Continue

Author: sbrunner

core/src/test/java/org/mapfish/print/map/ScaleTest.java

@@ -50,23 +50,28 @@ public void geodetic() {
         1.0);
   }
 
+  /**
+   * This test verifies that the geodetic scale calculation correctly uses position.x for the
+   * horizontal coordinate. In projections like CH2056 (Swiss Oblique Mercator) or UTM, shifting a
+   * point in X direction while keeping Y constant affects the geodetic distance, unlike EPSG:3857
+   * where distortion is primarily latitude-dependent.
+   */
   @Test
   public void geodeticCH2056XPositionDependence() {
-    // This test verifies that the geodetic scale calculation correctly uses position.x
-    // for the horizontal coordinate. In projections like CH2056 (Swiss Oblique Mercator)
-    // or UTM, shifting a point in X direction while keeping Y constant affects the
-    // geodetic distance, unlike EPSG:3857 where distortion is primarily latitude-dependent.
     final Scale scale = new Scale(25000.0, CH2056, PDF_DPI);
 
     // Calculate geodetic scale at two positions with same Y but different X
     // Using coordinates in CH2056 CRS (EPSG:2056)
-    final Coordinate position1 = new Coordinate(2600000.0, 1200000.0);
-    final Coordinate position2 = new Coordinate(2650000.0, 1299970.0);
+    final Coordinate positionRef = new Coordinate(2600000.0, 1200000.0);
+    final Coordinate positionDown = new Coordinate(2600000.0, 1299970.0);
+    final Coordinate positionLeft = new Coordinate(2484274.0, 1200000.0);
 
-    final double geodeticScale1 = scale.getGeodeticDenominator(CH2056, PDF_DPI, position1);
-    final double geodeticScale2 = scale.getGeodeticDenominator(CH2056, PDF_DPI, position2);
+    final double geodeticScaleRef = scale.getGeodeticDenominator(CH2056, PDF_DPI, positionRef);
+    final double geodeticScaleDown = scale.getGeodeticDenominator(CH2056, PDF_DPI, positionDown);
+    final double geodeticScaleLeft = scale.getGeodeticDenominator(CH2056, PDF_DPI, positionLeft);
 
-    assertEquals(geodeticScale1, 24997.0, 1.0);
-    assertEquals(geodeticScale2, 24993.0, 1.0);
+    assertEquals(geodeticScaleRef, 24997.0, 1.0);
+    assertEquals(geodeticScaleDown, 24993.0, 1.0);
+    assertEquals(geodeticScaleLeft, 25001.0, 1.0);
   }
 }