Do some cleaning

Author: bchapuis

baremaps-raster/src/main/java/org/apache/baremaps/raster/elevation/ChaikinSmoother.java

@@ -39,22 +39,6 @@ protected CoordinateSequence transformCoordinates(
     return smooth(coordinateSequence, iterations, factor);
   }
 
-  public static LinearRing smooth(LinearRing linearRing, int iterations, double factor) {
-    CoordinateSequence coordinateSequence =
-        smooth(linearRing.getCoordinateSequence(), iterations, factor);
-    return linearRing.getFactory().createLinearRing(coordinateSequence);
-  }
-
-  public static LineString smooth(LineString lineString, int iterations, double factor) {
-    CoordinateSequence coordinateSequence =
-        smooth(lineString.getCoordinateSequence(), iterations, factor);
-    return lineString.getFactory().createLineString(coordinateSequence);
-  }
-
-  public static Coordinate[] smooth(Coordinate[] coordinates, int iterations, double factor) {
-    return smooth(new CoordinateArraySequence(coordinates), iterations, factor).toCoordinateArray();
-  }
-
   public static CoordinateSequence smooth(CoordinateSequence coordinateSequence, int iterations,
       double factor) {
     if (CoordinateSequences.isRing(coordinateSequence)) {

baremaps-raster/src/test/java/org/apache/baremaps/raster/elevation/ContourRenderer.java

@@ -24,9 +24,8 @@
 import java.util.stream.Stream;
 import javax.imageio.ImageIO;
 import javax.swing.*;
-import org.locationtech.jts.geom.Coordinate;
 import org.locationtech.jts.geom.Geometry;
-import org.locationtech.jts.geom.GeometryFactory;
+import org.locationtech.jts.geom.util.AffineTransformation;
 
 public class ContourRenderer {
 
@@ -45,28 +44,22 @@ public static void main(String[] args) throws IOException {
     double[] grid = ElevationUtils.imageToGrid(image, ElevationUtils::pixelToElevationStandard);
 
     List<Geometry> contour =
-        new ContourTracer(grid, image.getWidth(), image.getHeight(), true, true)
+        new ContourTracer(grid, image.getWidth(), image.getHeight(), true, false)
             .traceContours(0, 9000, 100);
 
     // Scale the image back to its original size
     image = RasterUtils.resizeImage(image, image.getWidth() * 16, image.getHeight() * 16);
 
     // Scale the contour back to its original size
+    AffineTransformation transformation = AffineTransformation.scaleInstance(16, 16);
     contour = contour.stream()
-        .map(polygon -> {
-          var coordinates = Stream.of(polygon.getCoordinates())
-              .map(c -> new Coordinate(c.getX() * 16, c.getY() * 16))
-              .toArray(Coordinate[]::new);
-          return (Geometry) new GeometryFactory().createPolygon(coordinates);
-        })
+        .map(transformation::transform)
         .toList();
 
     // Smooth the contour with the Chaikin algorithm
+    ChaikinSmoother smoother = new ChaikinSmoother(1, 0.25);
     contour = contour.stream()
-        .map(polygon -> {
-          var coordinates = ChaikinSmoother.smooth(polygon.getCoordinates(), 2, 0.25);
-          return (Geometry) new GeometryFactory().createPolygon(coordinates);
-        })
+        .map(smoother::transform)
         .toList();
 
     // Create a frame to display the contours

baremaps-server/src/main/resources/raster/hillshade.html

@@ -74,7 +74,7 @@
         maxZoom: 18,
         maxPitch: 85
     }));
-    
+
     map.addControl(
         new maplibregl.NavigationControl({
             visualizePitch: false,