I'm reading the sample values of geotiff with this simple code:
public static void main(String[] args)
{
try
{
System.out
.println(java.nio.charset.Charset.defaultCharset().name());
// System.exit(0);
// Set the default locale to pre-defined locale
// Locale.setDefault(new Locale("en", "US"));
BufferedImage image = ImageIO.read(new File(
"C:\\aaa\\combustibile.tif"));
Raster rr = image.getRaster();
int[] bandOffsets = new int[rr.getNumBands()];
int dd = rr.getSampleModel().getDataType();
for (int z = 0; z < rr.getSampleModel().getNumBands(); z++)
for (int i = 0; i < rr.getWidth(); i++)
for (int j = 0; j < rr.getHeight(); j++)
{
String sample = getSample(i, j, z, dd, rr);
System.out.println("Sample value " + sample);
}
} catch (IOException ex)
{
ex.printStackTrace();
}
}
private static String getSample(int i, int j, int z, int type,
final Raster raster)
{
String result = "";
try
{
switch (type)
{
case TIFFTag.TIFF_BYTE:
result = "" + raster.getSample(i, j, z);
break;
case TIFFTag.TIFF_UINT32:
result = "" + raster.getSample(i, j, z);
break;
case TIFFTag.TIFF_FOLAT32:
result = "" + raster.getSampleFloat(i, j, z);
break;
case TIFFTag.TIFF_INT16:
result = "" + raster.getSample(i, j, z);
break;
case TIFFTag.TIFF_UINT16:
result = "" + raster.getSample(i, j, z);
break;
default:
break;
}
} catch (IllegalArgumentException a)
{
a.printStackTrace();
throw a;
} catch (ClassCastException e)
{
e.printStackTrace();
throw e;
}
return result;
}
and I obtain the correct values for example 4.0
When I change the raster image read on filesystem, with the rendered image
obtained by udig raster layer, I obtain different values. For example in the
pixel with value 4.0 I found 1.512366E38.
Where is the problem?
How can I solve it?
Cheers
Pasquale Paola
............................................................................
........................
Pasquale Paola
Engineering Ingegneria Informatica S.p.a.
Direzione: Ricerca ed Innovazione
Via Terragneta, 90
80058 Torre Annunziata (NA)
Tel. +39.081.862.68.21
Fax +39.081.862.68.19
e-mail:[email protected]
http://www.linkedin.com/in/pasqualepaola
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