.Tower_Location__Longitude__s
                        },
                        'icon': 'utility:Tower',
                        'title' : Tower.Name,
                        'description' : Tower.Name + ' Tower Location at ' + Tower.State__r.Name
                   });
               }
               component.set('v.markersTitle', 'Out and About Communications Tower Locations');
               component.set('v.mapMarkers', markers);
          });
          $A.enqueueAction(action);
     }
})

lightning:mapタグ埋め込み

<!-- Create lightning:map here -->
<lightning:map mapMarkers="{! v.mapMarkers }" markersTitle="{!v.markersTitle}" zoomLevel="5" />

あとはLighntingアプリケーションビルダーでLightningページを作成してLightningコンポーネントを追加すればGoogleマップでTowerの位置情報を表示できます。