diff --git a/source/simulation2/Simulation2.cpp b/source/simulation2/Simulation2.cpp
index 3cdc6cbe9b..f868dc9ae6 100644
--- a/source/simulation2/Simulation2.cpp
+++ b/source/simulation2/Simulation2.cpp
@@ -886,7 +886,7 @@ std::string CSimulation2::GetPlayerDefaults()
 
 std::string CSimulation2::GetMapSizes()
 {
-	return ReadJSON(L"simulation/data/map_sizes.json");
+	return ReadJSON(L"simulation/data/settings/map_sizes.json");
 }
 
 std::string CSimulation2::GetAIData()
diff --git a/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp b/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
index 16ebd68ca4..5045b084f3 100644
--- a/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
+++ b/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
@@ -373,7 +373,7 @@ void MapSidebar::OnFirstDisplay()
 	qrySizes.Post();
 	AtObj sizes = AtlasObject::LoadFromJSON(*qrySizes.sizes);
 	wxChoice* sizeChoice = wxDynamicCast(FindWindow(ID_RandomSize), wxChoice);
-	for (AtIter s = sizes["Sizes"]["item"]; s.defined(); ++s)
+	for (AtIter s = sizes["Data"]["item"]; s.defined(); ++s)
 	{
 		long tiles = 0;
 		wxString(s["Tiles"]).ToLong(&tiles);
diff --git a/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Terrain/Terrain.cpp b/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Terrain/Terrain.cpp
index f31047da37..2c2287aef7 100644
--- a/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Terrain/Terrain.cpp
+++ b/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Terrain/Terrain.cpp
@@ -286,7 +286,7 @@ void TerrainSidebar::OnResizeMap(wxCommandEvent& WXUNUSED(evt))
 	AtlasMessage::qGetMapSizes qrySizes;
 	qrySizes.Post();
 	AtObj sizes = AtlasObject::LoadFromJSON(*qrySizes.sizes);
-	for (AtIter s = sizes["Sizes"]["item"]; s.defined(); ++s)
+	for (AtIter s = sizes["Data"]["item"]; s.defined(); ++s)
 	{
 		long tiles = 0;
 		wxString(s["Tiles"]).ToLong(&tiles);