wgs84 és eov koordinátákat megjelenítő kártyák, eov magasság

2026-06-07 11:45:15 +02:00
parent 497821bb41
commit b85cdb2596
9 changed files with 422 additions and 1 deletions
@@ -0,0 +1,88 @@
+enum Wgs84CoordinateFormat {
+  decimalDegrees,
+  degreesDecimalMinutes,
+  degreesMinutesSeconds
+}
+
+extension Wgs84CoordinateFormatLabel on Wgs84CoordinateFormat {
+  String get label {
+    switch (this) {
+      case Wgs84CoordinateFormat.decimalDegrees:
+        return 'Tizedes fok';
+      case Wgs84CoordinateFormat.degreesDecimalMinutes:
+        return 'Fok + tizedes perc';
+      case Wgs84CoordinateFormat.degreesMinutesSeconds:
+        return 'Fok - perc - másodperc';
+    }
+  }
+
+  String get shortLabel {
+    switch (this) {
+      case Wgs84CoordinateFormat.decimalDegrees:
+        return 'DD';
+      case Wgs84CoordinateFormat.degreesDecimalMinutes:
+        return 'DM';
+      case Wgs84CoordinateFormat.degreesMinutesSeconds:
+        return 'DMS';
+    }
+  }
+}
+
+class Wgs84CoordinateFormatter {
+  static String formatLatitude(
+    double? value,
+    Wgs84CoordinateFormat format,
+  ) {
+    return _format(
+      value: value,
+      format: format,
+      positiveHemisphere: 'N',
+      negativeHemisphere: 'S',
+    );
+  }
+
+  static String formatLongitude(
+    double? value,
+    Wgs84CoordinateFormat format,
+  ) {
+    return _format(
+      value: value,
+      format: format,
+      positiveHemisphere: 'E',
+      negativeHemisphere: 'W',
+    );
+  }
+
+  static String _format({
+    required double? value,
+    required Wgs84CoordinateFormat format,
+    required String positiveHemisphere,
+    required String negativeHemisphere,
+  }) {
+    if (value == null || value.isNaN || value.isInfinite) {
+      return '-';
+    }
+
+    final hemisphere = value >= 0 ? positiveHemisphere : negativeHemisphere;
+    final absValue = value.abs();
+
+    switch (format) {
+      case Wgs84CoordinateFormat.decimalDegrees:
+        return '${absValue.toStringAsFixed(8)}° $hemisphere';
+
+      case Wgs84CoordinateFormat.degreesDecimalMinutes:
+        final deg = absValue.floor();
+        final minutes = (absValue - deg) * 60.0;
+
+        return '$deg° ${minutes.toStringAsFixed(5)}′ $hemisphere';
+
+      case Wgs84CoordinateFormat.degreesMinutesSeconds:
+        final deg = absValue.floor();
+        final fullMinutes = (absValue - deg) * 60.0;
+        final min = fullMinutes.floor();
+        final sec = (fullMinutes - min) * 60.0;
+
+        return '$deg° $min′ ${sec.toStringAsFixed(3)}″ $hemisphere';
+    }
+  }
+}