GNSS/MobilApp
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Proj4 refraktorálás a CoordConverterService osztályba. MapController refraktorálás.

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This commit is contained in:
torok.istvan 2026-05-09 22:04:14 +02:00
parent 7ee47e65bd
commit 81f1fa5cd7
3 changed files with 46 additions and 19 deletions
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3
lib/main.dart
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@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:supabase_flutter/supabase_flutter.dart';
import 'package:terepi_seged/routes/app_pages.dart';
import 'package:terepi_seged/services/coord_converter_service.dart';
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
@ -13,6 +14,8 @@ Future<void> main() async {
anonKey:
'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.ewogICJyb2xlIjogImFub24iLAogICJpc3MiOiAic3VwYWJhc2UiLAogICJpYXQiOiAxNzQwMjY1MjAwLAogICJleHAiOiAxODk4MDMxNjAwCn0.4cMVfAnBLxne1lq0fm94rgtXLBJdRx-0f-E4Jd_jFwI');
await Get.putAsync(() => CoordConverterService().onInit());
runApp(const MyApp());
}

25
lib/pages/map/presentation/controllers/map_controller.dart
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@ -29,9 +29,9 @@ import 'package:terepi_seged/gnss_sentences/gngst.dart';
import 'package:terepi_seged/gnss_sentences/gnrmc.dart';
import 'package:terepi_seged/models/point_to_measure.dart';
import 'package:terepi_seged/models/point_with_description_model.dart';
import 'package:proj4dart/proj4dart.dart' as proj4;
import 'package:shared_preferences/shared_preferences.dart';
import 'package:terepi_seged/pages/map/presentation/views/measured_points_table_dialog.dart';
import 'package:terepi_seged/services/coord_converter_service.dart';
class MapViewController extends GetxController {
// String gpsAddress = "E8:31:CD:14:8B:B2";
@ -124,7 +124,6 @@ class MapViewController extends GetxController {
late Directory? directory;
late File dataFile;
late proj4.Projection eovProj, wgsProj;
RxBool mapIsInitialized = false.obs;
// GeoJsonParser parser =
@ -147,18 +146,7 @@ class MapViewController extends GetxController {
@override
void onInit() async {
super.onInit();
final bytes = (await rootBundle.load('assets/Grids/etrs2eov_notowgs.gsb'))
.buffer
.asUint8List();
proj4.Projection.nadgrid('Etrs2Eov', bytes);
// var 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=@ignorable,Etrs2Eov,null +no_defs';
var 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';
// Named Projection signature, later find it from anywhere via Projection.get('EPSG:23700')
eovProj = proj4.Projection.add('EPSG:23700', def);
wgsProj = proj4.Projection.WGS84;
//Loading, Success, Error handle with 1 line of code
nmeaDecoder
..registerTalkerSentence("GGA", (line) => Gngga(raw: line))
@ -500,8 +488,8 @@ class MapViewController extends GetxController {
pointsToMeasure[pointsToMeasureSelectedValue.value].coordX;
double coordY =
pointsToMeasure[pointsToMeasureSelectedValue.value].coordY;
var eovCoord = proj4.Point(x: coordX, y: coordY);
var wgsCoord = eovProj.transform(wgsProj, eovCoord);
var wgsCoord =
CoordConverterService.to.eovToWgsPoint(coordX, coordY);
distance.value = calculateDistance(
LatLng(gpsLatitude.value, gpsLongitude.value),
LatLng(wgsCoord.y, wgsCoord.x));
@ -906,8 +894,8 @@ class MapViewController extends GetxController {
pointsToMeasure
.add(PointToMeasure(id: id, coordX: coordX, coordY: coordY));
var eovCoord = proj4.Point(x: coordX, y: coordY);
var wgsCoord = eovProj.transform(wgsProj, eovCoord);
var wgsCoord =
CoordConverterService.to.eovToWgsPoint(coordX, coordY);
print("Lat -> ${wgsCoord.x}, Long -> ${wgsCoord.y}");
@ -980,8 +968,7 @@ class MapViewController extends GetxController {
pointsToMeasure
.add(PointToMeasure(id: id, coordX: coordX, coordY: coordY));
var eovCoord = proj4.Point(x: coordX, y: coordY);
var wgsCoord = eovProj.transform(wgsProj, eovCoord);
var wgsCoord = CoordConverterService.to.eovToWgsPoint(coordX, coordY);
print("Lat -> ${wgsCoord.x}, Long -> ${wgsCoord.y}");

37
lib/services/coord_converter_service.dart Normal file
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@ -0,0 +1,37 @@
import 'package:flutter/services.dart';
import 'package:get/get.dart';
import 'package:proj4dart/proj4dart.dart' as proj4;
class CoordConverterService extends GetxService {
static CoordConverterService get to => Get.find();
late proj4.Projection eovProj;
late proj4.Projection wgsProj;
@override
Future<void> onInit() async {
super.onInit();
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;
}
// Segédmetódusok — nem kötelező, de tisztább
proj4.Point wgsToEovPoint(double lon, double lat) =>
wgsProj.transform(eovProj, proj4.Point(x: lon, y: lat));
proj4.Point eovToWgsPoint(double y, double x) =>
eovProj.transform(wgsProj, proj4.Point(x: y, y: x));
}