Add map projection framework and integrate initial SwissGrid and UTM projections

- Introduced `MapProjection` interface for handling coordinate projections and unprojections.
- Added `SwissGridProjection` and `SwissGridVariant` for Swiss coordinate systems.
- Implemented `UtmProjection` and `UtmResult` for UTM coordinate systems, including hemisphere and zone handling.
- Created supporting classes such as `GeodeticDatum`, `MapDate`, and projection-specific result types for extensibility.
- Extended `BalloonLiveParser` and added `TrackParser` interface to structure track parsing functionality.

src/main/java/dev/coph/flightscore/backend/map/GeodeticDatum.java

@@ -0,0 +1,7 @@
+package dev.coph.flightscore.backend.map;
+
+public record GeodeticDatum(double semiMajorAxis, double flattening, double dx, double dy, double dz) {
+    public static final GeodeticDatum WGS84 = new GeodeticDatum(6378137.0, 1 / 298.257223563, 0, 0, 0);
+    public static final GeodeticDatum ETRS89 = new GeodeticDatum(6378137.0, 1 / 298.257222101, 0, 0, 0);
+    public static final GeodeticDatum BESSEL_CH = new GeodeticDatum(6377397.155, 1 / 299.1528128, 674.374, 15.056, 405.346);
+}

src/main/java/dev/coph/flightscore/backend/map/MapDate.java

@@ -0,0 +1,6 @@
+package dev.coph.flightscore.backend.map;
+
+public class MapDate {
+
+
+}

src/main/java/dev/coph/flightscore/backend/map/projection/MapProjection.java

@@ -0,0 +1,10 @@
+package dev.coph.flightscore.backend.map.projection;
+
+import dev.coph.flightscore.backend.coordinate.Coordinate;
+import dev.coph.flightscore.backend.map.GeodeticDatum;
+
+public interface MapProjection<T> {
+    T project(double latitude, double longitude, GeodeticDatum sourceDatum);
+
+    Coordinate unproject(T projectedCoordinate, GeodeticDatum sourceDatum);
+}

src/main/java/dev/coph/flightscore/backend/map/projection/swiss/SwissGridProjection.java

@@ -0,0 +1,24 @@
+package dev.coph.flightscore.backend.map.projection.swiss;
+
+import dev.coph.flightscore.backend.coordinate.Coordinate;
+import dev.coph.flightscore.backend.map.GeodeticDatum;
+import dev.coph.flightscore.backend.map.projection.MapProjection;
+
+public class SwissGridProjection implements MapProjection<SwissResult> {
+    private final GeodeticDatum targetDatum = GeodeticDatum.BESSEL_CH;
+    private final SwissGridVariant variant;
+
+    public SwissGridProjection(SwissGridVariant variant) {
+        this.variant = variant;
+    }
+
+    @Override
+    public SwissResult project(double latitude, double longitude, GeodeticDatum sourceDatum) {
+        return null;
+    }
+
+    @Override
+    public Coordinate unproject(SwissResult projectedCoordinate, GeodeticDatum sourceDatum) {
+        return null;
+    }
+}

src/main/java/dev/coph/flightscore/backend/map/projection/swiss/SwissGridVariant.java

@@ -0,0 +1,8 @@
+package dev.coph.flightscore.backend.map.projection.swiss;
+
+public enum SwissGridVariant {
+    LV03,
+    LV95;
+
+
+}

src/main/java/dev/coph/flightscore/backend/map/projection/swiss/SwissResult.java

@@ -0,0 +1,6 @@
+package dev.coph.flightscore.backend.map.projection.swiss;
+
+public record SwissResult(double east, double north) {
+
+
+}

src/main/java/dev/coph/flightscore/backend/map/projection/utm/UtmProjection.java

@@ -0,0 +1,52 @@
+package dev.coph.flightscore.backend.map.projection.utm;
+
+import dev.coph.flightscore.backend.coordinate.Coordinate;
+import dev.coph.flightscore.backend.map.GeodeticDatum;
+import dev.coph.flightscore.backend.map.projection.MapProjection;
+
+public class UtmProjection implements MapProjection<UtmResult> {
+    private final int zone;
+    private final boolean isNorthernHemisphere;
+    private final GeodeticDatum targetDatum;
+
+    public UtmProjection(int zone, boolean isNorthernHemisphere, GeodeticDatum targetDatum) {
+        this.zone = zone;
+        this.isNorthernHemisphere = isNorthernHemisphere;
+        this.targetDatum = targetDatum;
+    }
+
+    @Override
+    public UtmResult project(double latitude, double longitude, GeodeticDatum sourceDatum) {
+        return null;
+    }
+
+    @Override
+    public Coordinate unproject(UtmResult projectedCoordinate, GeodeticDatum sourceDatum) {
+        return null;
+    }
+
+
+    private char getUtmLetterDesignator(double lat) {
+        if (lat <= 84 && lat >= 72) return 'X';
+        else if (lat < 72 && lat >= 64) return 'W';
+        else if (lat < 64 && lat >= 56) return 'V';
+        else if (lat < 56 && lat >= 48) return 'U';
+        else if (lat < 48 && lat >= 40) return 'T';
+        else if (lat < 40 && lat >= 32) return 'S';
+        else if (lat < 32 && lat >= 24) return 'R';
+        else if (lat < 24 && lat >= 16) return 'Q';
+        else if (lat < 16 && lat >= 8) return 'P';
+        else if (lat < 8 && lat >= 0) return 'N';
+        else if (lat < 0 && lat >= -8) return 'M';
+        else if (lat < -8 && lat >= -16) return 'L';
+        else if (lat < -16 && lat >= -24) return 'K';
+        else if (lat < -24 && lat >= -32) return 'J';
+        else if (lat < -32 && lat >= -40) return 'H';
+        else if (lat < -40 && lat >= -48) return 'G';
+        else if (lat < -48 && lat >= -56) return 'F';
+        else if (lat < -56 && lat >= -64) return 'E';
+        else if (lat < -64 && lat >= -72) return 'D';
+        else if (lat < -72 && lat >= -80) return 'C';
+        else return 'Z';
+    }
+}

src/main/java/dev/coph/flightscore/backend/map/projection/utm/UtmResult.java

@@ -0,0 +1,7 @@
+package dev.coph.flightscore.backend.map.projection.utm;
+
+public record UtmResult(double easting, double northing, int zone, char band, String fullZone) {
+    public UtmResult(double easting, double northing, int zone, char band) {
+        this(easting, northing, zone, band, zone + String.valueOf(band));
+    }
+}

src/main/java/dev/coph/flightscore/backend/track/parser/BalloonLiveParser.java

@@ -1,7 +1,12 @@
 package dev.coph.flightscore.backend.track.parser;
 
-public class BalloonLiveParser {
+import dev.coph.flightscore.backend.track.Track;
 
-    
+public class BalloonLiveParser  implements TrackParser{
 
+
+    @Override
+    public Track parse(String[] lines) {
+        
+    }
 }

src/main/java/dev/coph/flightscore/backend/track/parser/TrackParser.java

@@ -0,0 +1,12 @@
+package dev.coph.flightscore.backend.track.parser;
+
+import dev.coph.flightscore.backend.coordinate.Coordinate;
+import dev.coph.flightscore.backend.track.Track;
+
+import java.io.File;
+
+public interface TrackParser {
+
+    public Track parse(String[] lines, Coordinate referenceCoordinate   );
+
+}