Hibajavítás: CoordConverterService

lib/main.dart

@@ -14,7 +14,8 @@ Future<void> main() async {
       anonKey:
           'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.ewogICJyb2xlIjogImFub24iLAogICJpc3MiOiAic3VwYWJhc2UiLAogICJpYXQiOiAxNzQwMjY1MjAwLAogICJleHAiOiAxODk4MDMxNjAwCn0.4cMVfAnBLxne1lq0fm94rgtXLBJdRx-0f-E4Jd_jFwI');
 
-  await Get.putAsync(() => CoordConverterService().onInit());
+  await Get.putAsync<CoordConverterService>(
+      () => CoordConverterService().init());
 
   runApp(const MyApp());
 }

lib/services/coord_converter_service.dart

@@ -28,6 +28,25 @@ class CoordConverterService extends GetxService {
     wgsProj = proj4.Projection.WGS84;
   }
 
+  Future<CoordConverterService> init() async {
+    final bytes = (await rootBundle.load('assets/Grids/etrs2eov_notowgs.gsb'))
+        .buffer
+        .asUint8List();
+
+    proj4.Projection.nadgrid('Etrs2Eov', bytes);
+
+    const def =
+        '+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 '
+        '+k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 '
+        '+towgs84=52.17,-71.82,-14.9,0,0,0,0 '
+        '+units=m +nadgrids=Etrs2Eov +no_defs';
+
+    eovProj = proj4.Projection.add('EPSG:23700', def);
+    wgsProj = proj4.Projection.WGS84;
+
+    return this; // ← ez a kulcs
+  }
+
   // Segédmetódusok — nem kötelező, de tisztább
   proj4.Point wgsToEovPoint(double lon, double lat) =>
       wgsProj.transform(eovProj, proj4.Point(x: lon, y: lat));