feat: major progress

lib/util/geomath.dart

@@ -0,0 +1,37 @@
+import 'dart:math';
+
+import 'package:latlong2/latlong.dart';
+
+LatLng polygonCenterMinmax(List<LatLng> polygon) {
+  double minLat = double.infinity;
+  double maxLat = double.negativeInfinity;
+  double minLng = double.infinity;
+  double maxLng = double.negativeInfinity;
+
+  for (LatLng point in polygon) {
+    minLat = min(minLat, point.latitude);
+    maxLat = max(maxLat, point.latitude);
+    minLng = min(minLng, point.longitude);
+    maxLng = max(maxLng, point.longitude);
+  }
+
+  double centerLat = (minLat + maxLat) / 2;
+  double centerLng = (minLng + maxLng) / 2;
+
+  return LatLng(centerLat, centerLng);
+}
+
+LatLng polygonCenterAvg(List<LatLng> polygon) {
+  double sumLat = 0;
+  double sumLng = 0;
+
+  for (LatLng point in polygon) {
+    sumLat += point.latitude;
+    sumLng += point.longitude;
+  }
+
+  double centerLat = sumLat / polygon.length;
+  double centerLng = sumLng / polygon.length;
+
+  return LatLng(centerLat, centerLng);
+}