diff --git a/app/assets/javascripts/leaflet.map.js b/app/assets/javascripts/leaflet.map.js
index fe4b139d14..78f43b73a0 100644
--- a/app/assets/javascripts/leaflet.map.js
+++ b/app/assets/javascripts/leaflet.map.js
@@ -15,108 +15,24 @@ L.OSM.Map = L.Map.extend({
   initialize: function (id, options) {
     L.Map.prototype.initialize.call(this, id, options);
 
-    const layerCredits = {
-      mapnik: {
-        id: "make_a_donation",
-        href: "https://supporting.openstreetmap.org",
-        donate: true
-      },
-      cyclosm: {
-        id: "cyclosm_credit",
-        children: {
-          cyclosm_link: {
-            id: "cyclosm_name",
-            href: "https://www.cyclosm.org"
-          },
-          osm_france_link: {
-            id: "osm_france",
-            href: "https://openstreetmap.fr/"
-          }
-        }
-      },
-      thunderforest: {
-        id: "thunderforest_credit",
-        children: {
-          thunderforest_link: {
-            id: "andy_allan",
-            href: "https://www.thunderforest.com/"
-          }
-        }
-      },
-      tracestrack: {
-        id: "tracestrack_credit",
-        children: {
-          tracestrack_link: {
-            id: "tracestrack",
-            href: "https://www.tracestrack.com/"
-          }
-        }
-      },
-      hotosm: {
-        id: "hotosm_credit",
-        children: {
-          hotosm_link: {
-            id: "hotosm_name",
-            href: "https://www.hotosm.org/"
-          },
-          osm_france_link: {
-            id: "osm_france",
-            href: "https://openstreetmap.fr/"
-          }
-        }
-      }
-    };
-
     this.baseLayers = [];
 
-    this.baseLayers.push(new L.OSM.Mapnik({
-      attribution: makeAttribution("mapnik"),
-      code: "M",
-      keyid: "mapnik",
-      name: I18n.t("javascripts.map.base.standard")
-    }));
-
-    this.baseLayers.push(new L.OSM.CyclOSM({
-      attribution: makeAttribution("cyclosm"),
-      code: "Y",
-      keyid: "cyclosm",
-      name: I18n.t("javascripts.map.base.cyclosm")
-    }));
-
-    if (OSM.THUNDERFOREST_KEY) {
-      this.baseLayers.push(new L.OSM.CycleMap({
-        attribution: makeAttribution("thunderforest"),
-        apikey: OSM.THUNDERFOREST_KEY,
-        code: "C",
-        keyid: "cyclemap",
-        name: I18n.t("javascripts.map.base.cycle_map")
-      }));
-
-      this.baseLayers.push(new L.OSM.TransportMap({
-        attribution: makeAttribution("thunderforest"),
-        apikey: OSM.THUNDERFOREST_KEY,
-        code: "T",
-        keyid: "transportmap",
-        name: I18n.t("javascripts.map.base.transport_map")
-      }));
-    }
+    for (const layerDefinition of OSM.LAYER_DEFINITIONS) {
+      if (layerDefinition.apiKeyId && !OSM[layerDefinition.apiKeyId]) continue;
 
-    if (OSM.TRACESTRACK_KEY) {
-      this.baseLayers.push(new L.OSM.TracestrackTopo({
-        attribution: makeAttribution("tracestrack"),
-        apikey: OSM.TRACESTRACK_KEY,
-        code: "P",
-        keyid: "tracestracktopo",
-        name: I18n.t("javascripts.map.base.tracestracktop_topo")
-      }));
-    }
+      const layerOptions = {
+        attribution: makeAttribution(layerDefinition.credit),
+        code: layerDefinition.code,
+        keyid: layerDefinition.keyId,
+        name: I18n.t(`javascripts.map.base.${layerDefinition.nameId}`)
+      };
+      if (layerDefinition.apiKeyId) {
+        layerOptions.apikey = OSM[layerDefinition.apiKeyId];
+      }
 
-    this.baseLayers.push(new L.OSM.HOT({
-      attribution: makeAttribution("hotosm"),
-      code: "H",
-      keyid: "hot",
-      name: I18n.t("javascripts.map.base.hot")
-    }));
+      const layer = new L.OSM[layerDefinition.leafletOsmId](layerOptions);
+      this.baseLayers.push(layer);
+    }
 
     this.noteLayer = new L.FeatureGroup();
     this.noteLayer.options = { code: "N" };
@@ -135,8 +51,7 @@ L.OSM.Map = L.Map.extend({
       }
     });
 
-    function makeAttribution(id) {
-      const layerCredit = layerCredits[id];
+    function makeAttribution(credit) {
       let attribution = "";
 
       attribution += I18n.t("javascripts.map.copyright_text", {
@@ -146,8 +61,8 @@ L.OSM.Map = L.Map.extend({
         }).prop("outerHTML")
       });
 
-      attribution += layerCredit.donate ? " ♥ " : ". ";
-      attribution += makeCredit(layerCredit);
+      attribution += credit.donate ? " ♥ " : ". ";
+      attribution += makeCredit(credit);
       attribution += ". ";
 
       attribution += $("<a>", {
diff --git a/app/assets/javascripts/osm.js.erb b/app/assets/javascripts/osm.js.erb
index e08528f845..e9c09c79f9 100644
--- a/app/assets/javascripts/osm.js.erb
+++ b/app/assets/javascripts/osm.js.erb
@@ -1,5 +1,6 @@
 //= depend_on settings.yml
 //= depend_on settings.local.yml
+//= depend_on layers.yml
 //= depend_on key.yml
 //= require qs/dist/qs
 
@@ -30,6 +31,7 @@ OSM = {
   TRACESTRACK_KEY:         <%= Settings.tracestrack_key.to_json %>,
 <% end %>
 
+  LAYER_DEFINITIONS:       <%= YAML.load_file(Rails.root.join("config/layers.yml")).to_json %>,
   LAYERS_WITH_MAP_KEY:     <%= YAML.load_file(Rails.root.join("config/key.yml")).keys.to_json %>,
 
   MARKER_GREEN:            <%= image_path("marker-green.png").to_json %>,
diff --git a/config/layers.yml b/config/layers.yml
new file mode 100644
index 0000000000..3b5bc944fe
--- /dev/null
+++ b/config/layers.yml
@@ -0,0 +1,72 @@
+- leafletOsmId: "Mapnik"
+  code: "M"
+  keyId: "mapnik"
+  nameId: "standard"
+  credit:
+    id: "make_a_donation"
+    href: "https://supporting.openstreetmap.org"
+    donate: true
+
+- leafletOsmId: "CyclOSM"
+  code: "Y"
+  keyId: "cyclosm"
+  nameId: "cyclosm"
+  credit:
+    id: "cyclosm_credit"
+    children:
+      cyclosm_link:
+        id: "cyclosm_name"
+        href: "https://www.cyclosm.org"
+      osm_france_link:
+        id: "osm_france"
+        href: "https://openstreetmap.fr/"
+
+- leafletOsmId: "CycleMap"
+  code: "C"
+  keyId: "cyclemap"
+  nameId: "cycle_map"
+  apiKeyId: "THUNDERFOREST_KEY"
+  credit:
+    id: "thunderforest_credit"
+    children:
+      thunderforest_link:
+        id: "andy_allan"
+        href: "https://www.thunderforest.com/"
+
+- leafletOsmId: "TransportMap"
+  code: "T"
+  keyId: "transportmap"
+  nameId: "transport_map"
+  apiKeyId: "THUNDERFOREST_KEY"
+  credit:
+    id: "thunderforest_credit"
+    children:
+      thunderforest_link:
+        id: "andy_allan"
+        href: "https://www.thunderforest.com/"
+
+- leafletOsmId: "TracestrackTopo"
+  code: "P"
+  keyId: "tracestracktopo"
+  nameId: "tracestracktop_topo"
+  apiKeyId: "TRACESTRACK_KEY"
+  credit:
+    id: "tracestrack_credit"
+    children:
+      tracestrack_link:
+        id: "tracestrack"
+        href: "https://www.tracestrack.com/"
+
+- leafletOsmId: "HOT"
+  code: "H"
+  keyId: "hot"
+  nameId: "hot"
+  credit:
+    id: "hotosm_credit"
+    children:
+      hotosm_link:
+        id: "hotosm_name"
+        href: "https://www.hotosm.org/"
+      osm_france_link:
+        id: "osm_france"
+        href: "https://openstreetmap.fr/"