geopackage-sdk/src/main/java/mil/nga/geopackage/extension/coverage/CoverageDataPng.java
@Override
    public Double getValue(GriddedTile griddedTile,
                           CoverageDataPngImage image, int x, int y) {
        Double value = null;
        if (image.getReader() != null) {
            int pixelValue = image.getPixel(x, y);
            value = getValue(griddedTile, pixelValue);
        } else {
            value = getValue(griddedTile, image.getImageBytes(), x, y);
        }
        return value;
    }
@Override
    public Double getValue(GriddedTile griddedTile,
                           CoverageDataPngImage image, int x, int y) {
        Double value = null;
        if (image.getReader() != null) {
            int pixelValue = image.getPixel(x, y);
            value = getValue(griddedTile, pixelValue);
        } else {
            value = getValue(griddedTile, image.getImageBytes(), x, y);
        }
        return value;
    }
{@inheritDoc}