Examples of org.geotools.coverage.Category.geophysics()

org.geotools.coverage.Category.geophysics()
Returns the {@linkplain org.geotools.coverage.grid.ViewType#GEOPHYSICS geophysics} or{@linkplain org.geotools.coverage.grid.ViewType#PACKED packed} of this category.By definition, a geophysics category is a category with a {@linkplain #getRange range of sample values} transformed in such a way that the{@linkplain #getSampleToGeophysics sample to geophysics} transform is always the{@linkplain MathTransform1D#isIdentity identity} transform, or {@code null} if nosuch transform existed in the first place. In other words, the range of sample values in a geophysics category maps directly the "real world" values without the need for any transformation.
{@code Category} objects live by pair: a{@linkplain org.geotools.coverage.grid.ViewType#GEOPHYSICS geophysics} one (used forcomputation) and a {@linkplain org.geotools.coverage.grid.ViewType#PACKED packed} one(used for storing data, usually as integers). The {@code geo} argument specifies whichobject from the pair is wanted, regardless if this method is invoked on the geophysics or packed instance of the pair.
Newly constructed categories are {@linkplain org.geotools.coverage.grid.ViewType#PACKED packed} (i.e. a {@linkplain #getSampleToGeophysics sample to geophysics} transform mustbe applied in order to gets {@linkplain org.geotools.coverage.grid.ViewType#GEOPHYSICS geophysics} values). @param geo {@code true} to get a category with an identity{@linkplain #getSampleToGeophysics transform} and a{@linkplain #getRange range of values} matching the{@linkplain org.geotools.coverage.grid.ViewType#GEOPHYSICS geophysics} values, or{@code false} to get the {@linkplain org.geotools.coverage.grid.ViewType#PACKED packed} category (the one constructed with {@code new Category(...)}). @return The category. Never {@code null}, but may be {@code this}. @see GridSampleDimension#geophysics @see org.geotools.coverage.grid.GridCoverage2D#view

        }
        final NumberRange range = deriveRange(ranges, parameters);
        if (range != null) {
            final Category category = categories[PRIMARY_SOURCE_INDEX];
            return new Category(category.getName(), category.getColors(),
                                category.geophysics(false).getRange(), range).geophysics(true);
        }
        return null;
    }


    /**

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     * masks and the value range in the source grid coverage.
     */
    protected Category deriveCategory(final Category[] categories, final Parameters parameters) {
        NumberRange          range = null;
        Category          category = categories[0];
        final NumberRange  samples = category.geophysics(false).getRange();
        final boolean isGeophysics = (category == category.geophysics(true));
        /*
         * Computes a default range of output values one from the normalized kernels.
         * The normalization has been done by 'deriveGridCoverage' before this method
         * is invoked. The algorithm is as below:

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     */
    protected Category deriveCategory(final Category[] categories, final Parameters parameters) {
        NumberRange          range = null;
        Category          category = categories[0];
        final NumberRange  samples = category.geophysics(false).getRange();
        final boolean isGeophysics = (category == category.geophysics(true));
        /*
         * Computes a default range of output values one from the normalized kernels.
         * The normalization has been done by 'deriveGridCoverage' before this method
         * is invoked. The algorithm is as below:
         *

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        final KernelJAI mask2 = (KernelJAI) block.getObjectParameter("Mask2");
        final double size = (mask1.getWidth() + mask1.getHeight() +
                             mask2.getWidth() + mask2.getHeight()) / 4.0;
        double factor = getNormalizationFactor(mask1, mask2) / (size-1);
        if (factor>0 && !Double.isInfinite(factor)) {
            range = category.geophysics(true).getRange();
            final double minimum = range.getMinimum();
            final double maximum = range.getMaximum();
            factor *= (maximum - minimum) * DEFAULT_RANGE_SCALE;
            range = NumberRange.create(0, factor);
        }

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            factor *= (maximum - minimum) * DEFAULT_RANGE_SCALE;
            range = NumberRange.create(0, factor);
        }
        if (range != null) {
            category = new Category(category.getName(), DEFAULT_COLOR_PALETTE, samples, range);
            return category.geophysics(isGeophysics);
        }
        return super.deriveCategory(categories, parameters);
    }


    /**

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        Category category = categories.get(0);
        assertTrue(category.getName().equals(Category.NODATA.getName()));


        // Check that it does not contain sampleToGeophisics and that the Range contains only NaN
        assertNull(category.getSampleToGeophysics());
        assertEquals(category.geophysics(true).getRange().getMinimum(), Double.NaN, DELTA);
        assertEquals(category.geophysics(true).getRange().getMaximum(), Double.NaN, DELTA);


        // Quantitative nodata category
        sampleDim = new GridSampleDimension("original", new Category[] { new Category(
                Vocabulary.formatInternational(VocabularyKeys.NODATA), new Color[] { new Color(0,

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        assertTrue(category.getName().equals(Category.NODATA.getName()));


        // Check that it does not contain sampleToGeophisics and that the Range contains only NaN
        assertNull(category.getSampleToGeophysics());
        assertEquals(category.geophysics(true).getRange().getMinimum(), Double.NaN, DELTA);
        assertEquals(category.geophysics(true).getRange().getMaximum(), Double.NaN, DELTA);


        // Quantitative nodata category
        sampleDim = new GridSampleDimension("original", new Category[] { new Category(
                Vocabulary.formatInternational(VocabularyKeys.NODATA), new Color[] { new Color(0,
                        0, 0, 0) }, NumberRange.create(-9999, -9999), NumberRange.create(-9999,

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        category = categories.get(0);
        assertTrue(category.getName().equals(Category.NODATA.getName()));


        // Check if it contains sampleToGeophisics and the Range contains the first nodata defined
        assertNotNull(category.getSampleToGeophysics());
        assertEquals(category.geophysics(true).getRange().getMinimum(), noData1, DELTA);
        assertEquals(category.geophysics(true).getRange().getMaximum(), noData1, DELTA);
    }


    /**
     * Test that if no range is defined, Category values or Default values are used

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        assertTrue(category.getName().equals(Category.NODATA.getName()));


        // Check if it contains sampleToGeophisics and the Range contains the first nodata defined
        assertNotNull(category.getSampleToGeophysics());
        assertEquals(category.geophysics(true).getRange().getMinimum(), noData1, DELTA);
        assertEquals(category.geophysics(true).getRange().getMaximum(), noData1, DELTA);
    }


    /**
     * Test that if no range is defined, Category values or Default values are used
     *

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