The dataspace is 5185*4967 size.
The file size is150MByte.
I'd like to read this data.
Metadata that checked by HDFView
Band 1 BB Image Pixel Values (800)
32-bit floating-point, 5185 x 4967
Number of attributes = 1
I made out the below code.
//////////
public static void main(String arag[]){
H5FileRead h5FileRead = new H5FileRead();
String fileName = File.separator + "COMS_GOCI_L2B_GA_20100820051641.he5";
String grpPath = "/HDFEOS/GRIDS/Image Data/Data Fields";
int DIM_X = 1000;
int DIM_Y = 1000;
Float[][] dset_data = new Float[DIM_X][DIM_Y];
int file_id = -1;
int filespace_id = -1;
int dataset_id = -1;
int dcpl_id = -1;
h5FileRead.setFileName(fileName);
H5File file = null;
Dataset dataSet = null;
file = new H5File(h5FileRead.getFileName(), H5File.READ);
// Open an existing file.
try {
file_id = H5.H5Fopen(h5FileRead.getFileName(), HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
}catch (Exception e) {
e.printStackTrace();
}
try{
Object rootObj = (Object)file.get(grpPath);
System.out.println(file.get(grpPath));
int count = 0;
Group rootGropu = null;
if(rootObj instanceof Group){
System.out.println("Group");
rootGropu = (Group)rootObj;
int gid = rootGropu.open();
count = rootGropu.getMemberList().size();
}else if(rootObj == null){
System.out.println("null");
}else{
System.out.println("else");
}
if(count > 0){
for(int i=0 ; i<count ; i++){
dataSet = (Dataset)rootGropu.getMemberList().get(i);
dataSet.init();
long hepSize = Runtime.getRuntime().totalMemory();
long[] dims = dataSet.getDims();
System.out.println("dataSet:" + dataSet);
System.out.println("size:"+ dataSet.getHeight() + "::" + dataSet.getWidth());
// Open an existing dataset.
try{
if(file_id >= 0){
dataset_id = H5.H5Dopen(file_id, grpPath + "/" + dataSet.toString());
}
}catch(Exception e){
e.printStackTrace();
}
int[] data = null;
try{
if(dataset_id >= 0){
filespace_id = H5.H5Dget_space(dataset_id);
int rank = dataSet.getRank();
int[] selectedIndex = dataSet.getSelectedIndex();
long[] start = dataSet.getStartDims();
long[] stride = dataSet.getStride();
long[] cnt = dataSet.getSelectedDims();
long[] block = stride;
if(filespace_id >= 0){
/*---------------important*/
H5.H5Sselect_hyperslab(filespace_id, HDF5Constants.H5S_SELECT_SET, start, stride, cnt, block);
// Read the data using the previously defined hyperslab.
if((dataset_id >= 0) && (filespace_id >= 0)){
H5.H5Dread(dataset_id, HDF5Constants.H5T_NATIVE_FLOAT, HDF5Constants.H5S_ALL, filespace_id, HDF5Constants.H5P_DEFAULT, dset_data);
}
/*--------------------------*/
}
}
// Output the data to the screen.
System.out.println("Data as read from disk by hyberslab:");
for (int indx = 0; indx < DIM_X; indx++) {
System.out.print(indx + ": [ ");
for (int jndx = 0; jndx < DIM_Y; jndx++)
System.out.print(dset_data[indx][jndx] + " ");
System.out.println("]");
}
System.out.println();
}catch(OutOfMemoryError err){
err.printStackTrace();
throw new RuntimeException("Out of memory error.") ;
}
}
}
}catch(Exception ex){
log.error(ex.toString());
}finally{
try{
if(filespace_id >= 0)
H5.H5Sclose(filespace_id);
}catch(Exception e){
e.printStackTrace();
}
try{
if(dataset_id >= 0)
H5.H5Dclose(dataset_id);
}catch(Exception e){
e.printStackTrace();
}
// Close the file.
try{
if(file_id >= 0)
H5.H5Fclose(file_id);
}catch(Exception e){
e.printStackTrace();
}
if(file != null){
file.close();
}
}
}
/////////////////////////////////////////////////////
like this.
I can find out the error from above important part.
How do we them?
Thanks
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