| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.sis.referencing.operation.projection; |
| |
| import org.opengis.util.FactoryException; |
| import org.opengis.referencing.operation.TransformException; |
| import org.opengis.test.ToleranceModifier; |
| import org.apache.sis.internal.referencing.Formulas; |
| import org.apache.sis.internal.referencing.provider.LambertCylindricalEqualArea; |
| import org.apache.sis.internal.referencing.provider.LambertCylindricalEqualAreaSpherical; |
| import org.apache.sis.referencing.operation.transform.CoordinateDomain; |
| import org.apache.sis.test.DependsOnMethod; |
| import org.junit.Test; |
| |
| import static java.lang.StrictMath.*; |
| import static java.lang.Double.NaN; |
| |
| |
| /** |
| * Tests the {@link CylindricalEqualArea} class. |
| * |
| * @author Martin Desruisseaux (Geomatys) |
| * @since 0.8 |
| * @version 0.8 |
| * @module |
| */ |
| public final strictfp class CylindricalEqualAreaTest extends MapProjectionTestCase { |
| /** |
| * Tests the derivatives at a few points. This method compares the derivatives computed by |
| * the projection with an estimation of derivatives computed by the finite differences method. |
| * |
| * @throws TransformException if an error occurred while projecting a point. |
| */ |
| private void testDerivative() throws TransformException { |
| final double delta = toRadians(100.0 / 60) / 1852; // Approximatively 100 metres. |
| derivativeDeltas = new double[] {delta, delta}; |
| tolerance = 1E-6; // More severe than Formulas.LINEAR_TOLERANCE. |
| verifyDerivative(toRadians(15), toRadians( 30)); |
| verifyDerivative(toRadians(10), toRadians(-60)); |
| } |
| |
| /** |
| * Tests <cite>Lambert Cylindrical Equal Area</cite> projection of a point in the in ellipsoidal case. |
| * |
| * @throws FactoryException if an error occurred while creating the map projection. |
| * @throws TransformException if an error occurred while projecting a point. |
| */ |
| @Test |
| public void testEllipsoidal() throws FactoryException, TransformException { |
| createCompleteProjection(new LambertCylindricalEqualArea(), |
| WGS84_A, // Semi-major axis length |
| WGS84_B, // Semi-minor axis length |
| 0, // Central meridian |
| NaN, // Latitude of origin |
| 0, // Standard parallel 1 |
| NaN, // Standard parallel 2 |
| NaN, // Scale factor (none) |
| 0, // False easting |
| 0); // False northing |
| tolerance = Formulas.LINEAR_TOLERANCE; |
| toleranceModifier = ToleranceModifier.PROJECTION; |
| final double λ = 2; |
| final double φ = 1; |
| final double x = 222638.98; // Test point from Proj.4. |
| final double y = 110568.81; |
| verifyTransform(new double[] {λ, φ, -λ, φ, λ, -φ, -λ, -φ}, |
| new double[] {x, y, -x, y, x, -y, -x, -y}); |
| testDerivative(); |
| } |
| |
| /** |
| * Tests <cite>Lambert Cylindrical Equal Area</cite> projection of a point in the in spherical case. |
| * |
| * @throws FactoryException if an error occurred while creating the map projection. |
| * @throws TransformException if an error occurred while projecting a point. |
| */ |
| @Test |
| @DependsOnMethod("testEllipsoidal") |
| public void testSpherical() throws FactoryException, TransformException { |
| createCompleteProjection(new LambertCylindricalEqualArea(), |
| 6371007, // Semi-major axis length |
| 6371007, // Semi-minor axis length |
| 0, // Central meridian |
| NaN, // Latitude of origin |
| 0, // Standard parallel 1 |
| NaN, // Standard parallel 2 |
| NaN, // Scale factor (none) |
| 0, // False easting |
| 0); // False northing |
| tolerance = Formulas.LINEAR_TOLERANCE; |
| toleranceModifier = ToleranceModifier.PROJECTION; |
| final double λ = 2; |
| final double φ = 1; |
| final double x = 222390.10; // Anti-regression values (not from an external source). |
| final double y = 111189.40; |
| verifyTransform(new double[] {λ, φ, -λ, φ, λ, -φ, -λ, -φ}, |
| new double[] {x, y, -x, y, x, -y, -x, -y}); |
| testDerivative(); |
| } |
| |
| /** |
| * Tests <cite>Lambert Cylindrical Equal Area (Spherical)</cite> projection. |
| * The difference between this test and {@link #testSpherical()} is that this case shall |
| * compute the radius of the conformal sphere instead than using the semi-major axis length. |
| * The result near the equator are almost the same however. |
| * |
| * @throws FactoryException if an error occurred while creating the map projection. |
| * @throws TransformException if an error occurred while projecting a point. |
| */ |
| @Test |
| @DependsOnMethod("testSpherical") |
| public void testSphericalWithConformalSphereRadius() throws FactoryException, TransformException { |
| createCompleteProjection(new LambertCylindricalEqualAreaSpherical(), |
| WGS84_A, // Semi-major axis length |
| WGS84_B, // Semi-minor axis length |
| 0, // Central meridian |
| NaN, // Latitude of origin |
| 0, // Standard parallel 1 |
| NaN, // Standard parallel 2 |
| NaN, // Scale factor (none) |
| 0, // False easting |
| 0); // False northing |
| tolerance = Formulas.LINEAR_TOLERANCE; |
| toleranceModifier = ToleranceModifier.PROJECTION; |
| final double λ = 2; |
| final double φ = 1; |
| final double x = 222390.10; // Anti-regression values (not from an external source). |
| final double y = 111189.40; |
| verifyTransform(new double[] {λ, φ, -λ, φ, λ, -φ, -λ, -φ}, |
| new double[] {x, y, -x, y, x, -y, -x, -y}); |
| testDerivative(); |
| } |
| |
| /** |
| * Tests conversion of random points with non-zero central meridian, standard parallel |
| * and false easting/northing. |
| * |
| * @throws FactoryException if an error occurred while creating the map projection. |
| * @throws TransformException if an error occurred while projecting a point. |
| */ |
| @Test |
| public void testRandomPoints() throws FactoryException, TransformException { |
| createCompleteProjection(new LambertCylindricalEqualArea(), |
| WGS84_A, // Semi-major axis length |
| WGS84_B, // Semi-minor axis length |
| 12, // Central meridian |
| NaN, // Latitude of origin (none) |
| 24, // Standard parallel 1 |
| NaN, // Standard parallel 2 |
| NaN, // Scale factor (none) |
| 300, // False easting |
| 200); // False northing |
| |
| tolerance = Formulas.LINEAR_TOLERANCE; |
| toleranceModifier = ToleranceModifier.PROJECTION; |
| derivativeDeltas = new double[] {100, 100}; |
| final double delta = toRadians(100.0 / 60) / 1852; // Approximatively 100 metres. |
| derivativeDeltas = new double[] {delta, delta}; |
| verifyInDomain(CoordinateDomain.GEOGRAPHIC_SAFE, 0); |
| } |
| } |