VariableAdapter.UnidataSpatialDomain spatialDomain = (UnidataSpatialDomain) source.getSpatialDomain();
GridEnvelope2D gridRange = spatialDomain.getGridGeometry().getGridRange2D();
RasterLayout rasterElement = spatialDomain.getRasterElements(false, null).iterator().next();
SampleModel sampleModel = new BandedSampleModel(DataBuffer.TYPE_DOUBLE, (int)gridRange.getWidth(), (int)gridRange.getHeight(), 1);
ColorModel colorModel = ImageIOUtilities.createColorModel(sampleModel);
Rectangle rect = rasterElement.toRectangle();
ImageLayout layout = new ImageLayout(rect.x, rect.y, rect.width, rect.height);
layout.setSampleModel(sampleModel);
layout.setColorModel(colorModel);
return layout;