Hi César,
Many thanks for posting your sample code to the list.
Below is a slightly modified version that avoids deprecated classes
and methods. I haven't tested this yet, but hopefully it will be
useful to you when you get back to it.
All the best
Michael
public void createBigTiff(File file) {
/*
* I first decide if tiling must be used and which size must be used
* (borrowed from ArcGridsImageReader),
* then I create the image, then I fill all the image with some useless
* values, and finally try to create a coverage and write this to disk
* by using GeoTiffWriter.
*/
/** Minimum size of a certain file source that neds tiling. */
final int MIN_SIZE_NEED_TILING = 5242880; // 5 MByte
/** Defaul tile size. */
final int DEFAULT_TILE_SIZE = 1048576 / 2; // 1 MByte
// if the imageSize is bigger than MIN_SIZE_NEED_TILING
// we proceed to image tiling
boolean isTiled = false;
/**
* Tile width for the underlying raster.
*/
int tileWidth = -1;
/**
* Tile height for the underlying raster.
*/
int tileHeight = -1;
/** Image Size */
long imageSize = -1;
try {
CoordinateReferenceSystem crs = CRS.decode("EPSG:3035");
int width = 30000, height = 28000;
int sampleSizeByte =
DataBuffer.getDataTypeSize(DataBuffer.TYPE_FLOAT);
imageSize = (long) width * (long) height * (long) sampleSizeByte;
/**
* Setting Tile Dimensions (If Tiling is supported)
*/
// if the Image Size is greater than a certain dimension
// (MIN_SIZE_NEED_TILING), the image needs to be tiled
if (imageSize >= MIN_SIZE_NEED_TILING) {
isTiled = true;
// This implementation supposes that tileWidth is
equal to the width
// of the whole image
tileWidth = width;
// actually (need improvements) tileHeight is given by
// the default tile size divided by the tileWidth
multiplied by the
// sample size (in byte)
tileHeight = DEFAULT_TILE_SIZE / (tileWidth * sampleSizeByte);
// if computed tileHeight is zero, it is setted to 1
as precaution
if (tileHeight < 1) {
tileHeight = 1;
}
} else {
// If no Tiling needed, I set the tile sizes equal to the image
// sizes
tileWidth = width;
tileHeight = height;
}
Envelope envelope = new Envelope2D(crs,
0, 0,
width, height);
SampleModel sampleModel = new ComponentSampleModel(
DataBuffer.TYPE_FLOAT,
tileWidth, tileHeight,
1, tileWidth,
new int[]{0});
DiskMemImage img = new DiskMemImage(width, height, sampleModel);
WritableRectIter iter = RectIterFactory.createWritable(img, null);
do {
int x = 0;
do {
iter.setSample(x / tileWidth);
} while (!iter.nextPixelDone());
} while (!iter.nextLineDone());
GridCoverageFactory factory =
CoverageFactoryFinder.getGridCoverageFactory(null);
GridCoverage2D gc = factory.create("bigtif", img, envelope);
GeoTiffFormat fmt = new GeoTiffFormat();
//getting the write parameters
final GeoTiffWriteParams wp = new GeoTiffWriteParams();
//setting compression to Deflate
wp.setCompressionMode(GeoTiffWriteParams.MODE_EXPLICIT);
wp.setCompressionType("Deflate");
wp.setCompressionQuality(0.75F);
//setting the tile size to 256X256
wp.setTilingMode(GeoToolsWriteParams.MODE_EXPLICIT);
wp.setTiling(256, 256);
//setting the write parameters for this geotiff
final ParameterValueGroup[] params = {
fmt.getWriteParameters()
};
params[0].parameter(
AbstractGridFormat.GEOTOOLS_WRITE_PARAMS.getName().toString()).setValue(wp);
AbstractGridCoverageWriter writer = new GeoTiffWriter(file);
writer.write(gc.view(ViewType.GEOPHYSICS), params);
} catch (Exception e) {
e.printStackTrace();
}
}
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