Index: trunk/test/unit/org/openstreetmap/josm/data/ImageDataTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/ImageDataTest.java	(revision 19368)
+++ trunk/test/unit/org/openstreetmap/josm/data/ImageDataTest.java	(revision 19387)
@@ -446,4 +446,88 @@
 
     @Test
+    void testUpdateHPosErr() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setExifHPosErr(1.23);
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageHPosErr(list.get(0), 1.23);
+    }
+
+    @Test
+    void testUpdateGpsDatum() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setExifGpsDatum("WGS-84");
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageExifGpsDatum(list.get(0), "WGS-84");
+    }
+
+    @Test
+    void testUpdateGpsTrack() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setExifGpsTrack(180.5);
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageGpsTrack(list.get(0), 180.5);
+    }
+
+    @Test
+    void testUpdateGpsDop() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setExifGpsDop(1.9);
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageExifGpsDop(list.get(0), 1.9);
+    }
+
+    @Test
+    void testUpdateGpsProcMethod() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setExifGpsProcMethod("GNSS RTK CORRELATION");
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageExifGpsProcMethod(list.get(0), "GNSS RTK CORRELATION");
+    }
+
+    @Test
+    void testUpdateGpsDifferentialMode() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setGpsDiffMode(1);
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageGpsDiffMode(list.get(0), 1);
+    }
+
+    @Test
+    void testUpdateGps2d3dMode() {
+        List<ImageEntry> list = getOneImage();
+        ImageData data = new ImageData(list);
+
+        new Expectations(list.get(0)) {{
+            list.get(0).setGps2d3dMode(3);
+            list.get(0).flagNewGpsData();
+        }};
+        data.updateImageGps2d3dMode(list.get(0), 3);
+    }
+
+    @Test
     void testTriggerListenerOnUpdate() {
         List<ImageEntry> list = getOneImage();
Index: trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxImageCorrelationTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxImageCorrelationTest.java	(revision 19368)
+++ trunk/test/unit/org/openstreetmap/josm/data/gpx/GpxImageCorrelationTest.java	(revision 19387)
@@ -351,3 +351,80 @@
         assertEquals(Double.valueOf(150.0d), GpxImageCorrelation.getElevation(wp));
     }
+
+    /**
+     * Unit test of {@link GpxImageCorrelation#getHPosErr}
+     */
+    @Test
+    void testGetHorizontalPosError() {
+        assertNull(GpxImageCorrelation.getHPosErr(null));
+        WayPoint wp = new WayPoint(LatLon.ZERO);
+        assertNull(GpxImageCorrelation.getHPosErr(wp));
+        wp.put(GpxConstants.PT_STD_HDEV, 1.5f);
+        assertEquals(1.5f, GpxImageCorrelation.getHPosErr(wp));
+    }
+
+    /**
+     * Unit test of {@link GpxImageCorrelation#getGpsDop}
+     */
+    @Test
+    void testGetGpsDop() {
+        assertNull(GpxImageCorrelation.getGpsDop(null));
+        WayPoint wp = new WayPoint(LatLon.ZERO);
+        assertNull(GpxImageCorrelation.getGpsDop(wp));
+        wp.put(GpxConstants.PT_HDOP, 2.1f);
+        assertEquals(2.1f, GpxImageCorrelation.getGpsDop(wp));
+        wp.put(GpxConstants.PT_PDOP, 0.9f);
+        assertEquals(0.9f, GpxImageCorrelation.getGpsDop(wp));
+        wp.put(GpxConstants.PT_PDOP, 1.2d);
+        assertEquals(1.2d, GpxImageCorrelation.getGpsDop(wp));
+    }
+
+    /**
+     * Unit test of {@link GpxImageCorrelation#getGpsTrack}
+     */
+    @Test
+    void testGetGpsTrack() {
+        assertNull(GpxImageCorrelation.getHPosErr(null));
+        WayPoint wp = new WayPoint(LatLon.ZERO);
+        assertNull(GpxImageCorrelation.getGpsTrack(wp));
+        wp.put(GpxConstants.PT_COURSE, "");
+        assertNull(GpxImageCorrelation.getGpsTrack(wp));
+        wp.put(GpxConstants.PT_COURSE, "not a number");
+        assertNull(GpxImageCorrelation.getGpsTrack(wp));
+        wp.put(GpxConstants.PT_COURSE, "167.0");
+        assertEquals(Double.valueOf(167.0d), GpxImageCorrelation.getGpsTrack(wp), 0.01d);
+    }
+
+    /**
+     * Unit test of {@link GpxImageCorrelation#getGpsProcMethod}
+     */
+    @Test
+    void testGetGpsProcMethod() {
+        final List<String> positionningModes = Arrays.asList("none", "manual", "estimated", "2d", "3d", "dgps", "float rtk", "rtk");
+        assertNull(GpxImageCorrelation.getGpsProcMethod(null, null, positionningModes));
+        assertNull(GpxImageCorrelation.getGpsProcMethod("", "", positionningModes));
+        assertNull(GpxImageCorrelation.getGpsProcMethod("3d", null, positionningModes));
+        assertNull(GpxImageCorrelation.getGpsProcMethod("", "dgps", positionningModes));
+        assertEquals("MANUAL CORRELATION", GpxImageCorrelation.getGpsProcMethod("manual", "rtk", positionningModes));
+        assertEquals("ESTIMATED CORRELATION", GpxImageCorrelation.getGpsProcMethod("estimated", "2d", positionningModes));
+        assertEquals("GNSS DGPS CORRELATION", GpxImageCorrelation.getGpsProcMethod("rtk", "dgps", positionningModes));
+        assertEquals("GNSS RTK_FLOAT CORRELATION", GpxImageCorrelation.getGpsProcMethod("float rtk", "rtk", positionningModes));
+        assertEquals("GNSS RTK_FIX CORRELATION", GpxImageCorrelation.getGpsProcMethod("rtk", "rtk", positionningModes));
+    }
+
+    /**
+     * Unit test of {@link GpxImageCorrelation#getGps2d3dMode}
+     */
+    @Test
+    void testGetGps2d3dMode() {
+        final List<String> positionningModes = Arrays.asList("none", "manual", "estimated", "2d", "3d", "dgps", "float rtk", "rtk");
+        assertNull(GpxImageCorrelation.getGps2d3dMode(null, null, positionningModes));
+        assertNull(GpxImageCorrelation.getGps2d3dMode("", "", positionningModes));
+        assertNull(GpxImageCorrelation.getGps2d3dMode("3d", null, positionningModes));
+        assertNull(GpxImageCorrelation.getGps2d3dMode("", "dgps", positionningModes));
+        assertNull(GpxImageCorrelation.getGps2d3dMode("estimated", "rtk", positionningModes));
+        assertEquals(2, GpxImageCorrelation.getGps2d3dMode("2d", "2d", positionningModes));
+        assertEquals(2, GpxImageCorrelation.getGps2d3dMode("2d", "3d", positionningModes));
+        assertEquals(3, GpxImageCorrelation.getGps2d3dMode("3d", "dgps", positionningModes));
+    }
 }
Index: trunk/test/unit/org/openstreetmap/josm/tools/ExifReaderTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/ExifReaderTest.java	(revision 19368)
+++ trunk/test/unit/org/openstreetmap/josm/tools/ExifReaderTest.java	(revision 19387)
@@ -22,5 +22,5 @@
  */
 class ExifReaderTest {
-    private File orientationSampleFile, directionSampleFile;
+    private File orientationSampleFile, directionSampleFile, positionErrorSampleFile;
 
     /**
@@ -31,4 +31,5 @@
         directionSampleFile = new File("nodist/data/exif-example_direction.jpg");
         orientationSampleFile = new File("nodist/data/exif-example_orientation=6.jpg");
+        positionErrorSampleFile = new File("nodist/data/exif-position-error.jpg"); 
     }
 
@@ -56,4 +57,13 @@
     }
 
+    /**
+     * Test reading GPS date and time
+     */
+    @Test
+    void testReadGpsDateTime() {
+        Instant date = ExifReader.readGpsInstant(positionErrorSampleFile);
+        assertEquals(Instant.parse("2024-04-30T16:36:42Z"), date);
+    }
+ 
     /**
      * Test orientation extraction
@@ -102,4 +112,60 @@
 
     /**
+     * Test horizontal position error extraction
+     */
+    @Test
+    void testReadHorPosError() {
+        assertEquals(Double.valueOf(0.014), ExifReader.readHpositioningError(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS track course extraction
+     */
+    @Test
+    void testReadGpsTrack() {
+        assertEquals(Double.valueOf(298), ExifReader.readGpsTrackDirection(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS differential mode extraction
+     */
+    @Test
+    void testReadGpsDiffmode() {
+        assertEquals(Integer.valueOf(1), ExifReader.readGpsDiffMode(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS DOP value extraction
+     */
+    @Test
+    void testReadGpsDop() {
+        assertEquals(Double.valueOf(0.92), ExifReader.readGpsDop(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS measure mode (2D/3D) extraction
+     */
+    @Test
+    void testReadGps2d3dMode() {
+        assertEquals(Integer.valueOf(3), ExifReader.readGpsMeasureMode(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS datum extraction
+     */
+    @Test
+    void testReadGpsDatum() {
+        assertEquals(String.valueOf("EPSG:9782"), ExifReader.readGpsDatum(positionErrorSampleFile));
+    }
+
+    /**
+     * Test GPS processing method extraction
+     */
+    @Test
+    void testReadGpsProcMethod() {
+        assertEquals(String.valueOf("GNSS RTK_FIX CORRELATION"), ExifReader.readGpsProcessingMethod(positionErrorSampleFile));
+    }
+
+    /**
      * Non-regression test for ticket <a href="https://josm.openstreetmap.de/ticket/11685">#11685</a>
      * @throws IOException if an error occurs during reading