diff --git a/API.md b/API.md
index 654bad9..92480fb 100644
--- a/API.md
+++ b/API.md
@@ -11,17 +11,24 @@ Other participants for this project are Adrien Vannson & Gabriel Dehame & Maxime
 
 ## Functions
 ### /api/map/get_floor/ID/REPRESENTATION
- > Return a list of place composing floor _ID_
+ > Return a json with siteId, buildingId and 'places': a list of place composing floor _ID_
  > _REPRESENTATION_ is the representation' type to consider for every places in {'Cylinder', 'PolySurface'}. The default is 'Cylinder'
  > Other representations should be added later, and it should become a priority order instead of a strict selection (actually if a place doesn't have Cylinder representation, it will return an empty list, even if the place has a PolySurface representation).
 
-__Each place is a dict :__
+__The dict looks like :__
 ```json
 {
-	'id': int, //unique id
-	'names' : string[], //possibly empty,
-	'type': string, //in {'C'(orridor), 'S'(tairs), 'E'(levator), 'R'(oom)} ,
-	'surface' : list of [int, int] //list of every points composing the room, projected on the floor surface
+    'idSite' : int, //id of the Site
+    'idBuilding': int, //id of the Building
+    'places : [
+        {
+            'id': int, //unique id
+            'names' : string[], //Names of the place, possibly empty,
+            'type': string, //in {'C'(orridor), 'S'(tairs), 'E'(levator), 'R'(oom)} ,
+            'surface' : list of [int, int] //list of every points composing the room, projected on the floor surface
+        },
+        {...}
+    ]
 }
 ```
 __Errors :__
diff --git a/src/Controller/MapApiController.php b/src/Controller/MapApiController.php
index 42fc873..f4f4e75 100644
--- a/src/Controller/MapApiController.php
+++ b/src/Controller/MapApiController.php
@@ -91,7 +91,7 @@ class MapApiController extends AbstractController
         elseif (sizeof($floors)>1) { throw new Exception('Internal Error: '.$id.' refers to more than one floorId ; the BDD is corrupted.'); }
         $floor = $floors[0];
         $places = $floor->getPlaces();
-        $jsonPlaces = new ArrayCollection();
+        $jsonPlaces = array();
         if ($representation == 'Cylinder' || $representation == 'PolySurface'){
             foreach ($places as $place){
                 $jsonPlaces[] = array(
@@ -105,7 +105,11 @@ class MapApiController extends AbstractController
         else {
             return $this->json(["Error on represantation attribute"]); 
         }
-        return $this->json($jsonPlaces->toArray());
+        $building = $floor->getBuilding();
+        return $this->json(['idSite' => $building->getId(),
+            'idBuilding' => $building->getSite()->getId(),
+            'places' => $jsonPlaces
+        ]);
     }
 
     #[Route('/api/map/get_all_floors/')]
diff --git a/src/Entity/Place.php b/src/Entity/Place.php
index 43ae3f1..ec2ff5a 100644
--- a/src/Entity/Place.php
+++ b/src/Entity/Place.php
@@ -88,11 +88,11 @@ class Place
 
     public function getJoinedNames(): array
     {
-        $names = new ArrayCollection();
+        $names = array();
         foreach ($this->names as $plName) {
             $names[] = $plName->getName();
         }
-        return $names->toArray();
+        return $names;
     }
 
     public function addName(PlaceName $name): self